Running my 55 without cowl. Heat is not the issue. It loses compression when hot and after a few seconds regains it. We didnt run-in her properly last year, that could be the issue. I could rebuild with a new piston-liner but that would be expensive

My 55 is already mounted at the 45 deg angle, so mounting the 75 that way is no prob. The airplane can take a larger prop- 14x4 in its stock config. I was running a 13x4 on the 55 but had tested the 14x4. If a larger prop is required I will put in a set of larger wheels than the 2" Dubro rubber I am currently using.

I am also thinking, how about a 65ax? I dont have that engine- I have

1) 55ax- if I rebuild with a new piston and liner
2) 72a- it was meant for another airplane and was bought box damaged. It could be a little under powered as it would be equivalent to a 48 size engine
3) 75ax
4) FS91sII which is a very reliable engine and currently in another airplane. Its lighter than the 75ax (by 2.26oz or 64g) and has a little less power. It will require a rebuild of the Reactor becaust the throttle servo will not be in the correct place

So if the 65 is required, I will need to order it. Else I will need to take a call and put the Reactor into storage and take out the Phoenic Extra 60" with the 120ax which I am preparing for quite some time


Ameyam