Chippy CoG limits anomaly
I don't want to make too big a deal of this but if someone knows the answer I would appreciate it.
I've gone through an old copy of the DHC-1 Chipmunk pilots' manual and created a spreadsheet W&B calculator.
I've come across a small anomaly. In the manual a graph is given of C.G -(minus) Inches forward of datum vs Fuel in aircraft - Gallons
It then shows slopes for CREW ONE (FRONT SEAT) and CREW TWO
Though I can get close to the graph in the spreadsheet my slopes are too shallow.
Now it might sound not a big deal, but the fun bit is that at the right combined crew weights one **could** find that the aft CoG limit is exceeded when fuel is burnt.
Obviously this is just an exploration of the pilot's notes and I won't be taking off in a DHC-1 without checking the real W&B figures for the aircraft. Just wondered if anyone can tell me how this graph would have been originally calculated so I can trace the anomaly.