C-130 Loop

[Mase Taylor]

https://www.youtube.com/watch?v=xbwM-nBKVaI

[Ralph Jones]

That's gotta void the warranty.

[Terry Carraway]

Since it was a LockMart aircraft, they would void themselves.

I find a Max Payload, at 2.5G for 41K pounds. Empty weight of 75K. So a max airframe load of 290K. At 80K pounds, that would be 3.6G.

Easy peazy to do a loop at light weight.

[Tom Charlton]

Easy peazy to do a loop at light weight.

Hi Terry and others,

Anyone know what Gross Weight "VA" is for a C-130?

My understanding is that to calc VA at your actual weight:
VA @ Actual WT. = (Published Gross Wt. VA x sqrt(Actual WT / Gross Wt.))

Regards,
Tom Charlton

[Randy Sohn]

"VA" is

Tom, actually it is a V with a small capital letter B beside it. A V(sub)B. Don't have a keyboard key on here for it, I'd included a chart of it when I wrote the CV-58t0's flight manual at NOR, also a chart for V(sub)A. Looking back, prolly didn't need to but we got that in the FAA's test pilot certification flight school at OKC.

best, randy

[Tom Charlton]

Tom, actually it is a V with a small capital letter B beside it. A V(sub)B. Don't have a keyboard key on here for it, I'd included a chart of it when I wrote the CV-58t0's flight manual at NOR, also a chart for V(sub)A. Looking back, prolly didn't need to but we got that in the FAA's test pilot certification flight school at OKC.

Hi Randy,
Snoop’n round the intertube I discovered the following:

Va — Design maneuvering speed. The highest safe airspeed for abrupt control deflection or for operation in turbulence or severe gusts. It does not allow for multiple large control inputs. If only one speed is published it is usually determined at max landing weight. This speed decreases as weight decreases.

Vb — Design speed for maximum gust intensity for transport-category aircraft or other aircraft certified under Part 25. Turbulent-air penetration speed that protects the structure in 66 fps gusts.

As a GA pilot I think in terms of Va. Wasn’t cognizant of Vb for transport category aircraft.

Anywho, brought to mind the C-130 that folded a wing whilst drop’n slury on a forest fire.

Regards,
Tom Charlton

[Randy Sohn]

Anywho, brought to mind the C-130 that folded a wing whilst drop’n slury on a forest fire

Yup, remember that one well, IIRC Bob and his wife had that A????? model Herc.

And again, yup, still not really sure about why I included both Va and Vb in the 580 manual.

best, randy