How much does smoke oil weigh ?
- Strava
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How much does smoke oil weigh ?
But, when I set the smoke oil weight to anything other than zero it can't hardly get off the ground.
I have tried 1kg all the way down to 0.0001kg and it makes very little difference.
Even at 0.0001kg I can just barely get it to climb a little with out stalling.
Any ideas what might be wrong?
(the crop duster version of the cub has 100kg of smoke oil and still flies OK.)
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Re: How much does smoke oil weigh ?
Obviously the capacity in which an aircraft can hold depends on the size of the tank. Usually ranging 3.5 gal to 8 gal. I have flown a Super Stearman with a 25 gallon smoke tank. For a Piper Cub, I imagine it would be a 3.5 gal tank so your total smoke oil weight would be 28 lbs (12.7 kg).
How well this converts to YSFlight .dat files, that I do not know. They're too wonky for me.
- decaff_42
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Re: How much does smoke oil weigh ?
That being said, I'm not sure how the smokeoil parameter changes things...will probably need to be tested
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- waspe414
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Re: How much does smoke oil weigh ?
EDIT: It was added in the 2002 version, but the value of SMOKEOIL has no effect even in that version, with the exception of SMOKEOIL 0.0kg unloading smoke by default. From the start smoke has weighed 100kg.
At any rate, it appears to do basically nothing. If you have issues with the .dat and want me to look it over, toss it on up here.
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Re: How much does smoke oil weigh ?
OK, so smoke oil is either 0kg or 100kg.
So maybe 100kg is more than the cub can lift.
So, i tried reducing the clean weight by 100kg to compensate.
This should net out to a zero change in weight.
But that made no difference.
It still only gets a few feet off the ground and won't climb.
Something is wonky with smoke oil.
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Re: How much does smoke oil weigh ?
If Smoke Oil Weight is 0, you won't be able to draw smoke at all.
What is the Clean Weight and Payload Weight and Fuel Weight according to the DAT of your aircraft?
Can you supply the DAT Code for investigation/testing?
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Re: How much does smoke oil weigh ?
- Strava
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Re: How much does smoke oil weigh ?
That is the dat I am trying to add smoke to.
I think Gunny is right. Smoke is either on and 100kg or off and 0kg.
I did some tests with the stock eclipse to try and check this.
My test procedure is:
Apply full throttle.
Taxi to 80kts.
Pitch up until the vertical speed starts to go up.
Start timer/stopwatch.
Control pitch to maintain 80kts to altitude of 1000ft.
Stop timer.
Her are some results listed as time in mm:ss and comments on the conditions of the test:
1:00 baseline stock eclipse
1:23 add smoke in loading screen
1:26 smoke=10kg in dat
1:27 smoke=100kg in dat
1:26 initload=100kg in dat
I would accept all of the 1:2x times as equal and say the smoke is always 100kg.
So how to compensate to keep the perfomance the same?
How about adjusting WEIGHCLN ? I should be able to subtract 100kg from the total weight for a net change of zero.
1:15 smoke=100kg WEIGHCLN=630kg-100kg=530kg
1:10 smoke=100kg WEIGHCLN=630KG-200KG=430KG
That helps but even subtracting double is not enough. It also breaks the laws of physics :-p
How about the WEIGLOAD variable? I am guessing this defines the how much payload the plane can carry.
1:25 with WEIGLOAD values from 0 to 500 !
So WEIGLOAD is not used at all.
Adding 100kg to the fuel load also had no effect
1:00 weigfuel=200kg
I do wish we could get an accurate explanation for these variables and how they interact with each other
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Re: How much does smoke oil weigh ?
- decaff_42
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Re: How much does smoke oil weigh ?
I've been working on that for a while now and I have made some headway.I do wish we could get an accurate explanation for these variables and how they interact with each other
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- waspe414
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Re: How much does smoke oil weigh ?
Decaff and I are looking into this more.
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Re: How much does smoke oil weigh ?
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