Rolling takeoff with a TFE-731

[falconpilot]

The only time I use a static takeoff is when the runway is short... The rest of time, I line up, stand up the throttles, wait for the engines to stabilize, release the brakes and increase the power to the stops... If you want to be really technical... Every takeoff number as far a performance is concerned can be thrown out the window if you do a rolling take off... ie.. BFL, accelerate stop, time to 80 or 100kts, second segment, yada yada yada... I very seldom see anyone do static takeoffs... Hell, even the airline guys don't do static takeoffs... But as far as the TFE engine is concerned, Ive never seen a video or heard of any "rule" that you have to do static takeoffs.

 

[svcta]

At my last job(airline alert) we actually had numbers for rolling takeoffs on every TLR(takeoff/landing report). In rare cases would we ever make static t/o.

Back to the point of the original post: I guess we've determined that there was no such discouragement regarding rolling takeoffs for mechanical reasons(?). Has this, in fact, become a performance issue? It looks like "yes", I just want to be sure.

 

[LJ45]

If you want to be really technical... Every takeoff number as far a performance is concerned can be thrown out the window if you do a rolling take off... ie.. BFL, accelerate stop, time to 80 or 100kts, second segment, yada yada yada...

Not if your AFM has numbers for it, which the LR45 does have an add on for a rolling take off.
As said before, if your power is set at 1000' then that's where your numbers start. I don't see it being be that difficult to figure out, as long as you have extra runway and are not worried about 2nd seg.

 

[blzr]

I have seen the Honeywell video in which the company adamantly states you must not do a rolling takeoff with this engine. The Westwind AFM doesn't say this. I would be willing to go along with this, however 1) static takeoffs are not always a good idea, such as on a slick runway, and 2) we have a regulator approved manual that says rolling takeoffs are permissible with extra runway.

My preference would be to let sleeping dogs lie, but since Honeywell is so insistent about this, what are the opinions of those who have flown 731 equipped airplanes?

Do you happen to have a link to this video? Also which series 731 was this for? All of them?

Thanks

 

[LJ45]

AFM is what rules, not some Honeywell Video JMHO

 

[Hugh Johnson]

I don't have problems with a rolling take off and I'd like to point out that if cleared for take off on 24 at EGLF, before entering the runway, they expect you to do a rolling take off, so make sure to tell them before that point if you can't.

 

[mxpilot2]

I seem to recall similar discrepancies between a reference handout from Garrett vs. aircraft manufacturer data. Was said at the time to be Allied Signal (then) CYA, and a/c manufacturer made their procedure, usually blending AS recommendations into their procedure/numbers. I'd have to dig REAL deep in the archives to find the booklet.

Our SOP has PNF verifying takeoff power met in the first couple seconds, and that acceleration values are met. Having FADEC and other electronic controls has made me forget about how to "set power", ala LR31/55. :blush: We also require 1000' over takeoff distance to do a rolling, and use 5000' minimum runway for dry ops.