forum.ww1aircraftmodels.com

WW1 Aircraft Modeling => Under Construction => Scratch builds => Topic started by: lone modeller on February 02, 2021, 09:22:12 AM

Title: 1/72 Grahame-White Type X Charabanc
Post by: lone modeller on February 02, 2021, 09:22:12 AM
Evening All,

I am not sure whether this should be here in scratch builds or in pre-1914 types: it can be reasonably classified as either, so if the mods think it is in the wrong place please would you move it.

This was a civilian machine, (as far as I am aware there was only one), built by the Grahame-White Company in 1913 for joy riding at the aerial displays held at the factory site at Hendon, (now the site of the RAF Museum), in north London. The aircraft was important for a number of reasons which I will describe later, but for me some very important reasons for it being an excellent choice is that it is a pusher(!) and there is no kit available. I suspect that most readers will be unaware of the type, (as I was until relatively recently), so here is a link to information about it: http://flyingmachines.ru/Site2/Crafts/Craft28796.htm

I have made a small start by cutting the main flying surfaces from 30 thou card which had been bent in boiling water in a water pipe. The lower wing was one piece and had a shorter span than upper. The latter had extensions which were slightly swept back so I have had to cut these separately and will glue them to the centre section later when I have added and sanded the ribs. The wings and horizontal tail surfaces had a very marked curvature - as shown on the Flight drawings but also clearly visible in photographs. I have not cut out the rudders yet - I will do so later.

(https://live.staticflickr.com/65535/50899839197_d4a5dc8369_c.jpg) (https://flic.kr/p/2kxQYSr)

The above image shows the top wing sections (top), the lower wing with 10 x 20 thou Evergreen strip cemented on prior to sanding to represent ribs (centre), and the two tail surfaces, one with strip and one without (bottom).

I have also cut out plastic for the nacelle. I am using 30 thou card for the sides and 20 thou for the floor and nose, which is one piece.

(https://live.staticflickr.com/65535/50899839187_927a4cec18_c.jpg) (https://flic.kr/p/2kxQYSg)

The curves on the sides of the floor/nose are there because the nose tapered a little, the crosswise curve at the end is the pilot's position. I intend to make a simple box structure using card braces to make the nacelle and then remove the braces and replace them with wire rods when it is dry and firm. I have bought some wicker seats from Barracuda Studios which i will use for the pilot and passengers. It is my intention to scratch build all of the other parts.

More later when I have made the nacelle and finished the ribs on the flying surfaces.

Thanks for looking.

Stephen.
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Alexis on February 02, 2021, 11:55:24 AM
Cool Stephen , now that is neat pusher indeed . Even though it was for the joy of the ride still has a graceful appearance . Will be following along as this unfolds  :)


Alexis
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Rookie on February 02, 2021, 05:27:12 PM
This is a fun aircraft and I am sure it is going to be a great build Stephen!

I will keep a close watch  :D

Are you going to scratch build the engine also?

Willem

Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: FAf on February 02, 2021, 08:23:16 PM
Looks excellent and I'm sure it will be a very interesting build to follow!
/Fredrik
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: rhallinger on February 02, 2021, 08:49:43 PM
Great subject Stephen!  As always, I will enjoy your build.  Thanks for sharing.

Best regards,

Bob
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Bughunter on February 02, 2021, 09:55:23 PM
Stephen, I will follow your build for sure!
Please enjoy  and entertain the community with the features of a unknown type 8)

Cheers,
Frank
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lone modeller on February 03, 2021, 05:59:07 AM
Thanks to all who have commented so far - I will try to ensure that updates are fairly regular and informative.

Willem: I will be scratch building the engine. I made one many years ago for an FE 2b conversion, so I have got form in this department.

Stephen.
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: ermeio on February 03, 2021, 07:18:43 AM
excellent choice !
er me
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lone modeller on February 09, 2021, 09:25:39 PM
Evening All,

Thank you Ermio for passing by and leaving a comment.

