I think a few loads in the 29/40-120 list would work...definitely the lower thrusting variants.
Motors I'll be trying in my Phoenix upon completion/when it warms up outside:
F20W
F14J (yeah, that's old)
G33J (kinda old)
G25W (the new 29/120 reload version)
G33 Mellow Yellow
There are others that will work...just have these in the inventory and slated for glider burns.
I think the Estes F15 would work fine, but I'd be concerned about "plugging" the engine. Just don't want any hot gases flowing out the front end of the motor with this or other rocket gliders.
Will let y'all know how they work!
Eric,
I know you are a very experienced RC flyer so I'm a little reluctant to say what I'm about to say. Please feel free to dismiss my concerns seeing they come from a dumb old Kansan!
I'd be a little leary of flying a Phoenix on a couple of your motor choices above. Here's why: One of our club officers who is a VERY experienced RC flyer has been flying his Phoenix for the past season. On the initial flight he flew it on the 32mm F13 and we were both surprised at how fast and how high that motor boosted the Phoenix. Since then, he's been flying the G12 reload and if you allow it to continue to climb, it makes the Phoenix a pretty small speck in the sky. For review, let's remember that the G12 puts out an average thrust of 10.N and a total thrust of 87.2N. It weighs 131 grams loaded.
Now let's look at the G33 Mellow. That motor produces an average thrust of 32.7N (3.2X the G12) and a total thrust of 143N (1.6X the G12). The new G25 puts out 22.2N of average thrust (2.2X the G12) and has an total thrust of 117.5N (1.35X the G12). In addition, this motor is 66 grams heaver than the G-12.
My point to this rambling is that, when completed, your Phoenix is going to be a really light, aerodynamically clean flight vehicle. The G12 motor launches this aircraft to heights near my ability to properly and easily transition to glide mode. I don't believe that more thrust (both average and total) is going to be your friend. The 32mm case and the reloads are available. When more of us fly them getting them will only get easier. I'd hate to hear that one of these other motors did something bad to your Phoenix.
Do me a favor, if you elect to fly it on one of them, be sure someone it recording video. It will either be really cool or really cool!:wink:
Bob