I just finished getting the VG's installed on my "mouse" and here
are the findings

Plane:1969 Beech 23 Musketeer Custom III. 180hp CF-YVA
Both tests were based at same altimeter setting, OAT, Altitude and
1500 RPM

Before VG's After Vg's difference % diff
No Flaps 65 59 -6 mph -9.2%
1 notch 60 55 -5 mph -8.3%
2 notch 55 52 -3 mph -5.5%
3 notch 52 50 -2 mph -3.8%

Comments:
First thing I noticed was the way the plane "jumped" off the
runway.
This can probably be attributed to a slower rotation speed with the
VG's and I was still rotating at my regular 75 mph.

A 4 way GPS speed comparison actually found speed to increase by a
couple of knots. With out a digital tach it could have been a slight
difference in RPM but at least the VG's did not reduce the speed!

Found the handling in the air more "crisp" The aileron's
seemed to
have more control at cruising speed and the plane was noticeably
more responsive.

The stalls were very mild with no surprises ie no wing drops etc.

As per the test instructions with the VG's I went to altitude
(7,000ft) and configured poer off, full flaps, trim tab at full nose
up travel and hands off. The plane stabalized at 65-67 mph and
700fpm descent. Intresting after this I pulled back further to see
how it would handle and it stalled and then "bobbed" to corect
itsself and started and ocsillation of stall, bob down and then
stall. I couldnt get the plane into a full stall but descent had now
increased to 1000fpm.

Disclaimer.
I am NOT a test pilot. I am a 350 hour private pilot with 150 hours
on this plane. Your test results may result in different findings.
If you want to see the VG's and discuss them further I will be
arriving in Oshkosh Sat July 23rd and leaving Thursday July 28th.
Will be camping under the wing in the General Aircraft Camping. The
tail numbers are CF-YVA and its red and white.

Have a great day and fly safe

Wayne Pedersen
Claresholm, Alberta






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