I finishing up my 84" WH Edge with a G62 and hope to maiden it this weekend or early next week. I want to wait for a Bisson side mount muffler which won't be available until early August, so I'm planning to use the stock Zenoah muffler and fly without the cowl. I don't think there is a problem doing this but just want to make sure. Comments?

The reason for the side mount Bisson is I've heard it is a tad quieter than the wrap around, provides a little more power, and is 3 oz lighter. If someone has another suggestion, I'm open.

Chuck

NOT A PROBLEM AT ALL AS LONG AS YOUR CG IS CORRECT I FLEW MINE WITHOUT A COWEL AS IT WAS THE ONLY WAY TO TEST AND TUNE ENGINE AND I DID NOT WANT TO TAKE MUFFLER SPINNER PROP AND COWEL 5 TIMES IN AN HOUR IT FLEW FINE .

Having used both I think the wrap around is quieter, but the side mount has a couple of more rpm. All trade offs one way or the other based upon what you can deal with. I've flown all my Wild Hares with and without a cowl without issue. The open fronts have been closed and open without any noted differences. Flying without a cowl does make a significant difference in the way the plane appears on approach and alters your judgement a little. Sure makes it easy to access the needles, tho.

You might check Chief Aircraft, they carry the Bisson side mounts for Zenoahs.

SitNFly,

I see they sell it, I check with them tomorrow to see if they have it in stock.

Thanks
Chuck

If you would like to get some more RPM's, I would also cut the tips off of the muffler with a dremel.

You will be please how much better it flies with the cowl than without.

SitNFly,

Thanks for the tip on Chief Aircraft. They have them in stock and I just ordered one.

Chuck