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[Thrasher]

BAT 4.2.2

I've had an issue over the past couple of months that seems to be getting worse.  I did ask this question before but it remains unresolved so I thought I'd try again LOL

This problem doesn't affect all planes.  Mainly heavy bombers and last night the Super Sabre.

I'll describe one typical case that illustrates the problem.

A few nights ago we flew a mission involving the B26.  Three of us lined up on a particularly wide runway.  I performed all my preflight checks then announced "Rolling".  Full throttle, 100% prop pitch, just a little flap, rudder trim...All good CHOCKS AWAY

I started running down the runway only to see the other two pilots go tearing past me like a bat out of hell.  I got to 85mph then the engine seemed to slow down  80mph   78 mph.  abort, abort.

I had three attempts to get off the ground and could never get enough speed.

Last night we were flying the Super Sabre and everybody achieved lift off at 140 knots, The fastest I managed was 110knots

NOW it's important to note that everything in my gauges and the HUD in the bottom right corner all indicated that I was about to blow every gasket in the engine but I just couldn't get enough speed to lift off.  It's also note worthy that I tried this with engine management turned off so that I didn't get engine overheats.

I'm now wondering if my throttle is at fault but if that was the case the sim wouldn't register that I was 100% throttle.

This is really starting to get to me.

Has anybody else ever had this problem?

[tomoose]

Thrasher;
I know it's a jet but it really sounds like a prop-pitch issue.  Is there any chance that something you use for prop-pitch settings may be interfering with your jet operation.   Highly unlikely I know but.... 

[vonofterdingen]

Do you used rudder pedals? If so, check your calibration to ensure that your brakes are not dragging.

[genXgamer]

I would say brakes are engaging.

Like you said throttle registers 100% and you tried complex engine management turned off (can't be prop pitch) in the case of heavy bombers.

If the others have the same aircraft and fuel/bomb loadouts and are not having the same problem as you, then that's the only thing I can think of.

[Frankiek]

It sometimes happens if you engage autopilot at mission start and then switch to manual control that the brakes stays engaged try tapping on the brake key before accelerating

[genXgamer]

G'day Frankiek

When this occurs to me I find the aircraft barely moves at all, even at max throttle.

Thrasher seems to be able to get some speed up, although he mentions it then decreasing.

Well worth a try though, it will be interesting to see if this fixes the problem.

[gunny0134]

From that point of view, I am not assigning a brake function to my rudder pedal. The brake is only operated by the manual key.

If the rudder pedal has a brake function, there are cases where the brake is applied without even realizing it.

In this case, it is said that the engine sound is mixed with the brake noise when taking off.

However, it is difficult to detect the sound in the old ear.....

[Thrasher]

Hi guys, thanks for this. I really appreciate the discussion.

I too had considered the issue of break binding. However I had dismissed it from my mind (sort of) simply because I only have the problem when flying 'heavies'.

But...I have been flying for so many years (about 20..Gd that long?) that I fly hands and feet instinctively without even thinking about it. I fly a plane the way a pianist plays the piano. I don't look at the keyboard or controls or even think about it, I just do it.  But that does raise the question of "bad habits"  Have I developed the habit of moving my feet too far forward on the pedals when flying the big boys, thereby touching the breaks?

Or is the calibration of my rudder pedals off? - but if that was the case my breaks would bind on all planes.

This business of flying by instinct is a bitch. For years I've had my prop pitch on my quadrant but that developed a fault (time for a new one) and so I moved the prop pitch to another key.  But now I'm constantly going to the quadrant to change the PP and have to think "where's the bloody PP key?"

Experiment:  I'll take the breaks off my pedals and use the space bar.  But the above paragraph will be magnified but a factor of 2. LOL   I'll try it though.

cheers guys

[genXgamer]

G'day Thrasher

Moving braking from rudder pedals to keyboard, I can see an Air Crash Investigation episode coming up!

[Thrasher]

WOW!!!!!  Isn't that interesting.   I fly with my heel on the back guard of the peddle just like the old Yak, so am I pushing forward on the break?

Yikes!

[Thrasher]

Well thank you genXgamer  that video solved my issue. And to everybody else of course for suggesting the breaks.

I unmapped the breaks from my pedals and  BINGO!  No problem.  I have now remapped them to my pedals but now reposition my heels so as not to put forward pressure on the foot plate.

Brilliant!!