WNW AEG G.IV (Late) 574/18 Canadian Aviation and Space Museum

[lcarroll]

von Buckle,
     I would add oil but I'm not sure where and it would probably all flow out of that nice pair of holes I carved in it!
Steve,
     I don't have the Gotha book however his AEG Special No. 4 has detailed side profiles that show a sight glass on the right side (rear) and no port at the front, the left side with just the open port. The sight glass is labelled "Oelschauglas". This sight glass is not portrayed on the Kit engine and the Kit engine also has the forward port impression on both sides contrary to the profiles.I wonder what version of PC.10 it is?? 
Cheers,
Lance

   

[krow113]

I wonder what version of PC.10 it is?? 
lol
 Now your getting it!
Dont worry they were prolly trying out a single hole as too much oil flew out 2 holes!
Although I dont see any oil stains in the pics.....
I'll be getting those pic descriptions translated too as I wanna know what is being described.

[GB]

From what I can see, the sump is not like that of a car engine - ie, oil sits at the bottom and is drawn up via a pump to feed the moving components (wet sump). I would suggest that it is a dry sump type where oil is contained differently. This means that it is a dry sump type of set up which virtually eliminates oil starvation which you can get with a wet sump in certain conditions - ie high G force loadings. With a wet sump, oil could be 'forced' to one end of the sump under G force and with no oil available at the pick up, starvation resu;lts with inevitable damage to the engine.

Gary

[Alexis]

Yup , there is a few bits for those engines Lance . Should keep you busy for a spell . Looking forward on seeing how these turn out with the added bits .




Terri

[uncletony]

From what I can see, the sump is not like that of a car engine - ie, oil sits at the bottom and is drawn up via a pump to feed the moving components (wet sump). I would suggest that it is a dry sump type where oil is contained differently. This means that it is a dry sump type of set up which virtually eliminates oil starvation which you can get with a wet sump in certain conditions - ie high G force loadings. With a wet sump, oil could be 'forced' to one end of the sump under G force and with no oil available at the pick up, starvation resu;lts with inevitable damage to the engine.

Gary

These were very much wet-sump designs. The oil pump (& pickup) sits at the bottom of the sump just like in your family chevy. The oil reservoir tank is provided because of the enormous oil loss inherent with exposed valve train, etc.

[krow113]

My last word here on the engines regarding the holes in the front of the lower crankcase, they are holes as its pretty obvious that the carb is fed air from the lower crankcase. There must be some serious sealing and baffle plates as I cant find any evidence of oil presence there.
Also there are lots of pics in other WNW kits ,as these engines were in a number of planes.

[uncletony]

My last word here on the engines regarding the holes in the front of the lower crankcase, they are holes as its pretty obvious that the carb is fed air from the lower crankcase.

Yes, that is correct. All these engines drew the air thru/past/over the sump to simulatenously warm the air (to prevent/ forestall icing) and to cool the oil. Old Man Porsche knew his sh!t. (the Benz IV & Merc D.III and many followers were all "inspired" by the A-D 6)

[lcarroll]

Thanks, all, for the tremendous and informed response. I'm going with the "open holes" for the breather ports and have just added the sight glass to the right rear location on the sump portion of the engine. Perhaps I should have gone with just the single hole however, based on a photo forwarded by a Member in a PM where you can see the background on the far side of the sump it looks good to me. 
Cheers,
Lance

[GAJouette]

 Lance,
Awesome attention to the many details my old friend. As always your build threads show the highest levels of skill and craftsmanship. Looking forward to more!
Highest Regards,
Gregory Jouette

[lcarroll]

Greg, old Buddy, nice to hear from you and Thank You for your very kind comments! I'm pecking away at the engines and hope to enter another update soon.
Cheers,
Lance

[Scrodes]

Wow Lance!

Phenomenal looking build! I'm glad you've managed to use the wood grain template - it's always hard to know what you 'string baggers' will find useful!

Out of curiosity, what did you use for glue on the HGW harnesses? You really hit the nail on the head regarding how fiddly they are, but I much prefer them to the RB equivalents. (a fact I forgot when ordering a set for the bent-wing bird)


Cheers!

Matt

[lcarroll]

Thanks Matt! The HGW Belts were assembled with Medium CA, I prefer to do most glue joints with it and work around it's fairly fast setting tendencies. (I like the RB grain stencils however like weathering I find you can easily over do it, less is better in this case.
Cheers,
Lance

[jeroen_R90S]

Looking great so far, and those Taurus parts both look fantastic, and tiny!
As regards to the labelling, I always thought the DIV (with out the a) was an earlier inline 8 cylinder engine somewhat derived from the DIII? Apparently it wasn't much of a success. I remember cursing  Roden somewhat for not including them for the G.II option in their 1/72 Gotha G.II/III! (not that they can be seen anyway....)

Jeroen

[lcarroll]

Jeroen,
    Thanks for looking at her and for your welcome comments. I've not seen any references to the 8 cylinder theory you mention wrt the D.IV engine version however in my experience Wingnut Wings does their "homework" extremely well so the D.IVa versions for this Kit are no doubt correct. In the Albatros Publications Data File #51 Peter Grosz writes that the G.III version of the aircraft carried two D.IV engines of 220 HP, not 200 as stated elsewhere in references and that the D.IVa engines were chosen for the D.IV Aircraft due to failures that plagued the earlier D.IV engines. The aircraft I'm modelling here arrived in Canada in pieces post war and over the next 4 or 5 decades it's two D.IVa engines disappeared! The reconstruction has (incorrect) D.III's installed.
Cheers,
Lance

[lcarroll]

Ha!! There I go again Justin, too deep in the forest to see the trees! I never thought of checking out Wiki, thanks for this.
Cheers,
Lance