hey folks, looking for some advice on baffles on my PRC sbach with dle 111.

my previous baffles (the black ones) are still ok to use if i wanted but i was playing with different ideas.

tbh the cowl shape doesn't lend itself well to doing this but hey ho, cracking on.

so there is a pic of one side mocked up. basically there only way for air to get out is through the fins. there are no gaps anywhere else and the cylinder is full enclosed.

so can anyone suggest if the new one will be better or can suggest something. if you could please show pics. remember this cowl isn't as easy to do as say an extra etc.

cheers

I've seen this configuration once or twice up here, and I have to ask, what about the fins on the bottom?

That baffle looks good to me....that is actually the correct way to do it and how full scale baffling is done

Impulse, when this style of baffling is use air is taken into the opening and has no place to go but down through the cooling fins and out your air exit. So the bottom of the fins recieves plenty of cooling as well

This lightweight craft foam works great. I got mine in a 4 layer piece and just seperate it to 1 1/4" piece,also use it behind for support also. Painted with Pactra Aero-Gloss Hot fuel proof dope/jet black

Any pics of the exit area?

That looks fine ..I do something like that , just us the Creative foam ..its light , easy to work with , and can touch the cylinders ..

I am very impressed with what I see here

Guys I wish I could get that creative foam but you cant buy it in uk.

I have bought a few diff types of craft foam and none of them like heat.

If anyone has a source for the foam please let me know.

So the general feeling is I should go with the enclosed option and ditch the current black one?

Cheers

it's actually Creatology brand foam

That stuff looks like Extruded Poly Ethylene.
There is also a foil and EPE version that is heat insulating or reflective (depending on whether you want to keep heat in or out)

Originally Posted by KTS

I am very impressed with what I see here

Good ol' Herbrandson. I bet Ralph knows this engine? Cooling shroud and straight through exhaust stacks.

Originally Posted by flatspinjim

Any pics of the exit area?

there ye go! i'm going to add louvers to the opening to help some more.

Originally Posted by pe reivers

Good ol' Herbrandson. I bet Ralph knows this engine? Cooling shroud and straight through exhaust stacks.

Yup, makes a 220 + mph race engine when converted to glow and boost ported..'weighs almost 14 lbs converted..Hard to break unless run too lean..Don't ask...
There's one in here, completely baffled..Can't even see the cylinders under the cowl, complete control of temps..