Some might have thought that with all this enforced free time I would have raced on with this project. Sadly not so as I lack the energy/motivation to do so - like many others here and elsewhere I read. I have managed to put Mr Surfacer around the ribs on the wings, and have started the laborious process of rubbing the ribs down again:

(https://live.staticflickr.com/65535/50924676333_3a792f6276_c.jpg) (https://flic.kr/p/2kA3h5V)

The above shows (top) the wing with the strips glued in place, (middle) after application of Mr Surfacer filler, (bottom) the flying surfaces after the filler has been sanded and smoothed but not primed. Sanding off the 4 surfaces in the lower part of the image took nearly 2 hours.....

So in the meantime I have made some othe parts. Here is the nacelle structure completed - including having filled around the curved section of the nose because I just could not get the card to fit properly. Grrr.

(https://live.staticflickr.com/65535/50925363936_75604169fa_c.jpg) (https://flic.kr/p/2kA6Nu9)

(https://live.staticflickr.com/65535/50925491702_ec6c173519_c.jpg) (https://flic.kr/p/2kA7st1)

Note in the top image tha I have added filler to the underside - joints are rarely perfect in scratch building. Also the rear has still to be fixed properly - the floor follows the sides completely. In the second image the bulkheads are there to hold the sides rigid and square while the cement dries- they were only tacked in and have since been removed.

I made a slatted floor for the cockpit - I am sure they must have had one for the passengers to stand on because that would have been lighter than a heavy gauge plywood alternative, but this is modellers licence as I know of no photos of the interior.

(https://live.staticflickr.com/65535/50925491647_a8da516b7a_c.jpg) (https://flic.kr/p/2kA7ss4)

I have also painted the engine - acrylics for the aluminium and Humbrol metallic enamel for the cylinders. I have still got to dirty it a bit as it is much too shiny. I have also got to make and add some of the other details - they will come later.

(https://live.staticflickr.com/65535/50925491642_db54423fa1_c.jpg) (https://flic.kr/p/2kA7srY)

(https://live.staticflickr.com/65535/50925491602_8000629e25_c.jpg) (https://flic.kr/p/2kA7srh)

(https://live.staticflickr.com/65535/50924676238_37e8c3e525_c.jpg) (https://flic.kr/p/2kA3h4h)

Thanks for looking.

Stephen.
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Alexis on February 09, 2021, 10:51:39 PM
Well I would say , you are making better progress then I'm Stephen . She is looking fab so far so just Imagin yourself a week from now on the progress you have made , because you know you can creating an inner glow that will shine bright ! Looking forward on the next round of up-dates  :)


Alexis
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: RAGIII on February 09, 2021, 11:13:09 PM
All I can say is that this is your usual Superb work Stephen! Looking forward to more!!
RAGIII
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: kensar on February 09, 2021, 11:55:38 PM
You're progressing nicely on this, Stephen.
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Bughunter on February 10, 2021, 12:02:07 AM
Sanding off the 4 surfaces in the lower part of the image took nearly 2 hours.....
My brain transferred some letters of "nearly" after the 2 and I read this as "2 years" :o I'm getting old ...
Luckily you finished this task earlier! Looks like real ribs with tape.

Cheers,
Frank
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lcarroll on February 10, 2021, 03:03:51 AM
Great choice Stephen, about as unusual a subject as there is and I know you'll do it justice. As always I'll be following your progress as you simplify the obstacles of improvisation and the unknown .......... This will be an impressive model once completed!
Cheers,
Lance
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: IanB on February 11, 2021, 03:03:56 AM
Another one I've never heard of, and a good start so far. I'm looking forward to seeing what it actually looks like!

Ian
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lone modeller on February 15, 2021, 10:38:52 PM
Evening All,

Thanks Alexis, Rick, Ken, Frank, Lance and Ian for the very generous and kind comments - I really appreciate them.

