Stretch fuselage or not.

[Laverne 1]

I have finally settled on a Rotax 912UL - 80hp. 

If I'm installing this in a Avid model "A" do I need to stretch the tail out. ? The guy I bought it from said that he was going to do that.

 

[1avidflyer 1983]

The A model was only supposed to be 850 gross weight.  While it would be a rocket ship with a 912 if built light, you won't have much usable load.  Stretching the fuselage will help the CG, but won't strengthen other light built/weaker areas of the fuselage.  Sorry if I don't sound encouraging.  JImChuk

[Laverne 1]

Thanks again Jim.

I sounds like I would gain much by stretching it.

 

 

[flywise 169]

Thanks again Jim.

I sounds like I would gain much by stretching it.

 

 

Hey Laverne, I don't think you got the idea right.

Originally the model "A" fitted with a lightweight 2 smoke can 'just' take 2 underfed adults - no luggage. If you fit the 912 you will have a one seater for a 185 pound adult + a few ounces of luggage....and if you stretch it (added weight) you certainly will have to be super light human and without luggage. Any modification you do (T3tail gear/big tires/hyd brakes/lots of instruments etc) will decrease useful weight too.

Hope that shines light in the mud...