Gallery, Projects and General > The Design Shop

Rotary Engine Con Rod Crank Pin Assy

<< < (3/6) > >>

sbwhart:

--- Quote from: bogstandard on December 05, 2009, 03:55:03 AM ---John,

What I am trying to get over, on the original plans, it calls for something similar to a knife and fork arrangement on the big end, but in this case, two conrods are offset to each side of the main rod, using full length rods with a common crank pin,

--- End quote ---

Thats what proposal at 4 is.:- all con rods will rotate around a common crank pin centre line as original design.

Cheers

Stew

John Hill:
Stew, I think your cranked rods are a good way to go as it is clear from John B. Standard's GIF that the geometry is warped a bit by using the king rod approach.  Obviously Messrs Pratt and Whitney know how to get around that! :coffee:

Your cranked rods will become a challenge when you go on to your 9 cylinder version! :lol:

sbwhart:

--- Quote from: John Hill on December 06, 2009, 03:38:12 AM ---
Your cranked rods will become a challenge when you go on to your 9 cylinder version! :lol:

--- End quote ---

Thanks John

I was thinking of a 16 cylinder Job  Like this. http://www.enginehistory.org/bristol_hydra.htm

I've watched this engine grow at model expos over the last few years.

this engine is a labour of love

Enjoy

Stew

NickG:
Stew,

I think yours is the best concept, everything on the one crank pin an no bush because you'll be having 3 ball races the same size. They'll just have to be small ones so there is no interference due to increased big end size.

Nick

sbwhart:
Thanks for your input chaps.

I'm going to try option 4 as this is only a three cylinder engine the cranked con rod should be OK with any more cylinders the degree of crank would become unworkable, I've got some small needle roller bearing that just mite do the job, but I've got to measure them up first and do the drawing to see what space envelope I've got to play with.

Cheers

Stew

Navigation

[0] Message Index

[#] Next page

[*] Previous page