Hey guys, thanks for your support at Toledo. Yes our Giles at OMP does fly with the YS 1.4 engine and has great performance. The only issue we had like disucussed many times was the landing gear mounting. The gear itself was fine, just the harwood mounting in the fuse. Admittedly it would be fine if you never plan on a hard landing in grass. Unfotunately this happens at times! We simply added some 1/8 a/c ply doublers at the top and bottom holes and that worked perfectly.
By the way we only have about 10 or so Ultra RC Giles left in stock. Check them at at www.ohiomodelplanes.com or give John a call at 937-372-0603.
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Mike (Salmon) Pilkenton, Chief Slab Designer Ohio Model Planes, Team OMP Captain
Posts: 351
Joined: 4/9/2004 From: Harsens Island,
MI, USA Status: offline
Don't miss the C.G. Correction! Post 412 from Ultra RC corrects the instruction manual and if you got a recent one like I did from OMP at Toledo this year. The CD says the cg is 190 mm. No way to balance there with a light motor. In post #412 Ultra RC States the correct CG is 200 to 250 mm! That is a huge difference! But by all means review post #412 in this thread no mater what your manual or CD instructions say. I believe you will find that many have found the prefer an even further aft cg but check the entire thread for those.
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Joined: 12/12/2005 From: Eugene,
OR, USA Status: offline
It's sad to see such a great line of aircraft discontinued. The Yaks seemed to not be very big sellers and not all that competitive in the weight department. The Katana looked great and was apparently very light like the Giles. I would like to see some more new planes built with similar designs in the airframe.
Posts: 68
Joined: 7/7/2002 From: Mississauga, ON, CANADA Status: offline
I bought one from Ultrarc about 2 years ago, finally pulled it out and started on it. Asked a friend of mine to do the hinges for me. elevators, rudder and one aileron were OK, but one of the ailerons the holes drilled were way out and the aileron was warped. After my friend did hinges, I brought it home and started to put the tail on, the elevators carbon tube and insert did not fit, it looked like the inserts in the elevators were not glued 100% straight, so I had to sand and sand to get everything to fit, however I am still having trouble to have it on straight. The canopy was dented and pushed in and cracked at the point of dent. ANyways, I have got the wings ready with the tabs glued in and servos are in, the elevator servos are in. Its going to be electric powered, I am going to wait and decide on the wing position at the last until after all is done and then decide on the wing position, I am leaning towards middle of the slot and lock it in. I have read that 1/2 inch from the front and some have it at the end of the slot, and they still fly great. So, unless I have no other option to get the CG right, I'll put it in the middle. I'll update weights and performance as I progress along.
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Joined: 4/9/2004 From: Harsens Island,
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747-RCU Don't decide on the wing position at all until the plane is 100% finished and assembled. Then put it on a balancer and move the wing to get the best balance position and then lock it in. You literally cannot decide it ahead of time unless you know for instance as I did that you have something at the wieght extreme and only then probably if you are at the really light weight powerplant like I was with a motor at 31 ounces with muffler. I pretty much guessed the wing would have to be all the way back and I was right. But the balance can changed just by what weight servo extensions you use. The ones going to the elevators are 3 footers. That is the beauty of the design. You don't have to guess and then add weight if your can't move stuff around to balance. You can put stuff where you want it, then balance the plane to your installation by moving the wing as it sits on the balancer. In my case I am at the back of the balance envelope and can adjust forward by changing props to different weights or changing spinners to move aft. That is how this thing is able to accomodate everything from a very light motor like mine to a heavy gasser and rarely (haven't heard of anyone) does anyone need to add ballast. That makes us all feel better.
Sorry to hear your issues with the tail. Man, mine came out dead nuts on. But I don't think I'm gonna trust the tail to tie the model down by for engine breaking. Gonna do that on a starting table at the club with the wings taking the load. Just not alot of solid structure at the back of the bird and a 20X8 prop can generate some ompf.
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Joined: 7/7/2002 From: Mississauga, ON, CANADA Status: offline
quote:
ORIGINAL: 747-RCU
I am going to wait and decide on the wing position at the last until after all is done and then decide on the wing position, I am leaning towards middle of the slot and lock it in. I have read that 1/2 inch from the front and some have it at the end of the slot, and they still fly great. So, unless I have no other option to get the CG right, I'll put it in the middle. I'll update weights and performance as I progress along.
That's exactly what I meant, you probably missed it. I was trying to get an idea from people who tried flying the planes at different wing positions and how the plane flew and where it flew the best. Chris says he found it flew best at 1/2 inch back from most forward, soomeone also said they flew right at the back and flies well. So, I am going to get it all ready except for the wing position and then lock it in place. I will still be able to play with CG as I am electrifying it and can move the batteries to play with CG.
