Originally Posted by
AEROSHELDON
Website seems to say 140 to 160--
"Many have asked if the Diablo can also be flown with a regular non-vector pipe. Well, yes, we will offer an option for those as well. However, the diameter of the thrust tube will be smaller as it will be a dual walled pipe, which still needs to fit unter the taileron spar. No problems, as the engines should be limited to 140-160N in the non-vector application anyway."
I saw on the straight pipe when you click on it on the website it says 120-140, then I saw in this thread Dave recommends 140-160. I missed on the main Diablo page the quote you have above that says 140-160.
He's wanting to go with a 170-190, but it doesn't sound like the straight pipe can handle it? He really likes to take off and go straight up with the full fuel load, that's mostly what he's after, not speed, we know it's not a speed plane.
I guess you could go with the vector pipe and just fix it in place?