I have being painting a great deal lately, including the struts and undercarriage legs (there are a lot of them!) - Revell semi-matt 382 tan for the wood, and then a pale blue (mix of Humbrol matt blue (25) and white) for the reinforcing bands. That alone took quite a lot of time.

(https://live.staticflickr.com/65535/50941432893_aac90299e1_c.jpg) (https://flic.kr/p/2kBwae8)

Of course the above is just a small number of the pieces - there are very many more as will be shown on the model later.

I have also painted the engine and made the exhaust and carburettor parts.

(https://live.staticflickr.com/65535/50925491642_db54423fa1_c.jpg) (https://flic.kr/p/2kA7srY)

(https://live.staticflickr.com/65535/50925491602_8000629e25_c.jpg) (https://flic.kr/p/2kA7srh)

The exhaust was very large: from photographs it seems to have been designed to quieten the engine so that when the aircraft was flown low over the crowds a Klaxon could be sounded! (The klaxon is very clear in some early photos; later it was removed and replaced by a long step on the port side of the nacelle). I will fix the exhaust and fuel pipes after I have fixed the engine mounting in the rear of the nacelle. The frame on which the engine was mounted was made from plastic strip and has been painted and rigged.

(https://live.staticflickr.com/65535/50942234887_8205c0509b_c.jpg) (https://flic.kr/p/2kBAgCB)

(https://live.staticflickr.com/65535/50942126366_a26db319af_c.jpg) (https://flic.kr/p/2kBzHny)

(https://live.staticflickr.com/65535/50942126251_9f4b165a58_c.jpg) (https://flic.kr/p/2kBzHkz)

The seats I am using are from the Barracuda Studios 1/72 wicker seats in resin:

(https://live.staticflickr.com/65535/50942126491_8bda50c3e2_c.jpg) (https://flic.kr/p/2kBzHpH)

(https://live.staticflickr.com/65535/50942126471_d80b12b6b6_c.jpg) (https://flic.kr/p/2kBzHpn)

I had previously used one of their 1/32 scale seats and it was of the highest quality. These are no different - there are two seats per pack and they are easily removed from the casting blocks with a razor saw. The texture on them is beautifully represented. I made some simple cushions from one of the card headers and painted these to represent slightly worn covers:

(https://live.staticflickr.com/65535/50942235017_9a5b825402_c.jpg) (https://flic.kr/p/2kBAgER)

They will be barely visiible and in this scale it is very difficult, (at least for me), to represent nice neat buttoned seat cushions! There are five of these - 4 for the passengers and one for the pilot.

Finally I have painted all of the wings, tail unit and fuselage with a mixture of white and Humbrol CDL (103), acrylics: - about 6 coats all of which had been thinned and applied with a hairy stick. Prior to fixing the engine in the rear of the nacelle I made and inserted a pertol and oil tank. I am not sure how accurate this is because I cannot see either of these in the photographs. On RFC aircraft the oil tank was mounted on the side of the engine beneath the exhaust pipe, but on this machine the exhaust was so large I cannot see where the tank could have been mounted, and on the only photo I have found of the starboard side of the aircraft showing the engine, there is no sign of an oil tank at all. Photos of the aircraft taken later in its career show that a gravity tank was mounted under the top wing, but this is absent in early photos and as I am trying to represent the machine in its early phase I have assumed that the tank was in front of the engine in the nacelle.

(https://live.staticflickr.com/65535/50942126281_da2cec0190_c.jpg) (https://flic.kr/p/2kBzHm6)

(https://live.staticflickr.com/65535/50941432868_7c128e1077_c.jpg) (https://flic.kr/p/2kBwadG)

Finally I have rigged the interior of the nacelle with rolled copper wire before I add the seats:

(https://live.staticflickr.com/65535/50941432853_30a3ab43e8_c.jpg) (https://flic.kr/p/2kBwadr)

There is till quite a lot to do before I can start mounting the top wing, but I have realised that this machine was a highly modified Maurice Farman MF 7 Longhorn, not an original design. That means that I can follow closely the build sequence for the Longhorn that I scratch built several years ago which will save me having to think too much about what to do and when!

