I took an after supper joy ride in the KR this evening with calm winds and smooth air. I decided to add a bit of data to our horizontal stab discussion.
After playing for a while doing high speed passes at a local grass strip and making some stop and go's at the home airport I left the pattern and set the KR up in cruise. I trimmed the airplane at 150 mph indicated for stable level flight and returned to the airport for landing without touching the trim again. Refer to my earlier post for aircraft data. After landing I measured the following. My trim tab measures 4"X10" on a standard KR elevator. The trail edge of the trim tab was negative 1.1 Inches below the trail edge of the elevator. An engineer might be able to run the numbers on trim tab percentage of total elevator area, air loads, etc. and determine the actual elevator deflection it causes and then determine a correct setting for the horizontal stab. As for me I'm going to eat a bowl of ice cream and watch the late news.
I made the landing without lowering the speed brake which I have not done in hundreds of hours of flying as it requires a fair amount of trim change to reduce stick forces. I was reminded of why I think many KR's become hangar queens. Landing my KR without drag induces a bit of a pucker factor and is not at all the pussy cat KR I normally enjoy flying. Flat approach, hard to slow down, and floats and rolls out forever. I made the mistake of letting the tail down too soon and the mains got real light and directional control got erratic. With the speed brake down it reminds me of landing the Tripacer I used to fly. Totally different.
Safe flight.............. Larry Fllesner _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
