Currently building a H9 AT-6 and need some help deciding in which direction to mount the engine. I know for sure I do not want to go inverted. Are there any advantages or disadvantages between one way or the other? What's the rule of thumb again between the fuel take and carb height centerline? Engine is a TT91FS.

cruz, I assembled one of these in July for a friend, and I mounted the motor at about 45 degrees down and to the right. This allowed the muffler to extend out the bottom and a little left. We used a Magnum .91 4 stroke. and the plane flies great. The only weak point we found was the landing gear wire is a little weak but not a big problem. I think theres a post here from SHOK about it.

Thanks Bear,

So looking at the engine from the front with the plane sitting on it's gear, the glow plug is to the left? How far forward did you mount the fuel tank, was the rubber cap slighty through the firewall? Thanks for the tip on the landing gear. On Monday, I ordered the upgraded 3/16 gear from 'Robart'. Hopefully, they should perform better vs. the stock gear.

Yes looking from the front the glow plug is down and to the left. The tank is as far forward as I could get it. With the magnum, the plane balanced perfect.

Thanks pal. How's the weather up there? lol Big time wind down here.

Weathers been good. I delivered a Hanger 9 182 yesterday. But we couldn't fly it because of thunder storms. I lived in SA from 1986 to 1990 loved it, but it wasn't a real good town for aviation mech,s at the time. Still a a great place to live tho.

Yeah, we had a lot of rain yesterday as well, all morning until about 1400. Funny you used to live here in SA, I just moved down from Dallas about 2 years ago. I lived there from 96-2001. Lived in far North Dallas just off the tollway.

Did you use the stock engine mount on your friends plane? My TT91FS won't fit on it. I'm using my back up sig mount. I'll only be able to use one of the factory drilled mounting holes. I'm going to have to drill out some new ones. Did you have to do the same as well?

thanks again, take care,,,,send better weather down South.

I used the stock mount. The magnum is the same size as the os. The hard part was fitting the cowl with minumum cutouts. I musta had the motor on and off 15 times.
I lived in NE SA between O'Conner and Judson right off I35.