Thanks for looking.

Stephen.
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: RAGIII on February 15, 2021, 11:34:09 PM
Outstanding work as always Stephen! I Love your CDL color and the interior, seats, etc. are Fantastic! Looking forward to the Next Update  8)
RAGIII
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lcarroll on February 16, 2021, 12:12:44 AM
    Another great start Stephen, and again a new subject to learn of. Those Barracuda seats are a wonderful little addition, I didn't realize they were available in 1:72 as well. In my experience they are the top of the A/M scale of quality and add a lot to a model.
    Discovering it's genesis related to the Longhorn you built will indeed simplify the construction details, nice work on research there! Looking forward to following along on this new journey as always with your Builds.
Cheers,
Lance
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Alexis on February 16, 2021, 12:36:53 AM
Excellent jump on constructing and painting the parts Stephen , really like the engine  :)


Alexis
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lone modeller on February 22, 2021, 08:44:47 PM
Evening All,

Thanks Rick, Lance and Alexis for dropping by and leaving the encouraging comments. I deduced that this was a veriant of the Longhorn because the general arrangement of the airframe is very similar, down to the undercarriage, strut arrangements and overhangs on the upper wing. These appear to me to be variations on a basic theme rather than a completely new design.

The booms and tail units were fixed to the wings using my standard method for True Scale Real Aeroplanes. I file a groove in the wing surfaces with a round file and check that the boom, (florists wire in this case), sits well and is aligned with the plans. Small slots were cut in the leading edges of the tail planes - again the plans were used to get the correct locations. I used epxoy resin for attachment because this gave me wriggle time but begins to harden fairly quickly so that the chances of movement while curing are much reduced. My standard jig No 2 was used to support the structures while they cured. Leading edges were laid over the plans to achieve correct alignments and plastic card to support parts while the epoxy cured.

The lower wing:

(https://live.staticflickr.com/65535/50967776377_7fd6da970b_c.jpg) (https://flic.kr/p/2kDRbe8)

(https://live.staticflickr.com/65535/50967669241_a90953d9c0_c.jpg) (https://flic.kr/p/2kDQCnX)

(https://live.staticflickr.com/65535/50966962963_4d1ac67118_c.jpg) (https://flic.kr/p/2kDM1qK)

The paint pot helped to keep the horizontal position of the tail unit - the curvature of the tail surfaces is quite marked and this extra support was an unexpected requirement.

The upper wing had a slightly more complex jig:

(https://live.staticflickr.com/65535/50966962738_78713f6193_c.jpg) (https://flic.kr/p/2kDM1mS)

(https://live.staticflickr.com/65535/50967776352_ca4cc96eca_c.jpg) (https://flic.kr/p/2kDRbdG)

(https://live.staticflickr.com/65535/50966962843_5c6fe9016b_c.jpg) (https://flic.kr/p/2kDM1oF)

After the epoxy had cured over 24 hours the two sub-assemblies could be compared for alignments:

(https://live.staticflickr.com/65535/50966962703_4156b34fcc_c.jpg) (https://flic.kr/p/2kDM1mg)

The engine sub-assembly was fitted into the rear of the nacelle, after I had added a small fuel and oil tank. I have not found any photographs of this part of the machine so what I have done is pure guesswork: I am not even certain how the engine frame was attached to the airframe, but as it will all be under the wing nobody is going to be able to take a very close look. Anyway, sometimes one has to use modeller's license! Contemporary photographs of this part of the aeroplane showed that the rear of the engine frame really did stand clear of the trailing edge of the wing:

(https://live.staticflickr.com/65535/50966962778_ef2c2e76c3_c.jpg) (https://flic.kr/p/2kDM1ny)

(https://live.staticflickr.com/65535/50967776282_0565cb4123_c.jpg) (https://flic.kr/p/2kDRbcu)

Now the real test awaits: mounting the top wing to the lower and putting in the struts and starting the rigging. I will photograph the different stages and post them next time.

