Friday, February 1, 2013

I have always wanted to tape all the joints and farings up on this airplane and see what speeds it will make in a semi-race configuration.
Yesterday afternoon I found time to completely wax the airplane man what a job. Reminded me of polishing a 38' smooth side aluminum dump trailer when I was trucking :eek:
I then taped up all of the seams and inersections to provide a smoother air flow accross the joints and to prevent air from entering or exiting.

The method used for determining TAS during this test was per NTPS using there 3-way gps spreadsheet.

I started before daylight in an attempt to provide a more uniform air mass for testing. The sun did not have time to start warming the air and cause the air mass to start rising.
Test #1 
Density Alt 8000
MAP 23.8
RPM 2700
Mixture  Approx 175 deg ROP
GPH 18.5
TAS per ntps 189.3
TAS 189.8 per Dynon
Test #2  Note : I was trying for 75% power here but when I got back on the ground and did the calculations correcting for temp it wound up being more like 79% power.
Density Alt 9910
MAP 21.9
RPM 2700
Mixture    Approx 175 deg ROP
GPH 16.9
TAS 186.7 per ntps
TAS 187.4 per Dynon
Test #3   Note : This is the same as above but running Lean of Peak
Density Alt 9910
MAP 21.9
RPM 2700
Mixture    Average readings of 10 deg Lean of Peak
GPH 12.1
TAS 182.6 per ntps
TAS 183.0 per Dynon
Test #4   Note : This is at Sea Level with the hammer down:D
Density Alt 0
MAP 29.4
RPM 2800
Mixture     Approx 175 Rich of Peak
GPH 27.5:eek:
TAS 193.1 per ntsp
TAS 195.5 per Dynon

This shows that the Dynon TAS may have a slight error on the high side but is well within my needs. 1-2knots is close enough for planning.
By the way......it was a lot of fun :D:D

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