PIREP on new heat muff

[chrishalfman]

Maybe this isn't a 'new' heat muff, but I can't determine if any of the existing posts are for this or the soup can style heat muffs. I can?t even find it on Van?s site with the part numbers. This thing was in my firewall forward kit I just got the other day and was wondering how well it worked and if you would still recommend a soup in can series with it or if it is pretty good on its own. Or, if you did any other mods with it. There are both cabin heat and carb heat outlets on it.





Thanks!

Keywords for the next person trying to find this:
EX-00001
EX-00008
OP-54

[Rupester]

That looks really GOOD. I've never seen a heat muff like that before. It looks to be at least three notches better than the old cheapo standard.

[Flying Scotsman]

Where does this go? Over the two pipes underneath on a cross-over system?

Some pics of the installation would be nice to see...this does look good, compared to the soup can...

[rvbuilder2002]

Originally Posted by Flying Scotsman

Where does this go? Over the two pipes underneath on a cross-over system?

Yes, but it will only work on the exhaust system it is sold with.

I have been flying a pre-production prototype version on my airplane for about 2 years and it works very well. Produces a good RPM drop with carb heat applied, and heats the air quite well for cabin heat.

[scsmith]

Looks really good, but also looks kinda heavy. Actually, it looks really heavy.
Is it stainless steel, or aluminum?

[rvbuilder2002]

Originally Posted by scsmith

Looks really good, but also looks kinda heavy. Actually, it looks really heavy.
Is it stainless steel, or aluminum?

It is aluminum.

It is heavier than a single Robbins style muff but not to bad.
Performance wise, think of it as replacing 2 1/2 - 3 Robbins style muffs for equivalent performance.

[chrishalfman]

Thanks for your reply, Scott! It looks like it should work pretty good-have both pipes to add heat and the baffles probably slow the air down and give it a good tumble as it passes through.

I'm guessing you didn't put anything in it (especially if you use the carb heat). As in-I've heard people mention putting stainless chore boys in the old style to slow down the air and give it more surface area to transfer heat. It's a well-made piece, but then it needs to be 'air tight' to some degree.

Steve-I'd post an install picture, but it'll be a while! Still finishing the canopy.

[DaleB]

Chris, any time you feel like taking a break from all the canopy work, feel free to come on over and help with my wings and tanks. The beer's cold. I'll even return the favor.

[rvbuilder2002]

Originally Posted by chrishalfman

Thanks for your reply, Scott! It looks like it should work pretty good-have both pipes to add heat and the baffles probably slow the air down and give it a good tumble as it passes through.

I'm guessing you didn't put anything in it (especially if you use the carb heat). As in-I've heard people mention putting stainless chore boys in the old style to slow down the air and give it more surface area to transfer heat. It's a well-made piece, but then it needs to be 'air tight' to some degree.

The baffles are designed so that the air flow has to cross from one side of the pair of pipes, to the other side, three times, as it passes through the heat muff.
As a result, nothing else is needed inside.
The way it fits together on the pipes, it is very air tight.

[tx_jayhawk]

Anxious to see a picture of this one. Seems it could solve two problems on the airplane (limited heating and limited carb heat).