Single Engine RPM good but drops during takeoff run

[CondorBill 0]

New member here so I hope I'm doing this correctly.

I have FS2020 and TB Velocity One yoke and quadrant. Have been trying to make my own profiles and thought it was going fine. However, if I do a flight in a Cessna 152 (or 174), the engine runs up fine and stays there in the green. I release the parking brake, go down the runway a short distance and the engine RPM drops towards idle. Pulling the throttle knob at random I can often get the engine RPM back up. If the plane is in the air all works normally. 

I don't see any controls that are "cross-linked" but I'm a real noob at this. The throttle on the dash does follow the throttle knob on my TB quadrant but I believe it does move when the engine RPM drops.

Any ideas why my engine has a mind of its own, please?

[Glenn Fitzpatrick 3,799]

PC or XBox ?

What happens if you release the parking brake, touch nothing else and then throttle up ?

 

[CondorBill 0]

Thanks for the reply, PC is my processor.

I tried your suggestion and it did seem better but unfortunately I'm at the stage where what's happening and tried are confused but your suggestion did get me investigating a bit more and I now know with certainty that the program is pulling the throttle back even if I'm touching nothing. I looked in Assists which are all set to the Easy mode but could not find anything specific about the throttle. I did a reset to defaults in the Assists but not sure if that really achieved anything.

I was taking off on a grass runway with no flaps so maybe it thought something was wrong and throttled back the engine. I also don't know if the engine RPM should drop a little as speed picks up. Right now it drops about 500 to 2000 RPM but then picks up - this is much better than before when I was having the trouble. Setting the flaps 10 degrees on a paved runway seems good so overall I think I'm (somewhat) happy and think the trouble is the program is smarter than I am. 

I also noticed if I try to adjust the throttle below about 1500 feet (likely still climbing) it won't let me - goes back to higher power. Above that altitude it works normally and dropping down below as in landing, it works fine too. I also notice that the flaps don't extend beyond 10 degrees on the ground before takeoff but are OK in the air above the 1500 feet - will go to 30 degrees. This seems to be another clue the program is smarter.

Thanks again

 

 

[mholden020 39]

When this happens do the graphical controls in MSFS show a change?  Like does the throttle move to idle on the screen without you moving your throttle control?

[Twenty6 708]

17 hours ago, CondorBill said:

I have FS2020 and TB Velocity One yoke and quadrant. Have been trying to make my own profiles

What version firmware is installed on the V1Flight? This was solved for me by updating to the current v1.40 firmware.

I've also found I have better luck with axis bindings when I duplicate one of the V1F default profiles as opposed to creating a new profile. I've changed to Lorbys AAO to control the axes but it seems the devs break these bindings when they update their plane so I have to fallback to MSFS Control Options until someone figures out the new variable events.

I also believe Turtle Beach suggests not using any pilot assists, ie:HARD not EASY with the yoke and throttle quadrant. Maybe you can find the exact message in their discord. https://discord.gg/a5XEguGK

[CondorBill 0]

Graphical controls do show change.

Forgot to look at firmware version just now, but V1 is new and it just did a firmware update to what I assume it is latest.

Yes, I did start out by copying a Default profile to keep the camera and similar settings for at least the present.

However, I did some searching based on the hard vs easy and did find on another forum where a similar problem was reported and turning off Assisted Take-Off was recommended. This looks like it did fix the problem and it also lets me move the flaps through their 30 degree range when on the ground.

[eslader 1,868]

Honestly, easy mode in MSFS is hard mode because you not only have to fly the plane, but you also have to fight your less than intelligent AI copilot for control. 😉

Edited January 30, 2023 by eslader

[CondorBill 0]

Thanks again to everybody. I had spent a lot of time trying to debug what I thought was my controller configuring.

I guess I'll have to bite the bullet and try flying with less assistance and see how that works out. At least I'll know it's my doing and not the FS copilot doing. 

[simtech209 25]

There be gremlins in the house. I first experienced this unexpected throttle back three nights ago. I was using the new JPL V2.0 152. In cockpit throttle would roll back after a few seconds. I use the Honeycomb Bravo. I also tried another AC.. same same. I do not use flight assist for anything. Nothing checked. Not sure if it's related, but I had selected the second AC from the developer's' dropdown. When the second AC exhibited same behavior, I exited to main menu, reselected AC and all was good. Strange.. for sure..