Anyone made an exhaust flapper for one of their models?

[JimDobson]

Anyone made an exhaust flapper for one of their models?

Do you have any photos you can share?

 

[Sprocket]

This is the one I made for my version of the Zero-6 ( picture to the left.)
Look at Mark's Holt 75. He made a really nice one from GBritnells drawing.
Mine ended up feeling a little clunky, but it was probably 10 years ago I made that, and I like to think I'm better at it now...
Doug

 

[Tim Wescott]

I can't help but think that starting with an oil fill cup cap would be a good idea.

http://www.abmtools.com/product/spring-lid-oil-cups-and-elbow-oilers/

 

[JimDobson]

This is the one I made for my version of the Zero-6 ( picture to the left.)
Look at Mark's Holt 75. He made a really nice one from GBritnells drawing.
Mine ended up feeling a little clunky, but it was probably 10 years ago I made that, and I like to think I'm better at it now...
Doug

G'day Doug and thank you. Not knowing much about these at all, I take it that the part circled below from your pic is a counterbalance?

 

[JimDobson]

I can't help but think that starting with an oil fill cup cap would be a good idea.

http://www.abmtools.com/product/spring-lid-oil-cups-and-elbow-oilers/

Thanks Tim

 

[Sprocket]

Yup. too heavy for the exhaust without it I think. Just used a WAG* for the size, it looked right and it worked. Also, without a little counterweight, they close too fast and bounce.




*wild ass guess

 

[JimDobson]

Yup. too heavy for the exhaust without it I think. Just used a WAG* for the size, it looked right and it worked. Also, without a little counterweight, they close too fast and bounce.
View attachment 122029



*wild ass guess

Cheers it looks exactly like what I would like to try to make.

 

[Stefan-K]

Anyone made an exhaust flapper for one of their models?

Do you have any photos you can share?

Here are 2 photos of my flapper which i have on my Lil`Brother and the Plan to make it. Don´t know anymore where i have the plan from. I believe its from the Tiny IC build log, but i`m not sure... anyway it works good and is nice to watch.

 

[Brian Rupnow]

You will find that on a small i.c. engine, these things rattle like Hell. On a big truck or tractor you don't hear the noise they make, but on a small engine they are very noisy.

 

[gbritnell]

Here is the drawing I made for my Holt engine. I made mine from aluminum but it could be made from anything, brass, steel. Mine doesn't make any perceptible noise while the engine is running.

 

[el gringo]

could someone s'plain to dummie the use of a flapper
Ray M

 

[dnalot]

could someone s'plain to dummie the use of a flapper
Ray M

It keeps rain and debris out of exhaust when engine is not running.

Mark T

 

[el gringo]

It keeps rain and debris out of exhaust when engine is not running.

Mark T

thank you Mark, that would be the same as the beer can (photo available on request) I manually place on my Earthmaster tractor to protect the valves from rusting.
Ray m

 

[JimDobson]

Thanks all, appreciate the drawings and the replies and thoughts very much.