The never ending engine thread, East-West - Page 1727 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 11-26-2014, 01:47 PM   #17261
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Re: The never ending engine thread, East-West


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Quote:
Originally Posted by super08 View Post
The nicest flying plane I have is my Pilot 260 and that is how it is balanced. Hands off inverted. It also does KE with no mix programmed in as the amount needed is so small it would be a waste of time programming it in.
All good planes are like that no!
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Old 11-26-2014, 01:50 PM   #17262
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Re: The never ending engine thread, East-West

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Originally Posted by Eye Can Fly View Post
Wouldn't CG the depend a bit on the pilots ability to be able to know what to do in the "oh crap" situation? I set up the plane close to the manufacturers specs, then tune to taste (for me a wee bit of up stick on a 45 degree inverted line) after the maiden. Will never forget my first gas powered flight, hammered home the ole rule about the one tail heavy maiden.

But then again, I only had cheap planes.
Kind of. A plane that is nose heavy will point it's nose towards the earth when you stall or get into a little trouble. A plane that is tail heavy will point it's nose to the sky when it stalls or is going slow. A neutrally balanced plane falls down nose slightly up or flat.
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Old 11-26-2014, 02:21 PM   #17263
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Re: The never ending engine thread, East-West

The inverted flight thing always bugged me. Again, depending on the plane, wing location on the fuse, and where the mass is relative to the datum line.....

As have to assume Trevor is talkin' about a mid-wing plane. Correct?
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Old 11-26-2014, 02:21 PM   #17264
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Re: The never ending engine thread, East-West

A noise heavy plane also lands a lot faster
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Old 11-26-2014, 02:52 PM   #17265
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Re: The never ending engine thread, East-West

Don't ask Dan about cg he always just said it's good lol
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Old 11-26-2014, 03:05 PM   #17266
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Re: The never ending engine thread, East-West

I tested the cg of my aeroworks electric by hovering it. If it loved hovering and massive snap rolls....then I was good. When I flip it inverted it wants to climb....so my guess is I am WAY tail heavy but I like it.

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Old 11-26-2014, 03:07 PM   #17267
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Re: The never ending engine thread, East-West

Over on the Scale Aerobatics thread I was given good advice on plane set up. A guy By the name of Peter Goldsmith developed a sequence of tuning up your plane for flyin' SA.

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Name:	PGoldsmith on trimming.pdf
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ID:	484097


While this isn't everyone cup-o-tea it sure helps get a sport plane flying right.

As I am not a 3D kinda guy, I have to ask, if a plane is set up with the CG neutral on inverted flight, and the is enough elevator and rudder throw, will the plane hover vertically? Or doe s the it have to be slightly tail heavy?

Last edited by Eye Can Fly; 11-26-2014 at 03:33 PM.
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Old 11-26-2014, 05:03 PM   #17268
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Re: The never ending engine thread, East-West

A plane that flies hands off while inverted is not necessarily a good thing, it induces some other issues. Airplanes with a CG on the tail heavy side, don't track well and usually snap weird, spins weird and it feels weird all the way around to me anyway. They give you the impression that they 3D well mainly because they are not moving forward that much but through the paces it will show its true colours.

As for 3D flying, i.e rolling harriers, hovers etc, I don't really see a huge advantage on a tail heavy airplane, it might be a bit easier I guess but I personally set my plane (gasser) with the cg a tiny bit on the nose heavy side, it tracks better, snaps better, less coupling issues on knife edge etc.

At the end of the day the CG has to suit your flying style, that's the key!

Too nose heavy airplanes, fly poorly, too tail heavy airplanes only fly once!

Cheers,

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Last edited by VA6WGO; 11-26-2014 at 06:48 PM.
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Old 11-26-2014, 06:23 PM   #17269
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Re: The never ending engine thread, East-West

Especially when they became tail heavy because the engine fell off.
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Old 11-26-2014, 06:26 PM   #17270
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Re: The never ending engine thread, East-West

Cool guys! Neat to see everyone's little tricks and tips!!
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