AC43.13-1B Figure 10-17

The figures throughout Section 10 are like one example using the same aircraft, building piece by piece until you arrive at the full picture. At 1169 pounds empty weight, it might be a C140, definitely a tail-dragger. But they seem to try to include calculations that apply to a trike.

"...from the main weight point centerline to the tail (or nose) point centerline". Oh, dear, can you try to confuse me more? The baseline they use is between the wheels, not datum to wheels. Fun.

This material has been around for a very long time. For the typical 43-13 user it's already core knowledge. The FAA also has a downloadable 115 page Weight & Balance Handbook (FAA-H-8083-1.pdf)too. Every licensed aircraft mechanic is trained on this and probably tested in written, oral and practical tests. Every pilot is also expected to have a weight and balance workup for every flight. It is what it is.

My posts reflect my personal views and are not in any way endorsed or approved by any organization I'm professionally affiliated with.

I'm the one doing the training for mechanics. I'm an aerospace engineer and A&P... asking why the FAA did it like this.

who knows ? maybe it seemed like a good idea at the time. Maybe me your own presentation material ... do taildragger and tricycle separately ?

if people push, "it's based on AC43-13, and a million texts" ... it's W&B ... it ain't rocket science. (as I know you know)

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.