Dead ASI

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Ron Attwood
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Dead ASI

Post by Ron Attwood »

During the flight this evening my air speed indicator stopped working. Aagh, I thought, pitot heat. After 10-12 minutes still no ASI. It certainly made for an interesting landing! I checked the hangar and the chaps in there told me the plane was in perfect condition. I did a walk round, checked the pitot and the circly thing turned red. Mmm, must mean it's hot. Took off, still no ASI. Flew some more with pitot heat off. Landed, checked the pitot again. This time the circly thing turned blue. Cold obviously.
In the end I shut P3Dv4.3 down and started again. ASI reported for duty as it ought.
I've never seen this before and it's likely I wont see it again but...
Any idea why this would happen?

This is on a pristine install of P3Dv4.3 and A2A airplanes.
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Tomas Linnet
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Re: Dead ASI

Post by Tomas Linnet »

maybe it’s because the pitotheat can keep the ice away, but needs a long time to clear a massive build up?
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Ron Attwood
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Re: Dead ASI

Post by Ron Attwood »

In fact there was no icing involved. A nice warm, summer, low altitude, cloudless(almost) sky. Would you say 10-12 minutes was long enough to clear ice it the conditions were appropriate?
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Tomas Linnet
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Re: Dead ASI

Post by Tomas Linnet »

I don't really know, I've never flown into potential icing without the heat on. I just think this has been brought up a while ago, but if you didn't fly in icing conditions, then there must be another problem
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Tomas

Sim: FSX SE
Accu-Sim aircraft in my hangar:
C172, C182, P51 Civ, P51 Mil, B17, Spitfire, P47, B377 COTS,
J3 Cub, T6, Connie, P-40, V35B
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Raller
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Re: Dead ASI

Post by Raller »

All circuit breaker pushed in? Is there a circuit breaker only for the air speed indicator?
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LZ-WIL
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Re: Dead ASI

Post by LZ-WIL »

Hi Ron,

Or perhaps a fat and clunky fly met it's doom in your pitot tube. :mrgreen:

Cheerz,
Will
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Oracle427
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Re: Dead ASI

Post by Oracle427 »

ASI uses no electrical power, so no possibility of a CB being the issue.

Chances are this was a software glitch.
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Ron Attwood
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Re: Dead ASI

Post by Ron Attwood »

Oracle427 wrote:
Chances are this was a software glitch.
That would be my guess.
Eva Vlaardingerbroek, an inspiratiom.

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Lewis - A2A
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Re: Dead ASI

Post by Lewis - A2A »

Are you using a weather engine? Sometimes though thankfully rare I've seen this pop up when using weather injection, something will ice up and not clear without a re-load.

thanks,
Lewis
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Ron Attwood
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Re: Dead ASI

Post by Ron Attwood »

Hi Lewis, yes, AS4 always have, always will. :D Like I said, I've never seen it before. Even though there were no icing conditions?
We'll let it drop because I don't think it'll happen again. If it does....
Eva Vlaardingerbroek, an inspiratiom.

flapman
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Re: Dead ASI

Post by flapman »

Ron Attwood wrote:Hi Lewis, yes, AS4 always have, always will.
I've had this happen, and I've heard of it happening before. Somewhere Active Sky and A2A code is conflicting, where AS will freeze a pitot tube, but will not remove the blockage after pitot heating is applied in the A2A aircraft. Yet, if you have pitot heating active when you encounter icing conditions, AS will not block the pitot tube. If AS blocks the pitot tube, my understanding is that it cannot be cleared until a reset of the simulation.
I don't know if this applies to other aircraft, but if I have my Active Sky (Next) running I make sure the pitot heat is on 8)

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Paughco
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Re: Dead ASI

Post by Paughco »

I use AS_P3Dv4 and have had this happen once in the T-6. Gone after a tricky landing then a restart.

Seeya
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Ron Attwood
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Re: Dead ASI

Post by Ron Attwood »

Oh, they;re all coming out of the woodwork now! :D
Eva Vlaardingerbroek, an inspiratiom.

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