First thing is that a 170 does not have balanced landing and takeoff distances. I typically use 150-200 ft more for take off. My first flight with the gap seal revealed balance conditions. At 2200' elevation and 65 degrees I was seeing landing distances around 360' without any wind or crazy braking techniques, and that is from the end of the runway not my tochdown point. My takeoff distance was around 350' without any crazy techniques, just using 20 degrees of flaps (no wind). I figure the landing distance will go down as I get used to the new performance as I feel that I am bringing it too fast using my old numbers.
I believe that you climb fixed pitch props at a higher speed so you get the RPM's up and gain HP. Here are my numbers old and new:
Climb at 70, Before 550 fpm, After 900 fpm
Climb at 90, Before 900 fpm, After 1100 fpm
*That is with the Flaps retracted which implies air still slips through there when they are retracted at high AOA.
The noticeable changes are almost unbelievable, like:
1) on downwind i can be 300' higher than normal
2) when I use extreme measure to get airborne it is an easy transition to normal climb, where before it was almost impossible
3) I can use 30 degree flaps for takeoff and see an improvement over 20 and still transition to normal climb easily
Last night I went and played again after running an errand for my wife.
The conditions were:
No wind and 2200' elev and 65 degrees
Airplane with 5/8 fuel all seats and headsets, survival gear, 185 lbs of pilot, baby stroller, baby swing, and baby walker (wife's errand).
Landing distance was 240' and takeoff was 315' (+/- 10') on three patterns.
The airplane is a stock 145 hp with a 7649 prop and does not have any other lift devices on it. No VG's nor Leading edge Cuff.
I believe this to be truly amazing at 2200' elevation.
Here is what they look like stowed.
.I just checked in my reference and it is household-grade mineral oil with Kent-Moore 28431-1 pigment,
