Empty Weight and CG Data Collection

[huntaero]

Mine is 1532 Lbs I0-540 2 bade Harttzell, with 4in prop extension, insulated with fore and aft heat, fabric interior, single dynon display with A/P, Stewart System fabric and paint, wet wing 260 liter cap. 8:00 x 6 tires, 16631.031 Moment 10.855 C of G. full oil and residual fuel.

[svyolo]

I finally got around to weighing. I pumped out all usable fuel via the fuel pumps. I don't think there is a kit "baseline" weight. I did weigh almost everything I added, and a few things that reduced weight. I used Oratex which has a known weight. Minimal paint on the fuselage cowling/doors/wintips. So here goes.


image.png
image.png

Bob IO540
2 blade Hartzell Trailblazer
3" prop ext
10 quarts of oil
unusable fuel
no back seat
Unpainted wings. Vinyl wrapped Leading edge
mostly fabric interior. Very light
ELT
small tires
no aux tanks
"less counterweights" means I saved 5 lbs of lead because of Oratex. 1lb/elevator, 1.5/aileron less lead.

2018 Bearhawk "B model

Empty weight 1406 7.1" cg

Mains were 3" ahead of datum, TW was 209". Only 67 lbs on the TW


Oratex is <6 oz/yard. Painted fabric is 10-20 oz.(Bob quote)

My best guess is a B model kit, carbed/magged O-540 with Trailblazer prop, covered with Oratex, with no paint anywhere, no back seat weighs 1290 - 1300 lbs. Plus whatever you add too it.

That is my best guess, but I believe it is at least in the ballpark.


I weighed almost everything, if I didn't I rounded up to the next pound.

[Nev]

That's a nice lite aircraft John.

[svyolo]

I always wondered what "baseline" was. Mine has very little finish, and half of that is a known weight. My paint is probably only 10lbs +/-5. Everything else, I weighed. Rounding up to the next pound covers fastener weight. Throw in a back seat (25-30) and big(ger) tires and it is 1450+.