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Old May 24, 2013, 09:45 AM
Led Zepplin is offline
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Fly, dangit!!!
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Little Rock, AR USA
Joined Jan 2007
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Glenn - Looks awesome, sorry you have to redo that rigging! It will be worth it though, it is just too nice a looking plane to be a hanger queen. Hope you get it resolved soon.

J. B.
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Old May 24, 2013, 10:28 AM
angelix is offline
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that is nice!!!!!

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Old May 24, 2013, 12:12 PM
jingjingjing is offline
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I love my ID.
Fairfax VA
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Quote:
Originally Posted by PiperCub49 View Post
Glenn,

I went through a similar situation and it turned out that excessive positive incidence was at fault. Nothing looks sillier than a micro with 15* of downthrust!

Kody
Very nice looking camel. I just need to see it flying.
I agree with Kody but there are more things to consider.

I think wing incidence is depending on targeted speed of model.
Personally, I target my model speed as slow as possible for scale speed and indoor flying.
If wing incidence is too low at low speed, airplane needs to fly at high alpha position like 'Harrier' which looks awkward and draggy for scale ww1 airplane.
but side effect of high positive incidence is, as Kody mentioned, excessive pitching up at high throttle. An over powered prop may cause this problem more prominent.

I couldn't find any miracle solution to have positive characteristics of both low incidence and high incidence unless implementing variable wing incidence. My preference is slightly high positive incidence for correct fuselage attitude at scale speed and avoiding excessive throttle or over-powered set up. On the other hand, over powered set up can be easily overcome with proper elevator trim or mixing of throttle and elevator.

And according to short web search, decalage theory on biplane is obsolete as per 1930's NACA study. I keep my lower and upper wing at same incidence for better efficiency.

Very nice looking Camel. I just need to see it flying!
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Old May 24, 2013, 12:42 PM
PiperCub49 is offline
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Playing with AutoCAD!
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United States, ME
Joined Oct 2008
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Quote:
Originally Posted by jingjingjing View Post
My preference is slightly high positive incidence for correct fuselage attitude at scale speed and avoiding excessive throttle or over-powered set up. On the other hand, over powered set up can be easily overcome with proper elevator trim or mixing of throttle and elevator.
Getting the incidence right so that the fuselage is somewhat level can be interesting. I remember that when I had my plane flying at a scale airspeed, the tail was dragging around. I never thought of trying a throttle/elevator mix, though. Great idea!
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Old May 24, 2013, 02:21 PM
glewis is offline
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USA, FL, Tampa
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I agree, I want to trim the model to fly as slowly as possible.
I'll get some video of it here soon.
If the wind is calm tomorrow AM I'll get my granddaughter to shoot some video.
Hopefully it will fly better this time. It did want to fly fast. I hope the incidence change will help that. It did want to pitch up with throttle, but moving the cg helped some.
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Old May 27, 2013, 09:23 PM
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Test flew the model yesterday in less than optimal conditions. Had my 10 yr old grandson video the flight and he did a pretty good job. Was going to post the video here, but what happened to the videos forum? Gone.
Now what? Upload it to youtube? Great, something else to figure out how to do.
Model flew pretty good considering the choppy conditions. I'll know more when I can fly it at the club field and do a bit of cg adjustment. Think I can remove a bit of the nose weight.
Glenn
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Last edited by glewis; May 27, 2013 at 09:31 PM.
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Old May 28, 2013, 02:31 AM
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Yup, RC groups anounced the departure of the video forum some time ago. Seem most people these days use Youtube or Vimeo
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Old Feb 20, 2015, 11:28 PM
Neja is offline
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I'm late to this party but Im Interested... ive reviewed the plans for this camel and have found a design flaw... The dihedral break on the lower wing is not parallel to the thrust line. This break as is will add negative washout to the entire lower wing. this washout probably carries into the top wing also. still you were able to trim and fly this plane... Brilliant!

This build is of interest to me because I ant to build the Sopwith Snipe (WW10)
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Old Feb 21, 2015, 02:39 AM
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Valencia, CA
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Sorry I found the tissue discussion so late that this comment will probably post after that part of the build has been resolved. I recall seeing an article some time back where the translucency was addressed by rubbing the back side of the tissue with a white or light colored pastel, which both blocked the light and added to the main color of the piece. I believe the tissue was chalked before being tacked to the carrier sheet for printing..

A little variation in the backside color could also be used for weathering effects

Pete. G
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Old Feb 21, 2015, 07:05 AM
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Neja,
I lowered the leading edge of the bottom wing by adding slivers of wood to part L5 and A1 and reshaping until the ribs fit snug. The bottom wing is now parallel to the thrust line.

Pete,
I have heard of the chalking process but never tried it. Seems the tacky carrier sheet would take the chalk off when the tissue is removed, or the chalk would prevent the tissue from sticking?

A brief update on this model.
After many trim flights it now flies pretty good, but as Pete Rake mentioned, too much power will throw off trim efforts. I increased down thrust and have removed nose weight a bit at a time and it has tamed it considerably.
One note, this is the worst ground handling model I have and is nearly impossible to taxi. I just point it into the wind and go. Much like the full scale I would imagine.

I have the DPC reproduction kits of the Albatros DVa and Nieuport 28 in this series plus all the necessary equipment for them. Now all I need is some free time to build!
Glenn
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