Eagle 63 (oz6804)
About this Plan
Eagle 63. Radio control sport/trainer. Wingspan 62 in, wing area 715 sq in. For .29 to .49 engines.
Eagle 63 by Carl Goldberg, RCM plan #858, February 1982.
Quote: "The growth and diversity of modeling is a never-ending, fascinating phenomenon. At first, practically all models were rubber powered free flights, and simple in structure. Then came control line which was an instant success and, much later, radio control. Improving the first crude radio equipment turned out to be a much more difficult situation, and many years passed before the technology advanced to the point where it could become a popular sport. Nowadays, a modeler can go all the way from tiny peanut models to giant scale jobs, from racing ships to sailplanes, and from sport ships to precision pattern models.
Along with this, so many people have been getting into modeling without a long apprenticeship, that there has been a real demand for simplification and prefabrication. The Eagle is intended to meet these criteria. Essentially, it's a conventional looking ship, with see-through cabin for appearance, extremely simple construction, and toughness created by considerable use of plywood and hardwood.
In spite of using these materials, the ship is surprisingly light, less than most balsa models of the same size. The lightness, combined with the high lift flat-bottom wing section, makes the ship capable of the slow flight a beginner needs to go along with his slow untrained reflexes. The Eagle has no trouble maintaining altitude at well under half throttle on a K & B .40, yet it can really go when the engine is opened up. It has been flown very successfully on an O.S. Max .20, as well as having been wrung out with a real good late model K & B .61 (we were trying to break the wing with dives and sharp pull-ups). The HB 40 PDF has also given excellent results.
Overall, besides being an easy to fly trainer, the Eagle makes a very good sport ship - quick to build, tough enough to stand up to the rigors of lots of flying, and very maneuvorable. It has been flown with three different dihedrals - low dihedral for the advanced sport flier, medium dihedral for the average modeler, and high dihedral for three channel equipment. Low dihedral, of course, is best for inverted flight and certain maneuvers such as stall turns. Most people undoubtedly will fly it with four channels, but it does fine as a three channel bird, too. The equipment we've used has been Futaba and Kraft, and the final model has Airtronics' equipment. All of it has done well. Most of the flying has been done with the K & B .40 and an 8 ounce Sullivan tank. It takes a 10 ounce tank easily and even a 12 ounce tank with very little difficulty. An outstanding feature has been that it's not particularly sensitive to the CG location. We moved the CG back and forth, and anywhere near balancing on the main spar works out well..."
Update 27/08/2016: Replaced this plan with a clearer copy that also now includes previously missing 2nd sheet of formers, thanks to Circlip.
Udate 19/11/2018: Added missing page (p29) to article, thanks to anon.
Update 12/07/2019: Added review from RCM Feb 1983, thanks to rocketpilot.
Update 28/09/2019: Added review from Flying Models, January 1985, thanks to RFJ.
Supplementary file notes
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-
(oz6804)
Eagle 63
by Carl Goldberg
from RCMplans (ref:858)
January 1982
62in span
IC R/C Cabin
clean :)
all formers complete :)
got article :) -
Found online 29/06/2015 at:
http://www.rcgroups.com/forums/showpost.php?p=31991586...
Filesize: 916KB
Format: • PDFbitmap
Credit*: RFJ, bullseye000, Circlip
Downloads: 6342
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User comments
Hi, page 29 seems to be missing from the article PDF.anon - 19/11/2018
Got it, thanks. Fixed now.
SteveWMD - 19/11/2018
Can you give me a wing segment since I am going to build from scratch. This part was already built when I purchased from friend.
Terry Nolt - 24/09/2022
Hi Mary, herewith a small picture [pic 007] and big comment(!) for Oz 6804. Well I got carried away didn't I....
I built my Eagle from a kit my friend gave me with the wing already framed up, that was in 1999. I used a new K&B 40 for power. That wing had 5/8" hardwood spars and that is an overkill (imho), and very heavy - I now know that was NOT part of the kit. Balsa spars would be just fine imho. Anyway the plane flew fine despite that AND the heavy covering I used. However the repaired/refurbished version in the picture flew even better and almost like a much lighter plane. It looks like a full size plane when flying! It is very steady in the air, stately, and easy to control - even in gusty winds! (Maybe heavy wings are a good thing?...)
The ailerons provide precise control, just right for this plane, don't be put off installing them. My Eagle had a bad crash in 2007 (a bad cell in the Rx battery pack; a full charge on three cells still seems like alls well...!!). I put the bits away until January 2023 (!!!!) determined to make a Phoenix of it, despite the heavy wing. I used lighter monokote on the wings and tail, and decided to use my Magnum 52 4-stroke. I didn't need the noseweight that the K&B40 required. The repaired eagle came out only a bit lighter - but it flew even better!! I reckon this is a nicer design than the Eagle 2 (oz12633) which has less character (imho).
One point I would like to make; if building this I would recommend either being certain that your tailplane does not flex at all, or add 1/16" sheeting to the top side as I did on the repaired version. My original was sometimes twitchy on elevator, because the tailplane was not very rigid at all; not so my repaired version. Btw., my grandaughter designed the eagle on the fin because I couldn't find the original plan motif at the time; jolly good it is too! (imho).
Cheers, Jim.
PS I would weigh the plane as someone is sure to ask, but my scales only go up to 5lbs!
Jim Primrose - 06/09/2023
Some photos of the Eagle 63 [main pic, 009]. I have carried out a complete reconstruction of the fuselage on this model, as the original suffered damage over time when coming into contact with oil and fuel. However, the wings and stabilizers, both horizontal and vertical, belong to the original kit by Carl Goldberg, dating back 30 years. The model continues to remain in excellent condition during flights.
Initially, I installed an OS40LA engine, but had to replace it with an OS46 FX engine because the altitude of my location in Bogotá, Colombia, at 2,600 meters above sea level, required more power." Thanks,
Danilo A Garcia-Hansen - 10/10/2023
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- Eagle 63 (oz6804)
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- Supplement Filesize: 2193KB Filename: Eagle_63_RCM-858_oz6804_article_.pdf
- Supplement Filesize: 734KB Filename: Eagle_63_RCM-858_oz6804_previous.pdf
- Supplement Filesize: 1843KB Filename: Eagle_63_RCM-858_oz6804_review_FM.pdf
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