Sport Planes (Formerly I/C & Gas Conversion) Discuss I/C or Gas Conversions, Aerobatic Planes and Sport Aircraft

Ace GLH

Old 02-05-2014, 01:12 AM
  #26  
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Interesting. I've never seen a picture of an OFM.

I was working on a downthrust shim to try next time I go. I didn't give any full throttle on the straights because it was climbing too much. Basically I was running it about 1/3 throttle most of the time. Did full power on 2 turns. That was it. Anyway here it is:

Last edited by Dave180; 04-19-2014 at 03:33 AM.
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Old 02-06-2014, 10:40 PM
  #27  
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Looking at the CG again. Plans says 2 oz fuel tank so I simulated a full gas tank using 2oz weight. It moves the CG forward 1/2". Then I tried 1oz or 1/2 tank fuel and it moved it forward 1/4".

So CG location choices are:
Empty tank = CG
1/2 tank = +1/4"
Full tank = +1/2"

So now the question would be did the plane fly better with a full tank or almost empty? (for those who flew it with the gas engine.)
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Old 02-07-2014, 04:48 AM
  #28  
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I think I balanced mine as per plans, with an empty tank, as that is the usual way, for a nitro or gas plane.
If you balance with a full tank, you will have a tail heavy plane when you are trying to land, good luck with that.

Today with electric, we don't have the balance shift as before. So we can adjust it to our style.

The GLH was designed to be a racing plane, so the balance would have been a little nose heavy, as that gives you more stability. Today, I will probably go a little more tail heavy, for more control.

A great 3D plane will have the balance as far back as the pilot can handle, so he can do crazy maneuvers that require a neutral or even a slightly unstable plane that will not fly hands off.

I did mostly wide open high speed flight, huge loops, and screaming low passes (I had a safe place to do the low passes)
High speed roles were a kick, I had more aileron throw than advised, the plane looked like a baseball bat flying across the field, it was hard to see the wings and tail.

Try different balance points until you are happy. I have a friend that does VERY careful CG adjustments, and records his feelings about the flight in a little book. That is a very good thing to do.
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Old 02-11-2014, 11:38 PM
  #29  
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Still have problems with the launch. Crashed into a tree. Stripped the elevator servo. The plane is ok. Minor scuffs. So either I need right thrust or maybe less throttle on the launch? It just torques to the left. I don't know. It was my 3rd flight. First launch was ok though. Its fine if you get airborne. Actually it has torque rolled 4 out of 7 launches total.

Last edited by Dave180; 02-22-2014 at 04:02 PM.
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Old 02-12-2014, 02:19 AM
  #30  
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Before the crash, I did get some good level passes. I think it goes 100mph.

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Old 02-12-2014, 06:20 PM
  #31  
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Next time I'll try max throws on ailerons for launch.
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Old 02-12-2014, 07:08 PM
  #32  
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And for sure less throttle - it is all a balance. Hard to say from video what is up but if you had full right on after that launch with ZERO effect until you crashed in the tree - you for sure need more throw!

Mike
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Old 02-13-2014, 01:11 AM
  #33  
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Balance is a good word! I was just looking at my wing and it is heavier on the left side when balancing it on my fingers. 2 pennies on the right side levels it out. The checkerboard stripe on the left side is kind of heavy I'm guessing. I'll add lead to the right wingtip. Thanks.
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Old 02-14-2014, 03:45 PM
  #34  
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Ok, the lead weight is installed. I'm pretty sure this is the problem in combination with not enough throw on launch but I will be doing some ground tests to make sure my ailerons work at static loads and the esc is doing its job.

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Old 02-15-2014, 05:07 AM
  #35  
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Originally Posted by rcers View Post
And for sure less throttle - it is all a balance. Hard to say from video what is up but if you had full right on after that launch with ZERO effect until you crashed in the tree - you for sure need more throw!

Mike
I think I hit 2 trees actually. Clipped the first at 2.5 seconds after launch which put it on knife edge and then crashed at 3.9 seconds. It takes 2 seconds for me get my thumb back on the stick after throwing the plane. I probably flinched some. So I was really lucky the damage was minimal. It had a 1 inch crack in the fuse wing saddle, 2 small dents on the leading edges, battery shelf divider cracked, and 2 scuffs on the bottom fuse sheeting. I already fixed it all. Ordered some metal servo gears for the servo that stripped. The tail is really strong on the plane. Its balsa laminated with plywood on the bottom. So when branch hit the bottom plywood, the plywood laughed but the servo didn't.
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Old 02-18-2014, 03:37 AM
  #36  
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Originally Posted by Wildflyer View Post
I think I balanced mine as per plans, with an empty tank, as that is the usual way, for a nitro or gas plane.
If you balance with a full tank, you will have a tail heavy plane when you are trying to land, good luck with that.

Today with electric, we don't have the balance shift as before. So we can adjust it to our style.

The GLH was designed to be a racing plane, so the balance would have been a little nose heavy, as that gives you more stability. Today, I will probably go a little more tail heavy, for more control.

