Vx, Vy rates

[Av8torTom]

For those of you with AOA, assign a specific angle to each Vspeed. Hold that AOA and the Vspeed will follow. For example if Vx is 8 deg AOA, go to and hold 8 deg, and the airplane will settle at Vx some moments later and there's no under shooting or over shooting the airspeed. Very handy at a short field with trees at the end. This is really what flying AOA is all about, not just for stall warning.

[Soarandtow]

Kelly please send me a copy as well mku2@hotmail.com
thanks
LD

[ArVeeNiner]

Originally Posted by Soarandtow

Kelly please send me a copy as well mku2@hotmail.com
thanks
LD

It has been sent.

[sibriggs]

Please send one to me also, thanks Steve Briggs

[rjcthree]

Thanks everybody for the help/info.

After IAS calibration and halfway through Phase 1, N183RC V speeds are as follows:

Vx = 75kt
Vy = 95kt
Vg = 80kt (Best glide defined as best distance)
Vg, 10 deg flaps = 75kt
The slope of the curves is very shallow around the respective optimal number, +/- 5kt on most V speed is within 10% of optimal. Based on the data, I could call Vy anywhere between 89kt to 98kt, because the curve is dead flat in the range, for operational purposes, I like the higher speed for cooling reasons. Coming out of a Warrior, the deck angle vs horizon at Vx is pretty mind boggling. AC is RV-9A, 1113 empty, o-320/160hp, fixed Sensenich.

[terrykohler]

Try this for the RV9A performance report

http://cafe.foundation/v2/pdf_cafe_apr/rv-9a.pdf

Terry, CFI
RV9A N323TP

[sirlegin]

6 years flying my 9A
0320 dual lightspeed, fuel injected, catto 3 blade

VNE Never Exceed Speed 210 mph
VNO Maximum Structural Cruising Speed 180mph
VA Maneuvering Speed 124mph
VFE Maximum Flap Extended Speed 95mph
Vy Best Rate of Climb 90mph
Vx Best Angle of Climb 80mph
Best glide speed 75-80mph
Vso Stall Speed, Landing Configuration 54mph

[brad walton]

I'm sure I'll be corrected if I'm wrong, but my recollection is that Vy equals best glide ratio and Vx equals minimum sink speed as well as being best angle and rate of climb speeds respectively.

[sirlegin]

Originally Posted by brad walton

I'm sure I'll be corrected if I'm wrong, but my recollection is that Vy equals best glide ratio and Vx equals minimum sink speed as well as being best angle and rate of climb speeds respectively.

You are wrong, but correct me if I'm wrong

[moosepileit]

The best climb/best glide and best angle/min sink are starting points.

FAA sez:

"This is often referred to as best glide speed and, on most airplanes, it will be roughly halfway between Vx (best angle of climb speed) and Vy (best rate of climb speed). Keep in mind that this speed will increase with weight so most manufacturers will establish the best glide speed at gross weight for the aircraft."

https://www.google.com/url?sa=t&sour..._D_osCZnW3dTaV