Engineering Notes
Finally the weather and the schedules for the various flight test personel
all fall into sync and we can get some flights in. The Daylight Savings Time
hit hard as it is dark by the time I can get to the airport. Fall weather
patterns from Hudson Bay are a big change from the shirtsleeves with the
standard summer CAVOK (severe clear) and the winds seem to always be right
across the single strip of pavement. In any case, we all run down to the
airport on a clear high-pressure Saturday and procede to load the aircraft.
Two heavy guys up front (420 lbs of gristle and attitude), full tanks on
both sides (284 lbs of 100LL) and 7 bags of water softner salt (44 lbs
each!). The aircraft doesn't mind the couple of circuits so we complete a
full stop and chuck another bag into the baggage bay. All up weight is now a
few ounces less than 2308 lbs as we taxi into position beside the runway for
a grass take-off. As we sit on the button waiting for our chance to go, we
both agree to try this one take-off with 2 notches of flap "to see if it
makes any difference". ZOUNDS! This is not only the heaviest take-off but
also the shortest! Somewhere around 130 to 150 feet and we are airborne. The
longitudnal feel is good and the aircraft behaves in all three axis. Next
tests....Gross Weight of 2500 lbs (Note to procurement department, buy more
ballast) The tests conducted above simulate 4 people, full tanks and 57 lbs
of baggage.
Ken
C-GJDK Envelope Data and CG Calculator          
                   
Item Weight Arm   Salt            
(lbs) (in)   Bags CG Item   CG Percentage  
OEW 1255 15.9   8 15.9 ACFT   35.77    
Front 417 16.0   (44 lbs ea) 16.0 Pilot Seat        
Rear 176 53.0 Salt 4 53.0 Rear Pax Seat      
Baggage 88 70.0 Salt 2 70.0 Fwd Baggage Area (Behind Rear Seat)  
Cargo 0 85.0 Salt 0 85.0 Aft Baggage Area (In Fuselage)    
Misc 88 35.0 Salt 2 35.0 Behind Pilot Seat (On Floor)    
Fuel 284 24.0 1 1 24.0 Fuel        
Total 2308 22.53 L Tank R Tank     1345 23.63    
Allowed 2500 15.00-23.63       2499 15.00    
          Envelope 2499 15.00    
Weight Weight CG CG   Data 1345 23.63    
Start End Start End            
Date (lbs) (lbs) (lbs) (lbs)            
                   
16-Sep-01 1797 1726 16.70 16.40            
29-Sep-01 2115 2044 18.60 18.50            
Unk 1506 1463 16.30 16.10            
Unk 1719 1506 17.20 16.30            
13-Oct-01 2044 2040 19.96 19.95            
17-Nov-01 2264 2263 21.61 21.61            
17-Nov-01 2308 2237 22.53 22.49