Thanks for looking.

Stephen.
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: William Adair on February 22, 2021, 09:01:49 PM
Looking good!  I did a real double-take there when I saw the number of seats inside!
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: RAGIII on February 22, 2021, 10:47:58 PM
Terrific progress Stephen. Your wing alignment jigs are the best ! As always I am amazed at the results of your work!
RAGIII
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: kensar on February 22, 2021, 11:26:55 PM
Great work, Stephen.  This is turning out very well.  Nicely detailed.
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Alexis on February 23, 2021, 01:06:55 AM
Great work, Stephen.  This is turning out very well.  Nicely detailed.

Second this , well done so far Stephen !

Alexis
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Bughunter on February 24, 2021, 07:06:51 AM
Looks already like a passenger plane ;)
The seats are a very nice addition!

Cheers,
Frank
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Early Bird Fan on February 24, 2021, 03:50:24 PM
up to your usual standard Stephen and those seats look great, i might have to get me some of those
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: RLWP on February 24, 2021, 10:46:23 PM
I say, what larks!

Will you be running flights around the aerodrome?

Richard
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lone modeller on March 02, 2021, 07:57:27 AM
Evening All,

Thanks William, Rick, Ken, Alexis, Frank, EBF, and Richard for leaving your very kind comments. Richard: I will not be taking any flights around the aerodrome at the moment because the pilot's seat dropped out the other day and I have still to put it back in - it can wait until I have nearly finished now! After that I might consider giving you a lift - for a suitable fee!!

Putting wings on biplanes is, I know, one of the features that deters many modellers from building them. Rigging is another deterrent for some, so in this post I will try to reveal some of the (dirty) secrets that I use to build multi-bay biplanes. On this aircraft the struts were at 90 degrees to the wings so mounting them is a straightforward process, provided that they are put in carefully using the following simple procedure:

1. I cemented the 4 centre struts to the lower wing - two in each side of the nacelle;
2. I cemented the two centre struts to the tail unit;
3. while these struts were still setting and therefore able to be moved I laid the upper wing sub-assembly on the bench and put small drops of cement into the locating holes in the underside of the wing and tail unit;
4. I gently lowered the lower wing sub-assembly on to the upper wing adjusting the struts as necessary to fit into the holes on the wing and tail unit;
5. I adjusted the assemblies so that the lower wing assembly was exactly over the top wing and then held the lot in position with a standard Mk 1 jig:

(https://live.staticflickr.com/65535/50992893206_3107ba8bd4_c.jpg) (https://flic.kr/p/2kG4UzU)

(https://live.staticflickr.com/65535/50992197628_a68fc7a311_c.jpg) (https://flic.kr/p/2kG1kPb)

Provided that the wings and booms are correctly aligned this jig will work well because it keeps the leading edges of the wings parallel and square and supports the tail unit at the same time. I left this overnight to dry out thoroughly. In the morning I could carefully invert the assembly and handle it without fear that it would fall apart:

(https://live.staticflickr.com/65535/50992893151_508cd4c71f_c.jpg) (https://flic.kr/p/2kG4UyX)

(https://live.staticflickr.com/65535/50992197518_7ecdf335c9_c.jpg) (https://flic.kr/p/2kG1kMh)

Clearly this is not the strongest of assemblies, so to help stabilize it I added the outer wing struts. I put drops of cement on to the ends of the struts and gently push them into place making sure that they are in line with the other struts and are vertical when viewed from the front. A little weight was put on top of the wing to ensure that the joints are held together while the cement sets:

(https://live.staticflickr.com/65535/50992197508_1a5613b9fe_c.jpg) (https://flic.kr/p/2kG1kM7)

