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Author
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Topic: Wanted FM Tutorial
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Bryan Russell
Pilot
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posted 04-25- 10:06 PM
   
Maybe its just me but I think it would really help if there was a tutorial on exactly how to test a FM. I mean its no good tweaking it to death if you don't know whats wrong. Maybe a standard methodology to test various things. Two things in particular that I just guessed at are: 1. How to test max climb rate. 2. How to test the stall speed. When is the exact point of stall anyway?
As you can see I know nothing, so every little bit helps.
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Royohboy
Pilot
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posted 04-26- 03:03 PM
I second that. Gathering lots of data on one aircraft is one thing, but flight-testing is another. If the climb-time to a particular altitude is 17 mins, how do I test this, i.e. at which angle and speed do I climb, do I start from the ground, etc.IP: Logged |
Zurawski
Pilot
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posted 04-27- 09:41 AM
Tail got the begining of one ...SV "planning"/has started one ... And if you check the main forum for these threads: "TAKE THE GREAT FM CHALLANGE" & Zur's OPS Tips'n Tricks" ... You'll find some great info! ... Otherwise email me or ICQ me and I'll get ya going! IP: Logged |
Tailslide
Pilot
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posted 04-27- 10:48 AM
1. Climb rate is tested from a stop on a full tank. Usually it'll say 3 minutes to 10,000 feet and 2 minutes to 5,000 feet or something like that. You'll also come across initial climb rates which can be tricky to test for. I climb through 1000 feet at my desired climb speed and continue for one minute, subtract 1000 from my alt. 2. Fly level, gradually reduce throttle until you can no longer maintain altitude no matter how hard you pull back. If possible, I'd test for stall speed with no flaps, no gear as having flaps down throws a lot of other variables into the equation. TS
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Bryan Russell
Pilot
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posted 04-27- 09:13 PM
quote:
1. Climb rate is tested from a stop on a full tank. Usually it'll say 3 minutes to 10,000 feet and 2 minutes to 5,000 feet or something like that. You'll also come across initial climb rates which can be tricky to test for. I climb through 1000 feet at my desired climb speed and continue for one minute, subtract 1000 from my alt.
Do you mean you start on the ground, and have to take off? So its basically the fastest the plane can get there then, which if thats right means the tester needs to know how to fly to get the best climb rate. quote:
2. Fly level, gradually reduce throttle until you can no longer maintain altitude no matter how hard you pull back. If possible, I'd test for stall speed with no flaps, no gear as having flaps down throws a lot of other variables into the equation.
Wow, I even got this one right. The amazing thing is that the Hurricane came quite close to the stall specs without me doing much more than adjusting the engine power, the weight etc etc to spec. (and a guess at how much more drag and lift the Hurri wing produced) Thanks TS!
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Tailslide
Pilot
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posted 04-27- 10:07 PM
1. Yes.. this makes climb rate the trickiest and most time consuming thing to test.
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