You are right the tail is weak. Good thing yours was at least straight. That is nightmere trying to fix it. I am hoping to get it under 10lbs.
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MI, USA Status: offline
747-RCU
Ok, I see what you are saying now. The position you are looking for is really how far aft of the leading edge the balance point is that you are going to start from. One of the nice things is you can adjust it to some degree by moving the wing if you find you really need a change after you fly it awhile. I have found I like to be pretty close to aft CG limits on planes though not aft of them to start and then start changing balance as I trim and get a feel for the plane. Numbers in books are just that from what I've seen cg wise and in most planes they are very nose heavy for my liking. One of the nice things with most 3D type planes is they have a pretty broad range that they will fly in unlike some non 3D designs where they go from flyable to unflyable very quickly. My maiden will come probably mid week, weather being the variable.
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Joined: 7/7/2002 From: Mississauga, ON, CANADA Status: offline
I finally got mine ready, the plane had lots of problems, but hopefully it will fly fine. Here is the setup JR9411s on Elev and Ailerons, Hs6985 on rudder Plettenberg xtra25-13 with Jeti77 10S Lipo 3200mah polyquest 3200 30C,50C or FP3700mah Allup weight came to roughly 9lbs ready to fly, once the gear is glued in, I will do a final weght check on my digital fish scale. Here are a few pics. Maiden as soon as I can get out.
Posts: 25
Joined: 9/29/2007 From: Sully-sur-Loire, FRANCE Status: offline
Hi,
I own a Giles 202 of 76" span from a french RC specialist. I have some doubts about the CG location. You said the correct CG location for your Giles is at 190mm. What is the associated chord length ? (At the wing/fuselage interface).
Thanks, Paul
< Message edited by Paul_BB -- 7/22/2008 7:56:17 PM >
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Joined: 4/9/2004 From: Harsens Island,
MI, USA Status: offline
Paul
Yes, it measured aft from the leading edge intersection with the fuse. The airfoil is about 425mm leading to trailing edge at the fuse. The max thickness is 60 mm located about 140mm aft the leading edge. The comparisons may or may not help you. As has been mentioned in the thread, the wing position on this model is not fixed. It is able to move fore and aft. To balance this model you mount all your gear, then slide the wing for or aft until it balances in the range you are looking for on the wing and then you fix the wing position. That is why you see motors ranging from 32 0z to heavy 38 and even 40cc gas motors with pipes being able to be balanced without alot of shuffling components around or adding lead to get it to balance. I do not believe I have read any post of anyone having added lead to balance the plane no mater what the powerplant. Also this is a purpose designed 3D plane that also flies nice IMAC precision type patterns, but its design purpose in life is 3D flying so the cg may be further aft on the airfoil than a Giles designed with IMAC precision flying as the primary design purpose. Hope this help you some.
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Joined: 7/7/2002 From: Mississauga, ON, CANADA Status: offline
Maiden flight was successful. It was a bit windy and grey, hazy humid and I wasn;t feeling 100%, but couldn't resist any more. Anyways took it out, and had a very easy flight with it, it flies like on rails, plenty of power with the setup, I didn't have to adjust any trims at all. I am still a bit on the nose heavy side 9.5 inches, I just wanted to get the feel for the plane, so tried the F3A intermediate sequences and it did it really well. It had some wing rock in harrier flight, the knife edge flight was a breeze, no pulling towards the gear or canopy. This thing floats for ever on landings, it almost felt like it needs some down stick to settle on the ground. First flight no hard throttle or vertical pullups was 8 minutes, after I charged my batteries, I put back 1550 mahs, the batteries or the motor were not even warm. Second flight I pushed it a bit hard and tried some rolling circles and some hovering, I couldn't get it to lock into a hover for more than a few seconds, I think I need to go back on the CG a bit. Elevators are rock solid straight down with no issues and it bails out when given a slight amount of throttle. The gear survived both landings, I have put a 3/16 wood dowel in the legs. I like this plane and I think as soon as I find the perfect CG spot, It should serve me well. Thanks again to all who helped. HEre are a few pics I took today at the field. Oh BTW, after I was done putting the battery trays and all, the weight is around 9lbs and 5 ozs. The motor has great power, but since its designed for F3A, I canot swing more than a 18x12 prop, so I might try some other motor better suited for torque
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All Forums >> RC Airplanes >> 3D Flying! >> RE: Ultra R/C Giles 202 UL 29% 
RE: Ultr... - 
We simply added some 1/8 a/c ply doublers at the top and bottom holes and that worked perfectly. 