(https://live.staticflickr.com/65535/50993010052_ae09ee7d9c_c.jpg) (https://flic.kr/p/2kG5vju)

With the wings secure I put the front struts into the tail unit because that helped to stabilize the rear of the assembly while I added the radiator. This was cut form 60 thou card and scoured to represent the grille. It was suspended on wires between the rear inner wing struts just in front of the engine - I used thin copper wire which I CA'd to the sides of the radiator and bent the wires so that I could CA the ends to the srtuts. I wanted as much space as I could have while doing this - hence the remaining wing struts were left off until this task was completed. The water pipes were made from rod with the outlet from the engine to radiator cemented to the top of the engine and the lower pipe extended to the water pump on the front end of the engine. Unfortunately I was unable to get good pictures of this assembly because I cannot get the camera into the tiny space and have enough light to see things properly:

(https://live.staticflickr.com/65535/50993010027_9daa91794f_c.jpg) (https://flic.kr/p/2kG5vj4)

(https://live.staticflickr.com/65535/50992892886_f3b4e4dc7a_c.jpg) (https://flic.kr/p/2kG4Uuo)

Having put the radiator in place I rigged the centre struts and front bays of the tail as these will be difficult to reach later:

(https://live.staticflickr.com/65535/50992197368_b1c6d08476_c.jpg) (https://flic.kr/p/2kG1kJG)

Rigging with rolled copper wire is easy. The length of wire needed is measured directly from the model by using a pair of dividers. The wire is measured with the dividers and a length cut from the spool. This is rolled between a piece of brass strip and a block of wood which had been sanded flat. The wire is held against the model to check it for length: I usually cut the wire a fraction too long before rolling it out so that I can trim it if necessary. If the wire is too long I use my Mk 1 eyeball and experience to judge how much needs to be removed. I place a small drop of CA on the model in the two places where the ends of the wire are to be attached and gently place the wire on to the model. With a little practice this can be a fairly quick and easy method.

Next I added all of the remaining struts on the wings and tail unit, and rigged fore-aft between the wing struts, the rear of the wing struts and the remainder of the tail.

(https://live.staticflickr.com/65535/50993009897_efb2cd4754_c.jpg) (https://flic.kr/p/2kG5vgP)

(https://live.staticflickr.com/65535/50992197343_3d436db7bc_c.jpg) (https://flic.kr/p/2kG1kJg)

There is still much rigging left to attach, but with these areas done I do not have to worry about access and knocking small pieces off later. Most of what has been attached is unlikely to be damaged when I add the remaining sub-assemblies and details.

Thanks for looking.

Stephen.
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Bughunter on March 02, 2021, 08:07:58 AM
A big jump forward - with a biplane and rigging lines!

and then held the lot in position with a standard Mk 1 jig

Stephen, now I'm especially excited to see what the Mk 2, 3 and especially number 4 jigs look like! ;D

Cheers,
Frank
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Alexis on March 02, 2021, 12:03:09 PM
Stephen ,

Wonderful progress !


Alexis
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Early Bird Fan on March 02, 2021, 04:33:53 PM
thanks for sharing your methods, they certainly seem to work for you and it's looking awesome (as your work always does).
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: jeroen_R90S on March 02, 2021, 06:28:24 PM
Looking great!
I see I'm not the only one who uses those square Revell Aqua paint containers in such a way!
I even keep the empty ones and put varying degrees of "ballast" (nuts, stainless balls etc) in them to use them as you use the Humbrol tins. :)
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: RAGIII on March 02, 2021, 11:14:52 PM
You have taken a giant step forward Stephen. The clever ways you devise to square things up is always entertaining...and gives one great ideas! The aircraft really looks outstanding as a biplane. The rigging is looking outstanding.
RAGIII
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: kensar on March 03, 2021, 12:39:13 AM
As the others have said, thanks for sharing your methods.  I always find it interesting how others put models together.
I also have my Mk I jigs - machining blocks.
This plane is interesting in that the radiator is suspended on wires.

