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Old 07-10-2012, 04:36 PM   #1
waterfire
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Default lateral balance Question

When you balance a plane like the 4*, do you do it upside down by the prop shaft and tail gear? When balanced level, if a wing is touched should it drop, no matter which side? I think I have mine balance correctly, when done, both weighed the same and it stayed level unless I breathed on a wing, then it would roll to the side I breathed on. This is a big MF to hang from a string, I put a hook in the ceiling to do it.
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Old 07-10-2012, 04:45 PM   #2
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This is what I started doing to all my planes since I started flying IMAC. Takes some time but well worth it. There is a article that goes with this chart I can upload as well if you want.

Mike


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File Type: pdf Trimchart.pdf (343.4 KB, 61 views)

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Old 07-10-2012, 05:26 PM   #3
Wildflyer
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Thumbs up Trim and adjustment chart

I would like to read the full article, I think it be helpful to many people with full built up stunt planes. Small foamies may not need all this adjustment, but this is vital to having a plane that is a true joy to fly.

I have talked to other IMAC flyers, and similar people, some have told me it may take close to 50 flights to get the plane set up perfectly.

I am going to show this to the members of both clubs I belong to.

Thank you for sharing this

Dave R, Proud PGR rider.
When you have flying skills like mine,
You become a master at repair.
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Old 07-10-2012, 05:41 PM   #4
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Default

Originally Posted by waterfire View Post
When you balance a plane like the 4*, do you do it upside down by the prop shaft and tail gear? When balanced level, if a wing is touched should it drop, no matter which side? I think I have mine balance correctly, when done, both weighed the same and it stayed level unless I breathed on a wing, then it would roll to the side I breathed on. This is a big MF to hang from a string, I put a hook in the ceiling to do it.
Hey, that PDF file is good info!

As for me, just did a quick calculation with my giant Big Stick and it's Hacker A60 motor. The prop is a 19X12, turning at 7100 RPM.

Just spinning up the motor at full power is the same as putting a one pound weight on the left wingtip, due to the torque effects from that motor.

DennyV
Retired and the days are just too short, busier than ever!
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Old 07-10-2012, 05:45 PM   #5
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Here is the whole article. Fifty flights sound about right but it can be done quicker by some of the guys I know.

Mike


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File Type: pdf PGoldsmithTrimming.pdf (56.2 KB, 50 views)

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