Hi all,
I have a buddy that is looking at a very nice Kitfox model 3 that has been upgraded with 4 wings, 4 flaperons, and 4 flaperon mixture and baggage compartment. To do the modification to model 4 flaperon mix and baggage, it looks like 3 tubes have been cut out. I emailed Debra and she sent me a PDF of a "Denny retrofit" that I guess Dan Denny put together himself. It involves cutting out some tubes in the baggage compartment area but we can't tell specifically if the correct tubes were cut (probably so). The owner is not the one that made the modifications.

First, is anyone familiar with this Denny retrofit and could tell us if it was done correctly. Also, what impact does this have on the airframe integrity? See attached photos.

Second, the owner said the previous owner told him that, because of the modifications, it should be a 1200 max gross aircraft now. Does anyone have any thoughts on this? It seems to me like there is a still a lot of the 3 fuselage left such as carry thru spars, smaller diameter tubing, smaller empennage, etc. We don't think the gross weight change was done officially. If it should be 1200, what's the correct method of changing the gross weight to 1200? Put it back into Phase 1? Can a non-builder do this?

Thanks!

Brian
Model 4 Speedster