Looking forward to seeing more progress. (Be sure to bolt that seat down well before giving rides!)
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lone modeller on March 08, 2021, 10:20:27 PM
Evening All,

Thanks Frank, Alexis, EBF, Jeroen, Rick and Ken for the kind comments - they are much appreciated.

Frank: I have shown my Mk 2 and 3 jigs in other build logs on this site, but at the moment I have not had the need to build a Mk 4 variant. I will let you know when I do!

Jeroen: I had not thought of adding weight to empty paint pots - that is a really good idea and as I have a couple of pots which are nearly empty, I will keep them ready for future use.

I have added the boom struts to the rear of the model - these were pre-painted and are held with CA:

(https://live.staticflickr.com/65535/51015656851_cb81d0335f_c.jpg) (https://flic.kr/p/2kJ5zqx)

(https://live.staticflickr.com/65535/51015749197_60b0f98c34_c.jpg) (https://flic.kr/p/2kJ63SH)

Next up was the undercarriage. The layout of the main undercarriage was very similar to the Maurice Farman Longhorn, so I used a similar method of construction. The skids were pieces of 30 x 40 strip which were bent at the ends by holding the end in a pair of tweezers and twisting the plastic steadily until the desired shape was achieved. Holes were drilled to take the struts and the three uprights cemented into place. While the cement was still soft I placed the strut ends into the underside of the model and adjusted the struts to the correct angle. The bracing struts at the side were added quickly to keep the whole sub-assembly square and upright. When this had dried thoroughly I repeated the construction on the other side:

(https://live.staticflickr.com/65535/51014930893_0246733724_c.jpg) (https://flic.kr/p/2kJ1RC2)

(https://live.staticflickr.com/65535/51015749077_e215a4921c_c.jpg) (https://flic.kr/p/2kJ63QD)

Axles were CA'd to the skids: these were cut from a paper clip:

(https://live.staticflickr.com/65535/51015656816_6d7f7d655c_c.jpg) (https://flic.kr/p/2kJ5zpW)

The wheels, (not illustrated here), have tyres made from 60 thou rod which has been wound around a paintbrush handle and held in boiling water for about 10 seconds. The diameter of the brush handle is smaller than the finished tyre so that I can open the coil of plastic and hold it around a disc of card. I cement the ends of the rod making sure that not too much cement gets to the disc. When the joint has set I carefully release the tyre from the disc with a sharp scalpel blade The spoked wheels will be made from an Eduard PE set but I am having problems making these up at the moment - hence the lack of a picture.

The tail skids were a rather complex structure. There is a drawing in Flight magazine which shows them in detail, but I have had to simplify things a little in order to be able to make a viable structure which will be sufficiently robust. Basically it consists of the skid (filed and bent plastic strip), struts (rod), and side brackets (thin strip). The skid has been CA'd to the lower boom but in reality it should be free: practical considerations necessitated my field modification. I had drilled holes in the ends of the skids so that I could thread some wire through them - this makes the spring and wire attachment to the top of the tail unit. The remainder of the support was straightforward - put in the vertical strut between the skid and boom, side strut next and finally the two strips on each side of the skid. I had to work quickly to make sure all lined up properly before the cement set on the styrene. Finally the spring/wire was CA'd to the tail unit.

(https://live.staticflickr.com/65535/51015656886_afa08f9dc7_c.jpg) (https://flic.kr/p/2kJ5zr9)

(https://live.staticflickr.com/65535/51015749042_2bc172dd4f_c.jpg) (https://flic.kr/p/2kJ63Q3)

With the bulk of the construction now complete I am working out a rigging plan. There are rather a lot of wires left to add to this model, and I want to try to ensure that I do not knock any existing ones and have to replace them, so the order of addition matters a bit. They are also going to take a little time to fix into place.....

Thanks for looking.

