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Old Oct 18, 2011, 09:57 AM
There's magic in those wings !
khaled_abobakr's Avatar
Joined Nov 2006
4,851 Posts
Quote:
Originally Posted by StarHopper44 View Post
Sounds like it's slightly nose heavy to me.
Don't know your whole rig's setup but, I think you should be able to trim it out by sliding your LiPo back a little. I'd try sliding it back as far as I could get it, maybe program in a notch of up elevator trim & re-check glide. If the 'up' makes it work, set it there with your clevis adjustment so you can re-center your trim button on the Tx.

FWIW, I put 2 different-colored dots under my wing with Sharpie pens, representing 60 & 70mm....and when I went to add another dot for 62mm, it basically just made the 60mm mark look like an '8'. So, I put the 3rd in the center to represent 65mm. My point is, the whole 10mm span ain't all that wide, & if you draw it out on paper to see it visually, the whole span is smaller than the width of your fingertip, which most use to check balance before launching. Ergo, when we're talking 60, 62, 65 & 70mm settings, it's a pretty fine incrementing.

Please let us know how it works out for ya!
Thanks for the tips .. I'll do that and report back my findings .. ..

BTW .. Does the this mean I have to balance my plane using a more accurate way to actually feel the difference of these fine increments .. or you're saying it doesn't matter at all for the CG to be anywhere between 60 and 70 mm form LE.... ???!!

Thanks a lot

Khaled
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Old Oct 18, 2011, 11:26 AM
Space is the answer
ozair's Avatar
Australia, VIC, Warneet
Joined Mar 2011
368 Posts
Whilst were talking CG does anyone have the Great Planes CG machine?
http://www.ebay.com.au/itm/Great-Pla...item519b698c55

Your comments as to use and accuracy would be appreciated. I just cannot understand why its not suitable for planes under 2 lbs in weight, am I missing something?
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Old Oct 18, 2011, 11:42 AM
Row 0, Seat A
G550Ted's Avatar
Savannah, GA
Joined Jan 2008
2,741 Posts
Quote:
Originally Posted by ozair View Post
Whilst were talking CG does anyone have the Great Planes CG machine?
http://www.ebay.com.au/itm/Great-Pla...item519b698c55

Your comments as to use and accuracy would be appreciated. I just cannot understand why its not suitable for planes under 2 lbs in weight, am I missing something?
Oz ,

I don't have one but suspect that there is too much friction in the pivots for accuracy when balancing light models.

Ted
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Old Oct 18, 2011, 11:47 AM
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United States, CA, Sebastopol
Joined Dec 2010
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Quote:
Originally Posted by G550Ted View Post
Oz ,

I don't have one but suspect that there is too much friction in the pivots for accuracy when balancing light models.

Ted
Doesn't it just balance on the end-points?
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Old Oct 18, 2011, 11:52 AM
Registered User
bicyclemonkey's Avatar
Fayetteville, AR
Joined Jan 2010
473 Posts
I have the Great Planes CG machine. I used it for a while but went back to using the old finger method. There's almost no friction on the pivots and I've balanced small foamies on it with no problems.
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Old Oct 18, 2011, 11:53 AM
I used to like trees
rchank's Avatar
United States, WA, Spokane
Joined Jul 2011
288 Posts
Sky Surfer - Low and Slow

My grand daughter has been wanting to see Papa fly the "big white plane", so we went out to the wide open countryside a few days ago. It was a bit windy. My wife was taking video but was having trouble following the plane when it was up high. I brought it down low for some fly-bys and enjoyed flying the plane close to the ground.

low surfin' (1 min 39 sec)
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Old Oct 18, 2011, 11:53 AM
Argue for your limitations
ajbaker's Avatar
Lincoln, CA
Joined Oct 2006
8,424 Posts
Quote:
Originally Posted by Reegor View Post
This (graphics can't be upgraded) is normal for notebook computers.
True. But, I think his is a desktop.
AJ
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Old Oct 18, 2011, 11:54 AM
The figure "9" Specialist
aeronca's Avatar
A Barrier Island in New Jersey, USA
Joined Oct 2003
3,502 Posts
Quote:
Originally Posted by ozair View Post
Whilst were talking CG does anyone have the Great Planes CG machine?
http://www.ebay.com.au/itm/Great-Pla...item519b698c55

Your comments as to use and accuracy would be appreciated. I just cannot understand why its not suitable for planes under 2 lbs in weight, am I missing something?
I don't have one but IMHO it is worth the same and no more accurate than a 2x4 with two dowels and slip-on pencil eraser heads on the ends of the dowels.

