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Old 01-03-2021, 11:19 AM
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Originally Posted by TimBle View Post
How will you achieve this with the canopy in place?
The first Pilot Kits that came out used a generic manual that quote the same CG for each airframe that came after it. This was corrected per airframe and the CoG location is laster printed into the sides of the main load box running down the fuselage. Does your YAK have this marking ? A circle with a cross hairs through it.

Page 38:
https://pilot-rc.com/Downloads/50cc.pdf
No it dosent have marking like on my other Pilot planes.I take the string on the outside of the fuselage and then i slide the wings on so it touching the string,wings dont come all in but close.
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Old 01-03-2021, 11:40 AM
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Originally Posted by AHicks View Post
Pretty touchy aren't we? Tough holiday?

I was agreeing with your idea of moving the CG forward from suggested. No more, no less. If I bent your brain suggesting going as far as the front of the tube, my apologies.

My main point, was that the right CG is going to depend on the flyer. After 15 years or so of flying very similar planes, and helping many others with CG issues, clearly, I don't need to be familiar with this particular plane to know that. I would be willing to bet the plane could be flown successfully by anyone with the skill to fly something like this with the CG on the front of the wing tube. We ARE talking about a CG for a maiden, right? Something to let you fly and start your testing? -Al

exactly.

The suggested CG is pretty conservative anyway and is way ahead of the Neutral point of aerodynamic surfaces. The plane still flies well with the CG behind the suggested 183mm.
People get bent out of shape with these data points and then neglect all the other balance requirements to make a plane fly straight and level without much need for trim correction.

CG on the front of the wing tube is even more conservative and will likely require elevator jockeying to get the land nice and smooth. The trouble with this is that inexperienced pilots then bring it in too slow, use too much elevator and it stalls out of the sky either smashing a wing or the landing gear.

Advice has been given. I'm out
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Old 01-03-2021, 12:16 PM
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Agreed Timble, too far forward often translates directly to hot landings.



I've said my piece as well.
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Old 01-03-2021, 03:27 PM
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Quote:
Originally Posted by ronaldopn View Post
Reka, I just remembered there is this CG calculator from Ecalc. You may use it as a double check for additional peace of mind on the maiden.
Ronaldo
Dang, give me a tape measure and a piece of paper and I could calc the CG is less time than it takes to use that program. Seems overly complicated to me. Calculating CG must be another one of those lost arts in modern RC flying.
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Old 01-03-2021, 04:52 PM
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I agree, Id calculated it much faster using basic geometry but just wanted to provide a reliable source which could be used by anyone.
Ronaldo
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Old 01-04-2021, 12:52 AM
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Originally Posted by Truckracer View Post
Dang, give me a tape measure and a piece of paper and I could calc the CG is less time than it takes to use that program. Seems overly complicated to me. Calculating CG must be another one of those lost arts in modern RC flying.
ditto but its a great resource
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Old 07-31-2021, 11:19 AM
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I have the Pilot laser 88" W/S and the 67" W/S. When I balance both planes using the C/G marking with the carbon fiber tube through the pre-drilled holes in the fuse and wing, both planes on the maiden flight came out very tail heavy. I recommend balancing at the center of the wing tube or just in front of the tube.
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Old 07-31-2021, 09:59 PM
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I’ve got a pilot yak 50cc. Balanced on the wing tube. Can move further back. 1 of my batteries dislodged (2cell 2400mah lipo) and moved to the rear former of the fuselage. Didn’t realized but new something was afoot as it was the best 3D flight I’ve had to date. Plan on relocating that battery to the same former just securing it in a mounting plate.
D.
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