FSCargo weight trials...

petermcleland · Post by **petermcleland** » 09 Jan 2007, 17:57

I've switched to the real user version of the B707 now and the idea of this trial was to adjust the weight and balance figures to allow FSCargo to allocate a large load and then having got it and full fuel aboard, to see if I could get it out of my base with no wind.

I zeroed the weight in the zones where I wanted the Cargo loaded and managed to clear space for 32190 lbs of freight. As you can see in this picture FSCargo has allocated a large load which it lists at 15 tons...I assume that is short tonnes at 1000 kgs per Tonne.

There is a short sequence here:-

http://forum.fsscreenshots.com/dcboard. ... =full&page

Thanks for looking :dance:

blanston12 · Post by **blanston12** » 09 Jan 2007, 18:21

That was scary close. Which version of the B707 are you using?

petermcleland · Post by **petermcleland** » 09 Jan 2007, 19:14

blanston12 wrote:That was scary close. Which version of the B707 are you using?

This one:-

HJG Boeing 707-320C v6

cstorey · Post by **cstorey** » 09 Jan 2007, 19:22

Hmmm! the over-rotation with what looks like a tailscrape suggests that we were never that confident of getting out in the first place! What length (TOD) is your runway Peter? and have you got the manual which indicates, rather surprisingly , that the limiting factor on weight with the 707 was often not runway length but tyre speed which had fairly strict limits . A no wind situation obviously has a direct effect on this . I'll bet you won't do it again - but the pics are staggeringly good and made me , for one, have my heart in my mouth, rather like the u tube video of the 747 coming out of Hurn does

Chris

petermcleland · Post by **petermcleland** » 09 Jan 2007, 20:31

cstorey wrote:Hmmm! the over-rotation with what looks like a tailscrape suggests that we were never that confident of getting out in the first place! What length (TOD) is your runway Peter? and have you got the manual which indicates, rather surprisingly , that the limiting factor on weight with the 707 was often not runway length but tyre speed which had fairly strict limits . A no wind situation obviously has a direct effect on this . I'll bet you won't do it again - but the pics are staggeringly good and made me , for one, have my heart in my mouth, rather like the u tube video of the 747 coming out of Hurn does

It is short Chris which is why I conducted the trial. I got out with 15 tons and full fuel but I can easily take out a lot of fuel and get out safely. I have a Recorder Module file and that clearly shows NO tail strike

This one little trial has established some data that hours of delving into "Performance A" would have simple produced the answer "No". Not actually working for an airline in FS lets me work out things this way. I rather enjoy it. My next take-off will still have 15 tons of freight bound for KSFO but the flight is only about 4 hours so I can unload a lot of fuel and rotate earlier to less angle and clear the fence easily. I may even have some wind to help.

Yes the tyre speed factor is very interesting, but with my short runway here, it will not apply...I've only got 5600 feet of runway. The lift off speed there was only 145 knots. It will be relevant elswhere though and I will need to know the max permitted ground speed with tyres on the ground. Did the real aircraft have a wheel speed meter? Trident had a Doppler Ground Speed but I doubt the 707 had anything like that.

Jetset · Post by **Jetset** » 10 Jan 2007, 05:41

Looks like it's time to lobby the locals for a runway extension. Good Luck!

Nigel H-J · Post by **Nigel H-J** » 10 Jan 2007, 10:06

Interesting shots Peter, just out of interest, was that T/O using standard flap settings or did you apply another notch for the zero wind factor?

petermcleland · Post by **petermcleland** » 10 Jan 2007, 12:13

Nigel H-J wrote:Interesting shots Peter, just out of interest, was that T/O using standard flap settings or did you apply another notch for the zero wind factor?

Nigel,

I had another notch...I think it was 25 degrees on the gauge and the LE flaps were down.

petermcleland · Post by **petermcleland** » 10 Jan 2007, 12:15

Jetset wrote:Looks like it's time to lobby the locals for a runway extension. Good Luck!

Jetty,

The terrain won't permit it :roll: However, this was just a trial to see whats what...Yes it was close...but it served its purpose...I now know that 15 tons of freight with full fuel and no wind is only just doable but unsafe. In fact I only need to take that 15 tons to San Francisco and that is only 4 hours away...So I can reduce that fuel load by a lot and get out very easily. I also can note down mentally that with my full freight load of 15 tons, I need about 6000 feet of runway in order to take full fuel.

Nigel H-J · Post by **Nigel H-J** » 10 Jan 2007, 13:12

Nigel,

I had another notch...I think it was 25 degrees on the gauge and the LE flaps were down.

Thanks Peter.

Regards Nigel.