4*120 Build Thread
#676
RE: 4*120 Build Thread
Deffinately need a flight report on this one. A G38 ought to haul this thing around pretty quickly. I am currently working on one with a few small mods. Typical clip one wing bay, 1.25 inch extended elevators and rudder and 1 inch top cap/counter balanced rudder. about a .25 inch extention to the ailerons. I too am working on relocating the elevator servos to the rear and using two. I plan on using an Evolution 26cc for power.
#677
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RE: 4*120 Build Thread
Well, the beast came to life today. I got one flight on her. The g38 runs great on the ground, but not so good in the air. So I have to wait for my gas guru to come out and help diagnose the problem. Anyway up and down in one piece. It seemed to fly good. More info after I get the engine running better.
Alan
Alan
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RE: 4*120 Build Thread
My OS 1.08 has been flying mine just fine for 8 yrs and over 300 flights. I've even used it for a glider tug and had more than enough power. Did I mention our field is at 8700' elevation?
#683
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RE: 4*120 Build Thread
I flew my first one with a YS 120 and a 16x6-10 prop and it was great. My new one has a DLE 30 on it. Even better!!!
Maybe you could tell us what you are thinking of using. I like your tag line too.
Maybe you could tell us what you are thinking of using. I like your tag line too.
#684
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RE: 4*120 Build Thread
I ordered a dls-20 but am thinking i may have made a mistake. Its supposed to have more hp than most 120 4stroke engines so Lord willing it'll do the job.
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RE: 4*120 Build Thread
Here is a pic of the changes I made. !st I reinforced the wing with some sheet balsa. It keeps the wing from twisting in flight. I also added counter balances to the tail feathers.
Alan
Alan
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RE: 4*120 Build Thread
I'll have to search for better pictures, but in the wing I cut some 1/8" balsa to fit diagonallly in the wing in front of the spar. That adds a lot of strength. The wing will not flex! I have heard of people over speeding the wing and it would twist. Not mine now. I also had some wood behind the wing at the fuse former that is located there. Just adds a little strength. I had the fuse on mine break in half there. I tried to put it back together, but it developed a twist, so I started with a new fuse. On my counter balances I used the thats about right theory.
Alan
Alan
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RE: 4*120 Build Thread
I had to share. I really enjoyed reading this thread, thanks to all that contributed. I build this one as per plans/instuctions with no mods except adding to rudder 1+1/2" at bottom. I was surprised when it weighed in at only 10 pounds. No lead added, battery under fuel tank tray, balanced at midpoint of range (4+1/8") from L.E. Waiting for snow to melt for maiden.
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RE: 4*120 Build Thread
Ive pretty much got the wing done except for sanding & servo mounts & aileron stuff. I made the landing gear mounts & the f1 engine mounts then shut the lights out for the night. Ill try to post a pic. It wont be very good & itll look lopsided but its just sttin there.
The wing isnt warped, i put sheeting where it didnt belong.
The wing isnt warped, i put sheeting where it didnt belong.
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RE: 4*120 Build Thread
Ive got everything pretty much done, i have went with the dle30, ive made a few mistakes but thank the Lord they were fixable. Im going with fabric covering. Cub yellow & white & maybee checkering. Ive re-enforced the landing gear mount, criss crossing in the wing, tri stock here & there, rounded wing tips, extended tail (not done yet but will do), i might not sheet my vertical or horizontal stabs, really no need. Plus it might help me not have to add weight in the nose. I am going to use flying wires & the ohio superstar products tailwheel kit. And im using the single prop kit for the dle30. Im only going to put a windshield on it, not the whole canopy. Im going to put all the switches in the cockpit with the pilot if i have room for him.
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RE: 4*120 Build Thread
Crashland, did you leave the firewall in it's stock location to mount the DLE 30? I know a HS that has a 120 kit, been thinking about picking it up, ESP so. E there will be no more from Sig
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RE: 4*120 Build Thread
Yes i left everything as is. It balanced out good so far. I still dont have it finished yet lol! Im down to cuting out the hing slots for my plastic pinned hinges. And then just putting everything together.