BAC-111 engines overheat

[NigelC]

Absolutely

[cstorey]

All aeroplanes lose field performance as the temperature, and with it the density altitude of any given runway, rises . It is a matter of simple physics . This was why the VC10 with its exceptional field performance was the only fanjet aircraft which could operate any significant stage length out of Nairobi in daylight hours . Even though it lost performance, it still had sufficient margin to cope. A 747 however......

[speedbird591]

All aeroplanes lose field performance as the temperature, and with it the density altitude of any given runway, rises . It is a matter of simple physics . This was why the VC10 with its exceptional field performance was the only fanjet aircraft which could operate any significant stage length out of Nairobi in daylight hours . Even though it lost performance, it still had sufficient margin to cope. A 747 however......

Although the VC10 couldn't make London from Nairobi. I remember we had refuelling stops scheduled in Rome or Frankfurt on northbound flights. Sometimes we couldn't make it that far and occasionally had to make an unscheduled stop at Cairo. The poor Tristars even struggled to get out of Cairo in the summer and we often left freight and staff passengers behind to keep the weight down.

Ian

[Vc Ten]

Just a few details from this mornings flight back from Naples on 1-11 500. Fuel load 10500kg giving 47100 kg all up weight OAT temperature 20c wind 3 knts direction 80degrees. Takeoff rwy 06 (2650m) Vr on chinagraph 137kts Throttles set to 12.200rpm egt 600c top temp on Flaps set 15degree 3 degree tailplane Vr and T.O well within safe runway length Climb and accelerate to 200knts at 1500ft/min Autopilot on set to speed hold 210knts climb 1.5kft /min watching engine temps 550c. At 8000ft switch to auto throttle, set to 240 knts reduce climb to 1.0kft/min at 1200ft 260 knts climb 800ft/min. Simples
Cheers
Dale

[NigelC]

[MenInBlack]

WOOW, thanks guys, many answers, thank you..hehe, I usually get maximum 2 on other forums...Well, I took off from Zurich, Switzerland, bound for Dubrovnik, Croatia. Payload: 7600 pounds, tanks full -> then I set the fuel to 50% or so, payload to 0 and only then I was able to take off. Since I used it, I know where Top Temp is. One more thing: After completing my flight, I took off with the same plane from Bucharest Henri Coanda airport, Romania, using water injection, but no Top Temp, tanks full, 7600 pounds of payload...I got airborne like a leaf in the wind...

[MenInBlack]

Correction, correction, I took off from Denver, bound for San Diego.

[Charlie Hotel]

I love the BAC1-11 too, and overcooking the engines always used to catch me out as well in the beginning. I would cheerfully firewall the throttles, climb out, then listen as the engines would spool down one after another resulting in a eerie silence about 2000ft AGL...
After that I bring them up just until the overheat lights come on, then back off a bit and it's been fine. Sometimes, it seems to only climb due to the curvature of the earth, but I was usually heavily loaded.

[Garry Russell]

On short runways I firewall thre throttles and bring them back into safe as soon as I'm in positive climb gear up

[aeroart]

I also learned about running those engines too hot on my first few 1-11 takeoffs from Seattle. Also got some dead-stick practice into Boeing Field at the same time!

Art