September 15th, THIRD FLIGHT

Climb tests - WOW! (Engineering notes from Ken)

C-GJDK Climb Tests - 1797 lbs        
Date 16-Sep-01 Pilot DR   Weight      
Temp 12 C Tech KM   1797 lbs    
p Alt 0 ASL Fuel 1/2L, 1/2R        
Alt Set 30.10              
               
From (alt) 1500 2000 2500 3000 1500 2000 2500 3000
To (alt) 2000 2500 3000 3500 2000 2500 3000 3500
Speed Time Time Time Time V-Speed V-Speed V-Speed V-Speed
(mph) (sec) (sec) (sec) (sec) (fpm) (fpm) (fpm) (fpm)
60 28.25 58.65 89.73 121.60 1062 987 965 941
65 29.13 56.95   32.53 1030 1078   922
70 25.96 54.97 84.81 115.66 1156 1034 1005 972
75 25.41 52.02 80.64 108.64 1181 1127 1048 1071
80 24.73 51.03 79.86 106.40 1213 1141 1041 1130
85 25.93 51.77 79.81 108.08 1157 1161 1070 1061
90                
95 28.03 58.10 87.98 119.48 1070 998 1004 952
               

The data looks noisy, but is actually quite good.  The flat curves give us the chance to play with prop selection (Pitch) and allow greater high end speeds without really sacrificing any climb performance. (Congratulations to Sensenich, everything they promised and more)

With a light load (1797 lbs) we have around 1200 fpm max and losing only 100 fpm per 1000 feet.  Light load Service ceiling is estimated 12000 ASL.  We have not yet completed load differences (heavy weight climbs) but we are probably looking at a slight loss is service ceiling but likely around 10500 ASL.

CALIBRATED SPEED TESTS

C-GJDK AirSpeed Indicator Calibration        
Date 16-Sep-01 Pilot DR Weight        
Temp 12 C Tech KM 1850.25 lbs   40 40
p Alt 0 ASL Fuel 3/4L,5/8R       140 140
Alt Set 30.10 Altitude 2000 ASL          
Run                
IAS GPS1 GPS2 Avg IAS CAS IAS CAS RPM
(mph) (mph) (mph) (mph) (mph) (mph) (kts) (kts)  
55 47.9 69.3 58.6 55 58.6 47.8 50.9  
60 50.1 71.8 60.95 60 61.0 52.1 53.0  
65 53.8 77.6 65.7 65 65.7 56.5 57.1 1700
70 58.1 83.1 70.6 70 70.6 60.8 61.3  
75 62.2 91.9 77.05 75 77.1 65.2 67.0  
80 65.5 93.7 79.6 80 79.6 69.5 69.2  
85 71.6 95.9 83.75 85 83.8 73.9 72.8  
90 77.1 98.2 87.65 90 87.7 78.2 76.2  
95 79.4 103 91.2 95 91.2 82.6 79.3  
100 84 112 98 100 98.0 86.9 85.2 2150
105 88.4 115 101.7 105 101.7 91.2 88.4  
110 92.3 122 107.15 110 107.2 95.6 93.1  
115 96.3 125 110.65 115 110.7 99.9 96.2  
120 101 128 114.5 120 114.5 104.3 99.5  
125 103 130 116.5 125 116.5 108.6 101.2  
130 111 136 123.5 130 123.5 113.0 107.3  
135 118 139 128.5 135 128.5 117.3 111.7 2700

A few points - the ASI is not doing us any favours.  It reads Low at Low speeds (saying 55 mph when we are doing 58 mph) and reads Hi at Hi speeds (saying 135 mph when we are doing 128.5)

Nevertheless, good linear speed curves.  Maybe tubing loss or pitot size is a factor here. I will look into it.

Looks like, with the new tight engine we are getting 128.5 mph and as time goes on we will probably gain 2 to 3 mph as the engine breaks-in. This will give us our projected 130 mph.