A great 3D plane will have the balance as far back as the pilot can handle, so he can do crazy maneuvers that require a neutral or even a slightly unstable plane that will not fly hands off.

I did mostly wide open high speed flight, huge loops, and screaming low passes (I had a safe place to do the low passes)
High speed roles were a kick, I had more aileron throw than advised, the plane looked like a baseball bat flying across the field, it was hard to see the wings and tail.

Try different balance points until you are happy. I have a friend that does VERY careful CG adjustments, and records his feelings about the flight in a little book. That is a very good thing to do.
Right now I'm at CG+1/8". I was a little behind the CG on the first couple flights when I thought I was at CG. My battery is about a far forward as I want to go. It seems to fly pretty stable at this location.

Last edited by Dave180; 04-19-2014 at 03:33 AM.
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Old 02-19-2014, 04:26 AM
  #37  
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I hope you war enjoying the plane. Mine is soaked up with castor oil, I don't think it has many flights left, one hard landing and I will have to tie the firewall on.

I have a kit in reserve, but I have too many other ideas to try.
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Old 02-19-2014, 05:38 AM
  #38  
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Oh well. I don't think there's too many people flying the GLH anymore. There's 3 gas and 3 electrics on youtube. I found a few threads where people build them but then they don't say much after the build. I see one kit on ebay for $70. The kit version is made to be pretty light. I wanted to pick my own wood plus beef it up to carry the battery and take some hard landings so I just got the plans. I changed the spars to 1/4" width and ran sheeting top and bottom. Plus shear webs added. 1/8" laminated tail instead of 3/32". Plywood doublers just about everywhere. Lots of people worried about the overall weight using the glow engines. Mines pretty heavy.
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Old 02-19-2014, 07:09 AM
  #39  
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Originally Posted by Wildflyer View Post
I hope you war enjoying the plane. Mine is soaked up with castor oil, I don't think it has many flights left, one hard landing and I will have to tie the firewall on.

I have a kit in reserve, but I have too many other ideas to try.
I know this is an electric forum but if you take K2R the spot remover and spray on your oil soaked plane it will remove the oil and help with the weight too. A little trick I picked up from back in my racing days.
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Old 02-19-2014, 10:32 PM
  #40  
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I remember using K2R back then, and it did work good.
But I haven't found it for a long time.
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Old 02-22-2014, 04:46 AM
  #41  
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Only 1 flight today. Had a bad landing. Came in too fast and it cart-wheeled when I tried to avoid a tree. Battery came out of the fuse.
Fixed it though.

Last edited by Dave180; 02-24-2014 at 07:34 AM.
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Old 02-26-2014, 12:42 AM
  #42  
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Flew it 4 times today. No damage. Yes!
It still torque rolls but I launch it around 1/2 throttle and throw it with a banked angle of around 30 degrees to the right. It ends up close to level by the time I'm back on the controls. Landings were better with 2 clicks back on the trim and just floating it in while applying throttle if needed.
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Old 02-26-2014, 03:57 AM
  #43  
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Last edited by Dave180; 11-16-2014 at 04:14 AM.
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Old 03-14-2014, 04:56 AM
  #44  
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Tried a different prop, 5.25x6.25. Only 35 amps instead of 39 with the 6x5.5. Slightly faster and less battery I think. It still torque rolls on launch, yaws left when going verticle (loops suck), and the nose drops when trying to roll. Right thrust shim being made now. It least it was a nice clear day.

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Old 03-14-2014, 05:05 AM
  #45  
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Originally Posted by Dave180 View Post
Tried a different prop, 5.25x6.25. Only 35 amps instead of 39 with the 6x5.5. Slightly faster and less battery I think. It still torque rolls on launch, yaws left when going verticle (loops suck), and the nose drops when trying to roll. Right thrust shim being made now. It least it was a nice clear day.

Todays speed runs:

https://www.youtube.com/watch?v=pq4KoH2taZw
Great Job It does GLH Take care and have fun, Chellie
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Old 03-14-2014, 05:48 AM
  #46  
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Thanks.
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Old 03-14-2014, 04:59 PM
  #47  
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Originally Posted by Dave180 View Post
Tried a different prop, 5.25x6.25. Only 35 amps instead of 39 with the 6x5.5.

Where do you get a 5.25x6.25 prop?
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Old 03-14-2014, 08:04 PM
  #48  
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Its from APC. Its like the highest pitch 5" prop they sell. Its towards the bottom of this list.

http://www.apcprop.com/pindex.asp?Page=2
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Old 03-14-2014, 08:24 PM
  #49  
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Latest Video on page 3.

Last edited by Dave180; 12-30-2015 at 11:09 PM.
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Old 12-08-2015, 08:44 AM
  #50  
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Flying the GLH again! Put a lipo on it but I didn't see a whole lot difference from the life battery other then weight. Around 27oz now. It's flying better after some alignment corrections. I was trying some different props out but I didn't get to try the noise maker after I bent the spinner collet on a bad landing. Next time.

Last edited by Dave180; 12-15-2015 at 03:04 AM.
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