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pow0011

-600 -700 VR Problem

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I got the the 600/700 addon yesterday and all the takeoffs I've done......well attempted...have failed. I go though the weights as I normally would with the 800/900, I use full passengers with 30lb of baggage for each and the appropriate fuel needed +5 reserve for the flight and put it into TOPCAT (which uses the iFly 737-700, still similar weight and balance) and it tells me that I should have enough room to takeoff on some of the longest runways. However I find myself getting no response from the aircraft at VR even when I pull the yoke full back, if my VR is 130 for example I may only lift off at say 170-180. Does anyone else have this kind of problem and have solution? It's kinda bugging meWorried.gif

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I got the the 600/700 addon yesterday and all the takeoffs I've done......well attempted...have failed. I go though the weights as I normally would with the 800/900, I use full passengers with 30lb of baggage for each and the appropriate fuel needed +5 reserve for the flight and put it into TOPCAT (which uses the iFly 737-700, still similar weight and balance) and it tells me that I should have enough room to takeoff on some of the longest runways. However I find myself getting no response from the aircraft at VR even when I pull the yoke full back, if my VR is 130 for example I may only lift off at say 170-180. Does anyone else have this kind of problem and have solution? It's kinda bugging meWorried.gif
You didn´t forgot to press TOGA perhaps?..../ Leffe

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Well in many a times in my cases I have always forgotten to set the trim and this leads to a delayed takeoff..so check whether you have properly trimmed the aircraft before the take off roll..Pankaj

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I've set my trim and checked my speeds with the FMC. And of course I pressed TOGA. I use TOPCAT for the derates/double derates and let the FMC calculate the speed for me.

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Is your yoke calibrated? I had a similar problem to this, would hit VR, and wouldn't be able to lift off until I spun a bunch more trim into it. Checked my yoke against the SYS screen, turns out when I pulled back I was only getting about half up deflection (if that makes any sense, don't know the technical terms), when I calibrated it, it worked perfect again.

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I checked that and I'm getting a normal response from the elevators.Remember, I said that taking off in the 800/900 perfectly fine, I'm sure there's no drastic difference between the 4 variants.

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And you are really sure that your trim is set correct? Because in the -700 you'll need a little more trim than in the bigger ones.Also you need to pull much stronger in the tinier ones, at least that's what my experience with them tells me.

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I'm using what the FMC recommends for the trim. I'll try again and use a little bit more trim and pull back more.

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if you give all info on your take off data and config we can try and see if the problem is present also for us.

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Confirm your using appropriate measurement for fuel/wgt, lbs/kgs? The 600/700 I have found take more pull on the yoke.

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OK,This is all in LBS:YBBN-YMML: 774NMPassengers: 96Baggage: 2880LB Split evenly into the FWD and AFT compartmentFuel: 16000LBTrim: 5.03Flaps: 1RWY Length: 11680ftHead Wind: 14ktTakeoff Setting: TO2Derate: NoneV1: 121VR: 124V2: 130

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OK,This is all in LBS:YBBN-YMML: 774NMPassengers: 96Baggage: 2880LB Split evenly into the FWD and AFT compartmentFuel: 16000LBTrim: 5.03Flaps: 1RWY Length: 11680ftHead Wind: 14ktTakeoff Setting: TO2De rate: NoneV1: 121VR: 124V2: 130
I presume you are getting those V speeds from Topcat?I have found when I select TO2 Derate, the FMC will give me a "V speeds not available" message.Is the V speed info accurate from whatever source you are using?Just noticed you are using Flaps1... Your V speeds seem very low for flaps1. I use Flaps 15.

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Only the takeoff thrusts I get from TOPCAT, I let the FMC do my V-Speeds. I've also tried similar settings with flaps 5 as well.BTW TOPCAT calculated that I should have about 7000ft remaining, I end up going far beyond that.

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I will try soon.You can help the plane by loading baggage on the aft cargo only, crew baggage on the fwd cargo only.

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Only the takeoff thrusts I get from TOPCAT, I let the FMC do my V-Speeds. I've also tried similar settings with flaps 5 as well.
When I tried to use TO2 yesterday, I got a "V Speeds not available" message.Did you get that message?I presumed there was no automatic calculation of V Speeds with TO2.Although I may have made an error somewhere.

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With your settings and -600 model I have a GW of 116000lbs (with your weights), and a trim of 6.71 units (given by clicking on FMC trim setting), flaps one speeds: 120 121 127. I had no problem at take off.PS: Single class configuration.

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Still no luck. I emptied the -600 of everything besides some fuel to take me from EDDF to EHAM. I will do a reinstall and see what happens.

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