Turbo - No Fuel Flow

Black Square

Hi, everyone. I looked into this more today, and found the obvious: The fuel flow gauge is highly non-linear at the very bottom of its scale. Since these real instruments are full of real mechanical eccentricities, I've just added a little piece of "cheater" code to help boost the fuel flow indication just enough to read on the scale. Hopefully that should help eliminate any confusion.

rightseat

@Black-Square said in Turbo - No Fuel Flow:

@Woolies Deploying the flight simulation software emergency response team now

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I love the IT Crowd!

Black Square

@rightseat Remember: They're not just the emergency services, they're your emergency services

Voxen

I just noticed something today. First I started flying the turbo version of the commander and got that fuel flow needle not moving when priming (always). Then I switched to the normal version for a few flights, and there the needle is moving as expected. And today I have done another flight with the TC version and guess what: the needle was moving!
I can't find the logic there, but that is maybe something useful for you.

Voxen

Ok so with update 0.1.1 the issue remains. After installing the update and do a first test with the TC it worked fine, the needle was moving as expected. But today it does not. Tried 3 times on 3 new flights and that FF needle is not moving a bit.

Woolies

The change in new update seems to be good for me. Needle moves in NA and TC no problem.

rinkerbuck

I thought I remembered the TC needle moving during the prime sequence right after the patch, but now it never moves at all anymore.

Voxen

It moves randomly for me, maybe once every 10 flights. I can’t see any logic or pattern, it is just random.

Ratman

Turn off real-world weather and manually set the outside temperature while doing the prime. Try testing it at temperatures between 15°C and 20°C, and watch the needle to see if it goes up and down.

stedanko

Ratman nailed it regarding temperature sensitivity on the TC version. Well, it might be a couple things that need adjusting to be ideal. Procedure is to crack the throttle 1/4 in. and increase mixture to full rich to achieve > 5 GPH. Two things look to be working against trying to achieve that.

Fuel flow does not increase based on throttle setting until the throttle is up to around 80% and higher, thus cracking it 1/4 in., or even 50% open, is no different than keeping it fully shut off in terms of fuel flow and starting the plane. You just need some fuel flow during prime to start.
On the TC version fuel flow is dependent on outside temperature. The TC version looks to behave like the normally aspirated version at ~54F, where fuel flow peaks, and at temps below. As temp increases from 54F, fuel flow starts to drop when priming. Since its pretty damn hot all over the northern hemisphere right now, if you fly real world conditions, you're probably at > 75F on the ground. If temp gets high enough, fuel flow drops to zero until the conditions in #1 are met with the throttle up > 80%. These temp effects are not seen on the normally aspirated version as far as I could tell.