The 55ax weighs 18.52oz o 525g with muffler. As against that, the 75ax weighs 26.46oz or 750g w muffler. For the 65ax data isint available with muffler but without that its 17.5oz (497g as compared to 405g or 14.29 oz for 55ax) and assuming muffler to be same as 55as, it would be about 650gms or 22oz. That is the reason for shift for preference from 75 to 65- its much lighter. With respect to the stresses, I have already had a hard langing due to deadstick and reinforced everything a couple of weeks back. I will fit a lower pitch prop (14x4) anyway of the 65.

With regards to my problems with the 55ax, thats another story. When I got it last year, my instructor decided to fly it without break-in inspite of me telling him to do the break-in first. Though we ran her rich, I think that is where the problem lies with both this 55 and the 75 earlier, so when I get the 65 I wont take off without running in with atleast 4-5 tanks as per manual, no matter how much time it takes.

I did manage some hovering today with the 55 and given more persistance it will do ok I am sure. I dont hang by the prop all day. The first flight is always pattern with low throws to calm my nerves and thereafter I will hover in the second flight after I get ove my thumb-shaking. Beyond that I am still getting a hang of the other 3D moves, insufficient air time has prevented me fro trying them much though I do them on the sim.

What I really need is some data on how the 65ax is

Ameyam