Just info Bro
TSwezey said:
Russ thank you for your information. That is what I was looking for. I was really curious about getting a lower stall speed at an aft CG and with heavier weight. An Aggie thanks a Red Raider.
George - I didn't want a lesson on aerodynamics. I got enough of that at Texas A&M with my Aerospace Engineering degree. What I wanted was REAL experiences from people who own or fly RV-10's. I wanted ACTUAL flying RV-10's. Not theory and not the factory's plane. All planes are different and the MORE people responding with ACTUAL data and experience will help me.
Sorry if I offended you. You wrote:
"Does anybody know their planes approximate minimum stall speed?"
I think I answered your original question. I was not talking down to you, but you can't get around aerodynamics and flight test methods when talking about what the stall speed is.
" I wanted ACTUAL flying RV-10's. Not theory and not the factory's plane."
My main point frankly was RV's are very consistent and Van's specs are representative, but that is lost on you. I just noticed you have a "special" engine. This makes Numbers from typical RV-10s (Lycoming) even less useful. A big V8 car engine is no where near stock or per plans and heavier,
so its a waste of time comparing, with all do respect. Your Stall will be about 3 or 4 mph HIGHER.
"I was really curious about getting a lower stall
speed at an aft CG and with heavier weight."
Todd, I have to be honest that comment bothers me. It's your plane. With all you skill an knowledge, I know the idea of using aft CG to get lower stall does not compute. When you talk AFT CG you talk controllable & stability. CG affect on stall is small (2 kt may be?). Why give up stability for a few mph lower stall. I don't know anyone that flys on the ragged edge of the envelope. That is why we have 1.3 Vso for approach.
With your heavier engine you will probably be 3 to 4 mph higher with similar payload. I'm just confused about your obsession with knowing the min stall, which is a moving target and affected by 100 things. Are you trying to fly into a short field? Vortex Generators will makes up some of the higher stall for the higher empty weight due to the heavier engine.
If you are going to fly at higher gross weights you can extrapolate new stall speeds with existing data, but with your education I'll not bother or bore you.
[For those that want to know the formula is sqrt (Weight/Max Weight) * Stall. For the RV-10 63 mph at 2,700 lbs. So if you have a heavy RV-10 over gross (not recommended by Van's aircraft) by 300 lbs you get:
sqrt (3000/2700) * 63 = 66.4 mph. ]
PS: BTW, I went to U of Washington and LSU, engineering. I also have 3 FAA flt instructor ratings and 2 ground inst ratings. I like to teach, so forgive me.