EW Aero V8 double size

[hdpreez]

Hi
Didnt have much time over the last two weekends but managed to do something yesterday and today.

I finished the con-rods and the big end shells. Not too happy with the result of the lapping, i think the grinding paste I have is too coarse. I have to finish them before i can final machine the crank.

The crank easnt too bad to machine, I expected worse after reading the previous discussions on similar projects. I marked the centres on one end of the material and scribed two lines along the length at 180 deg apart. I then made an eccentric bush with the same throw, split with a hacksaw on one side and used it in the 3 jaw to hold the other end of the crankshaft blank. Hope it makes sense with the pics below. I think doing the final turning will be more difficult though

Henk

 

[canadianhorsepower]

Henk, that is looking sweet!! Much better than my model ... lol

Thanks for mentioning the wire brush too. I had almost forgotten about the finish you can get from a simple wire brush, and you're right, it does look like it's cast.

If your want to try something different. Brush your aluminium piece
with a small Brass brush in a liniear patern them take a big carpenter's
pencil and cover you hole piece with the lead.
Then simpy very light sanding with a scuff pad or lightly brush it with
the brass brush again
sure your going to like it

 

[trumpy81]

Henk, that crank and the rods look great. I look forward to hearing this run

Luc, silly question, but what is the benefit of the lead pencil? ... I'll have to try this of course ... lol

 

[canadianhorsepower]

[
Luc, silly question, but what is the benefit of the lead pencil? ... I'll have to try this of course ... lol[/QUOTE]

Andy, using a brass brush will make very smal scratch in your aluminium,and the pencil lead will stick in their
and give it a darker color like cast

 

[BronxFigs]

Last postings back in February......

Nothing new? Please don't tell me that this is the end!


Frank

 

[hdpreez]

Hi Frank
No its not the end. All components for the engine are complete, except for the carbs, intake and ex manifolds. Assembly is a bigger challenge than i anticipated.

Had some problems with the rings, they break when i fit them, cant seem to get it right. Thinking of making steel rings in stead of CI ????

Anyway, i decided in April to finish another project first. I started this in the beginning of 2012. It is a 7.25" gage DFB. The scale model was built from an original build GA drawings and some photos of the real thing. I think it came out nice, runns well as well.

A friend posted some pics on flicr of the maiden run. see http://www.flickr.com/photos/alfav8/sets/72157637770092664/

Its coal fired BTW.

Will spend some more time on the V8 soon.

 

[BronxFigs]

Thanks for the update. Take your sweet time with the V8. I flit from one thing to another, too. Short attention span does this for me, and too many diverse hobbies.

Looking forward to your V8 Whittle on steroids.


Frank

 

[BronxFigs]

Just curious, and confused....is this "WHITTLE" V8 Aero engine basically the same as the "CIRRUS" Aero engine? Superficially, they have the same "look". Is the "Cirrus" Aero engine an Inline 4-cylinder, or was there a V8 model also built? And what about the De Havilland "Gipsy"? What are the major differences?

I see photos of the straight, 4-cylinder Cirrus engines mounted in both the heads-up and heads-down attitude....how is this possible to do without flooding, oil control, etc? It can't be just a matter of turning an engine from one position to another position, by rotating it 180 degrees....or, can it? Are there some kind of baffles built into these engines to control the fluids?

In real world, combat planes, I imagine that the planes did have to fly upside down for evasive moves, but what happens to the fuel, and oil inside these engines? What ever the answers, I doubt that what takes place inside an operating, full-scale engine, would be a concern for model engines?

I am just taking some wild guesses, so please help me out.


Frank

 

[barnesrickw]

At the museum I volunteer at we have some Continental engines. One is an aluminum v-12, air cooled 1,200 hp tank engine. It looks a lot like the model you are building. If I ever gain the skills, I would love to try, but would be more excited to see the more talented here try one.

 

[barnesrickw]

At the museum I volunteer at we have some Continental engines. One is an aluminum v-12, air cooled 1,200 hp tank engine. It looks a lot like the model you are building. If I ever gain the skills, I would love to try, but would be more excited to see the more talented here try one.

Oops, it's only a little over 700 hp.

 

[BronxFigs]

Anything new with the double-size Whittle V8?


Frank

 

[BronxFigs]

A great engine, and twice the size! Is this all there is ??????


Frank : (((