BeechTalk - BT

Username Protected · **Posted:** 02 Feb 2015, 01:21

Username Protected wrote:

That's OK in theory, but if he has a performance related incident he is likely uninsured...no?

If insurance companies didn't pay any claim in which some limitation or FAR was violated, they would pay no claims at all.

I very seriously doubt an insurance company will reject a claim on this basis.

Mike C.

Username Protected · **Posted:** 02 Feb 2015, 01:41

Username Protected wrote:

Hmm, it was explained to me in training at some point (I don't recall which one anymore) that at the extreme edge of the takeoff performance charts, which include MGTOW, 5° flaps, ISA+30 (i.e. 29°C at 8000'), and up to 10 kts tail wind, the TAS would be over the tire speed limit.

I think that was done to show you that Vtire can be a limit you can hit under extreme conditions that are still "on chart". It does take a very special set of circumstances.

I do not believe the 8000 ft limitation came from that.

With your stated conditions, MGTOW, ISA+30, 8000 MSL, 10 knots tailwind, you are going to use MAJOR amounts of runway. My chart says 8,300 ft (but that is based on -6 engines).

Mike C.

Username Protected · **Posted:** 02 Feb 2015, 02:11

Username Protected wrote:

With your stated conditions, MGTOW, ISA+30, 8000 MSL, 10 knots tailwind, you are going to use MAJOR amounts of runway. My chart says 8,300 ft (but that is based on -6 engines).

Agreed! It'd be stupid to use those conditions (why wouldn't you use flaps 20, or takeoff upwind instead of downwind?). But... the story was they set the limitation based on the worst case conditions charted. I dunno. Could be completely made up. But, the numbers come out pretty close.

Username Protected · **Posted:** 02 Feb 2015, 09:10

Not that mfr limits make sense, but it would be pretty easy to put a v-tire line on the chart rather than extrapolating an extreme case to limit normal ops.

Username Protected · **Posted:** 02 Feb 2015, 21:02

Username Protected wrote:

Not that mfr limits make sense, but it would be pretty easy to put a v-tire line on the chart rather than extrapolating an extreme case to limit normal ops.

Agreed.