Author Topic: Aviatik 30.40, 1/48, update 22.11.21 Finish  (Read 10057 times)

Offline Rookie

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Re: Spoked wheels, 1/48
« Reply #15 on: September 06, 2021, 09:50:22 PM »
Now you are Just showing off  ;D Seriously, that is amazing Frank! 
RAGIII

I totally agree with Rick.

You are a fast learner Frank, it looks superb!

Willem

Bughunter

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Spoked wheels and landing gear, 1/48
« Reply #16 on: September 07, 2021, 02:45:17 AM »
Thank you very much for your feedback to all of you, highly appreciated!

Out of curiosity, has anyone ever wandered over to a real aircraft and measured the diameter of the wire used for the spokes?
The used fishing line would be 2mm in real. I think that is ok, compared to a bicycle.
May be WNW has some detail pictures in the gallery and you can measure and compare against the diameter of the wheel? May be a wheel is open on museum pictures ...


Landing legs

Ok, nice wheels need nice legs!

So I made some legs from squeezed brass micro tube, and soldered them together with another tube below. All pinned. That was somehow straight forward.
The tricky thing was to connect the side with another bar! To get the right angles I put the upper pins into wood with some holes according to the plan.



So this is the final position ...



... here enhanced with a axle from browned nickel silver.



So this will be the gear on my next project, but it will be painted together with the fuselage later. After that the axle will be added with suspension.



Cheers,
Frank

Offline lone modeller

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Re: Spoked wheels and landing gear, 1/48
« Reply #17 on: September 07, 2021, 04:28:01 AM »
That is a truly masterful undercarriage unit Frank. I can appreciate the problem of getting the angle of the legs to the axle correct - problems like that are a real test of modelling, and as usual you have overcome the problem extremely well.

Stephen.

Offline RLWP

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Re: Spoked wheels, 1/48
« Reply #18 on: September 07, 2021, 05:11:48 AM »
I can't stop thinking about this  ;D
Out of curiosity, has anyone ever wandered over to a real aircraft and measured the diameter of the wire used for the spokes?  I find that and the actual diameter of rigging wires are always a bit of a mystery.

You can add in the lacing pattern. I was half joking when I asked earlier

Frank has gone for an acceptable pattern where the spokes cross once near the hub. I have a feeling actual aero wheel spokes at this time don't cross at all

The crossing is there to allow torque between the hub and the rim. Aero wheels don't have brakes so there is mot torque generated

If you check the wheels of sports cars they have very complex crossing patterns due to the engine and braking torque.

I think Frank has copied the wheels for the Crossley tender

Richard
Hendon for flying - the fastest way to the ground!

Bughunter

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Re: Spoked wheels and landing gear, 1/48
« Reply #19 on: September 07, 2021, 06:11:46 AM »
Wow Richard, as always, lots of knowledge and food for thought!
Thank you!
Frank

Offline ColonelKrypton

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Re: Spoked wheels and landing gear, 1/48
« Reply #20 on: September 07, 2021, 08:09:12 AM »
FYI: In my notes I found a couple of links to period wheels:



and



noted as:

 " still with 760 x 100 Excelsior tires mounted.

The 'F.K.' indicates Franz Krause of Berlin, one of the preferred wheel vendors. The 'II'
indicates that this wheel is for a Doppledecker with max weight of 1200 kg and a max one wheel side-load of 3600kg."

Unfortunately my notes are missing the source but I suspect that maybe something I found on the aerodrome forum.

Also of note, if you right click on the images and select "open in new tab", you will get the image without the photobucket watermak.


cheers, Graham

Offline Rookie

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Re: Spoked wheels and landing gear, 1/48
« Reply #21 on: September 07, 2021, 09:51:49 PM »
This is a Palmer Cord wheel (1500300) similar to the ones used on the Handley Page  V/1500.

Yet another spoke arrangement.

(Just to fuel the discussion.....  ;D)

Willem

Offline kensar

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Re: Spoked wheels and landing gear, 1/48
« Reply #22 on: September 07, 2021, 10:10:59 PM »
I've seen many different spoke patterns used on wheels.  Straight radial lacing was used even though it is the weakest lacing pattern.  For reference, modern bicycle wheels typically use a 32 spoke, 3-cross pattern with 2mm spokes.  Wheels used on these aircraft would need much more strength than a bicycle wheel, so the spokes are much thicker - looks about 3 - 4 mm base on pictures, and I suspect used more spokes, like 36 or 40 spoke pattern.  All depends on the weight the wheels need to support.

Offline kensar

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Re: Spoked wheels and landing gear, 1/48
« Reply #23 on: September 07, 2021, 10:22:09 PM »
As usual, great soldering work, Frank.
I saw on another post you were working on Austro Hungarian markings?
(I'm just going to keep prying   ;D )

Bughunter

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Re: Spoked wheels and landing gear, 1/48
« Reply #24 on: September 07, 2021, 10:46:08 PM »
A lot of interesting posts and information! Thanks to all.

I saw on another post you were working on Austro Hungarian markings?
(I'm just going to keep prying   ;D )
Oh, can't remember ... You mean the number with the white border? It's for a British future project!
But here - YES Sir! Austro - Hungarian is a direct hit!
Another hint: with a very interesting engine, not available by Small Stuff  ::)

Cheers,
Frank

Offline RAGIII

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Re: Spoked wheels and landing gear, 1/48
« Reply #25 on: September 08, 2021, 12:13:28 AM »
Your usual precision in soldering Frank. The gear and wheels look Fabulous!
RAGIII
"A man has to know his limitations": Harry Callahan

"Don't slop it on" Lynda Geisler

Bughunter

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Spoked wheels, landing gear and cowling, 1/48
« Reply #26 on: September 08, 2021, 06:17:56 AM »
Thanks Rick!


Cowling


The cowling was turned on lathe. Also drilled, milled and finally polished with a rubber stick.



There was a very nice and thin resin cowling in the kit, but I wanted real aluminum to be able to polish it.
And the resin has 5 cuts on lower side, but the drawing shows 7, looks also on the pictures like that.



Now it is clear, that this a Austro-Hungarian type and resin kit, so another comparison:



The new legs are much closer to the drawing.



Also in thickness:



Cheers,
Frank
« Last Edit: September 08, 2021, 06:24:34 AM by Bughunter »

Offline RichieW

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Re: Spoked wheels, landing gear and cowling, 1/48
« Reply #27 on: September 09, 2021, 12:06:07 AM »
Wow, Frank's moved up another level then! This is wonderful work, those spoked wheels are incredible. This is going to be a big Bughunter treat for the eyes. :)

Richie

Offline RAGIII

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Re: Spoked wheels, landing gear and cowling, 1/48
« Reply #28 on: September 09, 2021, 01:01:03 AM »
The cowling is Brilliant work!
RAGIII
"A man has to know his limitations": Harry Callahan

"Don't slop it on" Lynda Geisler

Offline RLWP

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Re: Spoked wheels, landing gear and cowling, 1/48
« Reply #29 on: September 09, 2021, 02:25:08 AM »
I'm thinking we should have a spin off thread on wire wheels. It could include tyres, covers and axle fittings

Richard
Hendon for flying - the fastest way to the ground!