737 take-off speed

[amanoffewwords]

Quickie question re the BA 737-400 and -500 operating from LGW:

Given a full load, and a mid-afternoon departure (hence 2nd or 3rd sector of the day), calm weather and a departure from LGW to MAD how fast would said 737 be travelling (in mph please) at the time rotate is called?

Just need to know, 'cause I heard a figure somewhere which I repeated to Mrs Words but she wouldn't believe me and then probably I got it wrong anyway.

Cheers
amofw

ps: sorry it's in the wrong forum, just read the text under 'questions', which seems to have changed...

[Avman]

There are of course a number of variables, but a ball park figure would be about 165 mph.

[amanoffewwords]

Great, that's perfect - I was right then!

Cheers
amofw

[witchdoctor]

Would've expected that to be higher. 165 kts sounds about right, but that is closer to 190 mph.

165 mph is only 145 kts, which seems a bit slow for a full 734 on a calm summers day.

[Avman]

Hey amanoffewwwords please note my three key points:

- Many variables
- Ball park figure
- About

165 kts would be rather excessive unless operating hot and high. We are talking UK here and MAD is only a two and quarter hour jolly.

[amanoffewwords]

err...I agreed with your answer AVMAN - sure you're not disputing witchdoctor's answer?

Cheers
amofw

[mutt]

These are for a -200, but the 400/500 should be quite similiar.

[table]
130k Lbs Flaps 01 160KIAS
130k Lbs Flaps 02 155KIAS
130k Lbs Flaps 05 152KIAS

[/table]

Mutt.

[Gin Slinger]

for a -500

Okay Gatwick, let's assume runway 26L (don't fly out of LGW, so no idea if this is the favoured runway for departures), no wind, standard atmospheric pressure and temp 20 deg C. Weight is 53000 kg, which I guess would be about right for a full-house to MAD

Vr (speed which you pull back on the control column) = 136 kts or 156.4 mph using a 1.15 conversion factor.

Hope this helps.

[triplespool]

Just something for info from what I can remember running 700's out of EGKK last summer. Running up towards max mass just short of 70000kg needed improved climb with 22K engines the V1/VR was pretty close to 170kt!.
Trip

[amanoffewwords]

Thanks all, just wanted a rough idea of a speed - appreciate there a multiple factors to take into account so what you gave me is good.
Cheers
amofw