stc for rotax 912 or 914 on 7 series champ

big champ · Post by **big champ** » Tue Aug 30, 2005 18:54

Does anyone know of an STC for hanging a rotax 912 or 914 on a 7AC?
Would that even be worth considering?

Ron Babos · Post by **Ron Babos** » Tue Aug 30, 2005 20:06

No, considering you can buy a normal, direct drive , air cooled aircraft engine for the same money. Redrives are not as user friendly as direct drive. A lot of people that flew the Katana's with the 912 Rotax did not like them, however they like the Continental powered much better. Here is my experience with them. They chatter like crazey at idle. The will increase and decrease rpm's on the engine much more with load changes on the prop than a direct. Just one more thing to screw up.
Ron

Nathan K. Hammond · Post by **Nathan K. Hammond** » Tue Aug 30, 2005 21:11

No STC out there for the Rotax.

But I say go for it, if it's something your comfortable with. Ron brought up some good points on why not to use one, but i'm sure theres got to be a pro somewhere. Nice thing is the airplane could be listed as EXPERIMENTAL. Then you could turn your airplane into a test bed for all kinds of other mods.

I always thought that 7 cylinder Rotec would be really cool on a champ.

nkh

mike newall · Post by **mike newall** » Wed Aug 31, 2005 06:02

Why on earth would you possibly want to change the quaint stutter of an A-65 into the frantic whine of a Snowmobile engine - Yeuch !

I changed the A-65 into a C-85 (0-200 similar) last year and I personally think it is about the best combination for the 7AC - great heater too !