PAU Ultimate with a BME 110 Cooling/ducting cowl!

[Bat Fastard]

Does anyone have this combo? I am getting ready to finish this up and need good sound advice for installing the baffeling that WORKS. Pics would be nice.

I had this engine in a H9 cap and it would run around 300 degrees tuned somewhat rich. The baffeling was from the openings in the cowl to the front of the cylinder only and the openings were a little too small I think.

Any info would be appreciated.

BF

[thumbs1]

	Quote: Originally Posted by Bat Fastard
	Does anyone have this combo? I am getting ready to finish this up and need good sound advice for installing the baffeling that WORKS. Pics would be nice. I had this engine in a H9 cap and it would run around 300 degrees tuned somewhat rich. The baffeling was from the openings in the cowl to the front of the cylinder only and the openings were a little too small I think. Any info would be appreciated. BF

I've been flying a PAU Ultimate/BME 110 for about three years. The performance is excellent and the only reason I fly my Comp-arf/BME 110 more often is because I'm sometimes just a little too lazy to setup a bi-plane.

I've always used baffling for engines mounted inside a cowl with good results. The baffling for my 110's is copied from a picture of the Ultimate Chip Hyde used at the last TOC.

http://www.scaleaerobatics.com/gallery.aspx

Overheating has never been a problem, even with the 100+ temps we have in Las Vegas. I don't know the cylinder temps, but there has never been a problem with the engine losing rpm due to excessive heat.

See the atttached pictures, I'm in the process of removing the tuned pipes and reinstalling the canisters, the pipes added too much tail weight.

[Bat Fastard]

Thanks a bunch Thumbs! It looks simple enough, I think I'll give it a try.

BF

[thumbs1]

Even after building several baffles, it still takes me about 4 - 5 hours to do it right. You need to make sure the baffle fits perfectly against the sides and top of the cowl so air doesn't leak around the baffle instead of going through the fins. I also use silcone to seal the top of the baffle where the ignition wires pass through.

[Bat Fastard]

I think I'll make it a little small and then make another one that fits inside of the cowl so that they overlap a little. Should make it a little easier to do. What do you think?

[thumbs1]

That's what I did around the corners, it looked ugly but most of the baffle is not visible when the cowl is on.

[flyin woodbutcher]

	Quote: Originally Posted by Bat Fastard
	Does anyone have this combo? I am getting ready to finish this up and need good sound advice for installing the baffeling that WORKS. Pics would be nice. I had this engine in a H9 cap and it would run around 300 degrees tuned somewhat rich. The baffeling was from the openings in the cowl to the front of the cylinder only and the openings were a little too small I think. Any info would be appreciated. BF

what you baffling for any way? Aint got no fins to cool it wit.fg43

[Bat Fastard]

	Quote: Originally Posted by flyin woodbutcher
	what you baffling for any way? Aint got no fins to cool it wit.fg43

Listen, just because it dont have your favorite brand name on it doesn't mean it wont work. I just need to figure out how to keep it cool. If you don't have anything constructive to say then keep your pie hole shut. Lick whats next to the moon:9:.

[flyin woodbutcher]

	Quote: Originally Posted by Bat Fastard
	Listen, just because it dont have your favorite brand name on it doesn't mean it wont work. I just need to figure out how to keep it cool. If you don't have anything constructive to say then keep your pie hole shut. Lick whats next to the moon:9:.

Damit boy, got your pantys all in a ruffle.:fencing: You acting like a 3W boy or something. You know, cant take a little ribbing.

[Bat Fastard]

Dats rite! :Banane36:

[jongurley]

No DA????????

[RTK]

Here are a couple of pics of the way I had my 110 in a comp-arf.
It is hard to tell but there is a piece on the top part of the cowl about mid cylinder and a lower plate right at the lip of the lower cowl which extends to the cylinders, then goes around the sides to the curved back plate.
The gray curved piece slides behind the top baffle
Very simple but very effective. Oh I always put a lip on the exit areas to create a low pressure to aid in drawing out air.
It runs cool as a cucumber

[Bat Fastard]

	Quote: Originally Posted by jongurley
	No DA????????

I tried to sell it, no one will buy it. ? Wonder why........
I might as well try to use it. If I can keep it cool I'm sure it will do the job fine.

[Bat Fastard]

Does anyone know what is a SAFE temp for the 110 to run at? Is 315 too hot?

[RTK]

Is that temp while flying or after landing???