Aeronca
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Old Oct 18, 2011, 11:54 AM
Row 0, Seat A
G550Ted's Avatar
Savannah, GA
Joined Jan 2008
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Quote:
Originally Posted by erkq View Post
Doesn't it just balance on the end-points?
It appears to balance on the pads at the top of the support arms. The small, ball tipped "feelers" at the ends of the scaled bars would be used to determine the distance from the pivot (CG) to a reference point on the model such as the leading edge of the wing. I may be wrong, but don't think one would place a 40# model on those tiny balls - ouch!

Ted
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Old Oct 18, 2011, 11:56 AM
Row 0, Seat A
G550Ted's Avatar
Savannah, GA
Joined Jan 2008
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Quote:
Originally Posted by aeronca View Post
I don't have one but IMHO it is worth the same and no more accurate than a 2x4 with two dowels and slip-on pencil eraser heads on the ends of the dowels.

Aeronca
+1.

Ted
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Old Oct 18, 2011, 11:59 AM
Argue for your limitations
ajbaker's Avatar
Lincoln, CA
Joined Oct 2006
8,424 Posts
Quote:
Originally Posted by rchank View Post
My grand daughter has been wanting to see Papa fly the "big white plane", so we went out to the wide open countryside a few days ago. It was a bit windy. My wife was taking video but was having trouble following the plane when it was up high. I brought it down low for some fly-bys and enjoyed flying the plane close to the ground.
Nicely done. Well timed. Up close and personal landing. Pay your wife $100 for the video. That is a terrific flying field. What was the switch doing that I keep hearing click on and off?
AJ
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Old Oct 18, 2011, 12:08 PM
Argue for your limitations
ajbaker's Avatar
Lincoln, CA
Joined Oct 2006
8,424 Posts
Quote:
Originally Posted by aeronca View Post
I don't have one but IMHO it is worth the same and no more accurate than a 2x4 with two dowels and slip-on pencil eraser heads on the ends of the dowels.

Aeronca
I agree. I have one of those low-tech balancers, too - Fits my needs just fine.
AJ
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Old Oct 18, 2011, 12:17 PM
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United States, CA, Sebastopol
Joined Dec 2010
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Quote:
Originally Posted by ajbaker View Post
I agree. I have one of those low-tech balancers, too - Fits my needs just fine.
AJ
Looks like mine, only I just drove nails through a board. Use it on my Bix and my Slick 51
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Old Oct 18, 2011, 12:26 PM
Space is the answer
ozair's Avatar
Australia, VIC, Warneet
Joined Mar 2011
368 Posts
Thanks guys, that answers my questions.
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Old Oct 18, 2011, 12:41 PM
I used to like trees
rchank's Avatar
United States, WA, Spokane
Joined Jul 2011
288 Posts
Quote:
Originally Posted by ajbaker View Post
Nicely done. Well timed. Up close and personal landing. Pay your wife $100 for the video. That is a terrific flying field. What was the switch doing that I keep hearing click on and off?
AJ
Thanks aj. My wife thinks you're a great guy I'm not sure what the noise was. It may have been the camera strap bouncing off some thing as the wind was blowing it around.

Ah, my flying field. I live in eastern Washington state near Spokane. There are innumerable acres of wheat farms and nobody seems to care if I just pull off to the side of a county road and unleash my planes. Some stop to watch and ask questions. Might win a few people over to the addiction hobby.

There's a nice hilltop flying sight on private land that I have permission to use. I did some slope soaring there one day with the Sky Surfer, but the wind was very erratic and I had to resort to power a number of times. I'll get some video some time when the winds are more favorable.
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