The A2A Simulations Community

Been flying the cub a lot but only now did I notice the aircraft tilting its wings way too much towards the left (wings rolling to the left during takeoff roll, while main gears are still on ground !! This seems to be worse when the fuel is light (like 30%) as compared to full tank. Am I the only one facing this odd issue ? (Let the cub runs till it lifts off on its own and see; don't touch the joystick, only rudder control). The wings really could roll and tilt till it almost hits the ground !

Only reason I could think of is the torque effect causing the roll, is this right ? If it is, is it too overly modelled ? Or is the left tire getting too soft ??

My joystick setting seems perfectly okay, and no such problem in other aircraft like the RealAir Scout.

Avio

Hi there, I don't suppose you're using real world weather? The only time my Cub dips a wing this hard on takeoff is on really bumpy ground or with a stiff crosswind.

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In theory, theory and practice are the same. In practice, they are not.

i have seen that a couple of times. it seems like a bug.

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This has happened to me quite a few times. I have re-calibrate my joystick every time and that has fixed the problem straight away.

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Intel Core i7 3770K | 16GB DDR3 1600 | Nvidia GTX470 | 24" LCD Monitor | 2 x 1TB HDD, 1 x 500GB HDD | Windows 7 Profession 64 bit

I didn't have this problem before, and I am beginning to think could it be due to my occasional switching to RealAir Scout, which requires P-factor and torque to be set at no more than 50%. After which, I could have done a flight in the Cub forgetting to set it to full. But I did subsequently reset to full realism. Not sure if this ended up causing the over-response seen in the cub.

If this is indeed the cause, I hope A2A would do something to correct it. My joystick setting / calibration seems to be perfect.

For now, any idea how I may fix this ? And if I have to uninstall the Cub, what is the best way to uninstall ?

Avio

This has happened to me before and I thought it was a gust of wind lifting up my right wing. If there's a lot of wind, try to hold your stick "into the wind" , in other words, keep the right wing's aileron up so the wind can't lift it. That's how it's done in real life, but this seems to be a bug in the game...though I dont' know...it doesn't happen all the time...

I am totally positive that there is Zero wind as each time I had the weather set to clear sky, and confirmed with shift-z readout. And very positive too my joystick is in perfect cal via testing.

This appears quite certainly to be a bug then. Hope A2A would see this post and gvie comment on it and if necessary, work a fix into the coming patch. In the meantime, I hope too that someone or Scott could advise those affected on whether if there is an interim work-around solution short of uninstalling and re-installing the Cub.

In my view this is a serious bug that detracts from the overall near real world realism that this community has come to expect from this stunning modelling of the Cub. Imagine having meticulously planned out a perfect flight, only to veer left like having a punctured left tire on takeoff roll ... Could really spoil the experience before it could begin.

Avio

I also have had this problem but noticed it only happened after I ran up to the runway on grass. The first time I thought it was a flat tire. I have been able to do this pretty much consistantly. The only way I found to get the wings level again was to go back on the grass and VERY carefully go back on the runway! Seems quite odd!

Ted

We do have ground bumps modeled in Accu-Sim, so when you roll off the runway, we are modeling the Cub going over bumps and divits. Is this what you are referring too? If this is something different, can you give us the exact steps to reproduce it? The update is just around the corner and so far, we have no sign of bugs in this area.

Scott.

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A2A Simulations Inc.

I have only encountered this with a cross wind. I fly with tundra tires only.
The wings do roll on the uneven terrain I tread across in the bush. More so as the ground gets rougher.
I have never had a wing dip on takeoff unless there is wind in the equation. As for the dip in the cockpit (me) ...well that is a different story
Using ASA real world, X52 stick + throttle (calibrated)
Strange that you are running into this W/O wind.

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Chad (PAFA)

I understand that Accusim also models flat tires. Maybe you landed too hard and that's what you are experiencing?

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Happy Landings
- Patrick

My airframe shows some 10+ hours of flying to date, and for the 10 hours of flying I definitely DID NOT encounter this strange problem, whether taking off from rough or even runways. I have been doing quite a lot of flights from dirt strips that's bumpy though.

And as mentioned in earlier post, if there is any suspect, it would be that I have been alternating my bush flying with the RealAir Scout, which requires realism setting for P-factor and Torque at no more than 50%. There were a couple of occasions when I forgot to set those back to 100% when getting back in the Cub, though subsequently I did set those back to 100% when flying in the Cub. It's roughly around that time that I saw this problem.

And this problem could be experience even on International runways that are definitely even and smooth ! It's a problem that seems intermittent though (meaning it was observed on some smooth runways, but not others). (No passenger, just a full baggage load, with pilot of course ).

As for the modelling of flat tires, is that really so? I don't read about this in the manual. The effect seen indeed felt just like that of a flat tire, in this case a flat left tire. In fact I was thinking it would be so cool if tire damage and wear and tear could be modelled as well, with feature to "change tire" in the Accu-Sim pop up. That would be really nice !!

In any case, it is a very real and annoying problem. It is what I would call a "show-stopper", at least in my opinion, and I really hope a fix could be found soon and included in the upcoming fix. Thanks.

Avio

I have had something similar happen a few times. After I've landed, turned off of the runway, and stopped, the Cub will settle to one side. It will stay this way until I reload the Cub. If I go to an exterior view, the tire appears to be flat. I have heard that flat tires are modeled. But, it isn't mentioned in the manuals, and I've never heard it confirmed. I also don't think I landed hard enough to get a flat tire. If I did, student pilots in the real world must get flat tires all the time. I have an issue with my Cub that causes it to reset the engine/airframe hours when I reload it. It seems as if you don't have that issue, though. Maybe you got a flat tire, and it was saved. Mine is back to normal after I reload it, because mine doesn't save my hours. I've never tried to take off after this happened, but the next time it does I'll try it. I'll try some hard landings and see if it happens. Then, I'll post the results.

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The issue cropped up whether it's a loaded saved flight or a brand new flight.

A strange problem.

Avio

Here are the results of my test flight. It does indeed seem to be a flat tire. When I land the Cub hard on grass, one of the tires will go flat. I wasn't able to flatten the tires on pavement, but I think it has happened on pavement before. I then tried to take off afterward, and the wings rolled in the direction of the flat tire. After I reloaded the Cub, the flat tire was gone. It's strange that this feature isn't mentioned anywhere. It's also strange that there seems to be no way of fixing it, other than reloading the plane.

I guess my landings aren't as good as I thought. I think I flare too high when I make three-point landings. I'll have to work on that.

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