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Piper PA28 Warrior II

Questions and discussion about creating aircraft. Flight dynamics, 3d models, cockpits, systems, animation, textures.

Re: Piper PA28 Warrior II

Postby wkitty42 » Mon Dec 21, 2020 2:43 pm

while the item may appear in the craft, the modeling of how it works isn't... some folks do textures... others do animation... some do both... in this case, apparently the animation for actually using the item hasn't been done for one reason or another...
"You get more air close to the ground," said Angalo. "I read that in a book. You get lots of air low down, and not much when you go up."
"Why not?" said Gurder.
"Dunno. It's frightened of heights, I guess."
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Re: Piper PA28 Warrior II

Postby Robertfm » Mon Dec 21, 2020 3:04 pm

Ok
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Re: Piper PA28 Warrior II

Postby Robertfm » Thu Jan 21, 2021 4:15 pm

Reported on another thread plane failing to stop with parking break and main breaks on runway ENBO. Tested by another who doesn't get an issue with a different plane. Could there be a bug in the code intermittently.
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Re: Piper PA28 Warrior II

Postby Knüppelrührer » Thu Jan 21, 2021 5:38 pm

similar with other light airplanes, ok when using fair weather.

Just a bit slippery ;-) Norway - winter - ice ;-)

Edit.: Nonsense. 36kts gusting 51kts. No ice needed to cause trouble.
Last edited by Knüppelrührer on Thu Jan 21, 2021 5:43 pm, edited 1 time in total.
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Re: Piper PA28 Warrior II

Postby Robertfm » Thu Jan 21, 2021 5:43 pm

It did it with the engine off without any other control inputs merely loading FG to the airport.
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Re: Piper PA28 Warrior II

Postby Knüppelrührer » Thu Jan 21, 2021 5:56 pm

My edit crossed with your posting.

Recommend cancelling today's flight.

In any case not an aircraft issue.
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Re: Piper PA28 Warrior II

Postby Robertfm » Thu Jan 21, 2021 6:06 pm

Winds no where near at the time, showing 15kts
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Re: Piper PA28 Warrior II

Postby Knüppelrührer » Thu Jan 21, 2021 6:23 pm

2021/01/21 17:50 ENBO 211750Z 10034KZ 99 - SN FEW030 ST100 BKN200 M06/M12 Q0989 TEMPO 11040G50KT
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Re: Piper PA28 Warrior II

Postby Robertfm » Thu Jan 21, 2021 6:30 pm

I started FG on that airport about 11 am UK time.
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Re: Piper PA28 Warrior II

Postby D-ECHO » Fri Jan 22, 2021 7:51 am

I tested this at Friedrichshafen (EDNY): For the following conditions:
4 deg Celcius OAT
1370ft AMSL
Wind 0kts
the flight manual describes a landing roll of about 180m, given a touchdown at stall speed (=about 50kts IAS at the used configuration) with flaps 40 deg, heavy braking and a dry, level, paved runway.
A quick test resulted in about 140m landing roll, which is actually a bit too low. I will try and adjust the respective values if this persists in multiple tests.

Please note Knüppelrührer's comment above, wind can greatly increase landing roll, e.g. in the example above, only 5 kts of tailwind would have increased the landing roll by AFM to about 240m (!). In case you encounter this again, please note down, or make a screenshot, of the property browser with environment/ opened, especially showing the lower half with the property wind-from-heading-deg, wind-speed-kts etc.
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Re: Piper PA28 Warrior II

Postby Robertfm » Fri Jan 22, 2021 9:55 am

I wasn't landing or taking off. I had just loaded ENBO in FG And hadn't even got any further, the plane did a 180 on the runway. When I started the engine I struggled to do anything with the plane, I managed to turn it round and then it just went off down the runway and neither handbrake of main brakes stopped it, with throttle off.
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Re: Piper PA28 Warrior II

Postby Knüppelrührer » Fri Jan 22, 2021 10:02 am

because it was blowing the aircraft straight from the runway. Try with fair weather.

@D-Echo: Good idea to check that. I will also have a look.
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Re: Piper PA28 Warrior II

Postby Robertfm » Fri Jan 22, 2021 10:48 am

That doesn't explain why the brakes wouldn't stop or hold it. This is not the first time the planes brakes have not worked.
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Re: Piper PA28 Warrior II

Postby Robertfm » Fri Jan 22, 2021 10:58 am

D-ECHO wrote in Fri Jan 22, 2021 7:51 am:I tested this at Friedrichshafen (EDNY): For the following conditions:
4 deg Celcius OAT
1370ft AMSL
Wind 0kts
the flight manual describes a landing roll of about 180m, given a touchdown at stall speed (=about 50kts IAS at the used configuration) with flaps 40 deg, heavy braking and a dry, level, paved runway.
A quick test resulted in about 140m landing roll, which is actually a bit too low. I will try and adjust the respective values if this persists in multiple tests.

Please note Knüppelrührer's comment above, wind can greatly increase landing roll, e.g. in the example above, only 5 kts of tailwind would have increased the landing roll by AFM to about 240m (!). In case you encounter this again, please note down, or make a screenshot, of the property browser with environment/ opened, especially showing the lower half with the property wind-from-heading-deg, wind-speed-kts etc.


You show the stall speed at 50kts when in fact it actually stalls at 60kts on no flaps approach, my preferred as I have found previously flaps reduce the speed too low. This was reported many pages ago on this thread and others noted the same.
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Re: Piper PA28 Warrior II

Postby D-ECHO » Fri Jan 22, 2021 11:35 am

D-ECHO wrote in Fri Jan 22, 2021 7:51 am:... given a touchdown at stall speed (=about 50kts IAS at the used configuration) with flaps 40 deg, ....


On the aircraft being blown around by the wind: This may happen in reality, thus there are tiedowns and hangars :D As I have said previously, if you notice it again, take a screenshot with the property browser showing current wind speed and direction.

[EDIT] And for the sake of completion, you can open a second property browser showing fdm/jsbsim/fcs, especially the values of left-brake-cmd-norm and right-brake-cmd-norm, this would show whether there is any problem in this area.
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