Stephen.
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: kensar on March 08, 2021, 10:56:25 PM
Stephen, this is a very complex craft you've taken on and your build log is very informative.  Thanks for sharing this with us.
Was there a 'suspension system' on wheel assembly?
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Alexis on March 08, 2021, 11:33:13 PM
Really nice progress Stephen ! I'm already looking forward on the next up-date ...you rock Stephen  :)



Alexis
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: RAGIII on March 09, 2021, 07:18:50 AM
Awesome update Stephen! Your work on the skids and tail skid is excellent. Really looking superb!
RAGIII
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Early Bird Fan on March 09, 2021, 05:49:31 PM
awesome work as ever
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: RLWP on March 09, 2021, 07:07:21 PM
Stephen, this is a very complex craft you've taken on and your build log is very informative.  Thanks for sharing this with us.
Was there a 'suspension system' on wheel assembly?

I would expect to see the axle 'tied' to the skid with Bungee cord. Stephen?

Richard
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lone modeller on March 22, 2021, 07:25:39 AM
Evening All,

Thanks Ken, Alexis, Rick, EBF and Richard for dropping by and leaving your constructive comments: they are much appreciated.

Ken and Richard - I did indeed tie the axles to the struts as explained below - I had not done so when I made the last post.

After a bit of a struggle, (time, not complexity of task), I have finally finished the charabanc. From a construction perspective this meant that I needed to add the bungee cords to the axles and skids - they were made from dark grey thread which I would around a couple of times and secured with CA. Then I could add the wheels which are wire wheels from Eduard with 40 thou rod for tyres. The propellor was carved from hardwood strip which I inherited from my father many years ago, the control horns, pulleys and a klaxon, (motor horn), which was mounted on the port side of the fuselage! Then it was time to complete the rigging, using rolled copper wire.

I will describe my method for rigging pushers in full here in case some of you think that it is more difficult than it is in reality. If a systematic method is used it is straightforward, if time consuming.

On this model I rigged the tail unit and the fore-aft gap between the cabane struts first, because later these are not very accessible. I also rigged the rear bays of the inner struts for the same reason. Then I rigged the fore-aft gap between the wing struts, followed by the rest of the rear of the wing bays. Next were the boom bracing, followed by the undercarriage and underside control wires including the aileron and elevator wires. I also rigged the upper wing overhang supports and the lower boom anti-drift wires. These latter make a cross between the rear of the booms and then run to the rear struts of the lower wings. Next were the rudder control wires from the horns to the pulleys on the wing struts, followed by the elevator wires to the rear struts. The remaining anti-drift wires for the upper part of the booms followed. With the rear of the model rigged I turned to the front. First were aileron wires on the upper wing, followed by the control wires for the rudder and elevators: these crossed from the rear struts to the front cabanes and then to the control horns and rudder bar at the front of the nacelle. Now I could complete the front strut bracing followed by the aileron control wires from the nacelle to the lower and upper wings were next and last were the front anti-drag wires. If that reads like a large number of wires then you will have read correctly! There are a lot of them, even for a pusher. I did not count them all but I think that it must be in the order of 150 - 170 in total (There were 190 on the Maurice Farman Longhorn which had slightly more than this one).

The windscreen was made from 10 thou acetate which I CA'd to the top of the nacelle. However it went a bit foggy when I bent it so I will have to replace it later - I left it in place to take the photos.

(https://live.staticflickr.com/65535/51056708406_4abc96321b_c.jpg) (https://flic.kr/p/2kMGYBY)

I will post more images in the finished models section later when i have completed some historical notes.

Thanks for looking.

Stephen.


Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: Early Bird Fan on March 26, 2021, 03:26:45 AM
i'm loving that LM, as usual a first class build from you
Title: Re: 1/72 Grahame-White Type X Charabanc
Post by: lcarroll on March 26, 2021, 10:10:26 AM
Magnificent Stephen! I'll save my further comments for your Completed Models entry later, and I'm very much looking forward to seeing the photos!
Cheers,
Lance