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Dl50 dlg

Old 12-22-2015, 08:32 PM
  #1  
PappyJ
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Default Dl50 dlg

Afternoon!
I just acquired a Mountain models DL50 DLG and I am in the process of getting it airworthy. Anybody have any idea where the cg is supposed to be located? I am assuming 40% of the root cord as a starting point but I just guessing. I wonder if anybody my have the plans or know about this model?

Cheers!
Lyle
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Old 12-22-2015, 09:20 PM
  #2  
fhhuber
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Start at 30%, not 40%

Noseheavy requires added speed... tailheavy just crashes.
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Old 12-22-2015, 10:22 PM
  #3  
Rugar
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From the online manual:
Setting the Center of Gravity
The Center of Gravity (CG) will affect how the airplane recovers from a nose up or nose
down condition (pitch stability). With the CG too far forward, the plane will be quite stable,
but require a lot of up elevator to fly level. This will result in an increased low end speed. On
the other hand, too far back and the plane will be hard to control, requiring constant input
to keep the plane flying straight and level. The CG should be 2.75. behind the leading edge.
At this CG, the DL50 will be fairly neutral in pitch and will not correct itself in a dive. You
may wish to start with the CG slightly forward of this point till you get comfortable flying the
DL50.
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Old 12-23-2015, 07:09 PM
  #4  
Bub Steve
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2 3/4" back
I've built three of them so far,, Great DLG, feel every bump of air it flys though,, luv um
bubsteve
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Old 12-23-2015, 07:23 PM
  #5  
PappyJ
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Default Thanks a Lot!

Thank you for all your information & input FhHuber, Rugar & Steve Cooper! 2 3/4" Wow! The root chord is 6 1/4" and tip is 5" so I haven't figured out he mean chord yet but even at the full chord, 2 3/4" represents something like 44% if I've done the math correctly! Thats more than I would have guessed but I'll take you word for it!

If it stops raining and the fog lifts, I'm going giver a whirl! I let you know how make out!

Cheers!
Lyle
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Old 12-23-2015, 07:29 PM
  #6  
PappyJ
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Default Your DLG Experience?

Steve:
Its seems you have had a lot of experience with this model. What kind of heights have you been able to obtain? 100 ft? 30 to 60 min flight times? I've never thrown one of this dlg's before so I realize there will be a learning curve. The good thing is I will be able to take it up in the nearby city parks on the spur of the moment which hopefully will give me more much needed flight experience.

Cheers!
Lyle



Originally Posted by stevecooper View Post
2 3/4" back
I've built three of them so far,, Great DLG, feel every bump of air it flys though,, luv um
bubsteve
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Old 12-23-2015, 09:23 PM
  #7  
Bub Steve
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90-100' flings, I can get over a Min in dead air easy,, thermals very well, but learning to thermal takes time :-)
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Old 01-07-2016, 04:51 PM
  #8  
PappyJ
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Default Air Time!

I finally was able to get the little DL50 into the air the last two days. It's been cold, around 0C and the ground is just about frozen. My technique just sucks but practice makes perfect as the saying goes! I'm having a lot of problems with the wing connections as they are pretty well stripped. Going to have to figure out a better way to mount the wings. Other than that, it was a blast to fly! I especially like being able fly it in our nearby park at a moments notice.

Cheers!
Lyle
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Old 01-08-2016, 12:40 AM
  #9  
Bub Steve
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Originally Posted by PappyJ View Post
I finally was able to get the little DL50 into the air the last two days. It's been cold, around 0C and the ground is just about frozen. My technique just sucks but practice makes perfect as the saying goes! I'm having a lot of problems with the wing connections as they are pretty well stripped. Going to have to figure out a better way to mount the wings. Other than that, it was a blast to fly! I especially like being able fly it in our nearby park at a moments notice.

Cheers!
Lyle
use some strips of the fuse cloth epoxy (try to keep it light,) along to wing and fuse,, 1-11/4" wide 5 1/2" long tack the wing on, if you have to get at anything under it later just razar knife the seam and redo it, Did this to my last one and it worked like a charm, I've retapped the wing screw holes but this works better and is rock soild
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Old 01-09-2016, 03:10 PM
  #10  
PappyJ
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Default Thank You!

Interesting option Steve.....thanks for the input. After staring at model I came up with another solution.....I don't know if it will work but I'm going to giver a go! I drilled a small hole on the underside and fed a 8x32 screw from the top through the wind & body then put a nut on from underneath. I then cut the screw off and ground down the thickness of the nut. It shouldn't move now.....but I realize the wing will probably break If I pound her in too hard. I'll let you know how it works.

Cheers!
Lyle

Last edited by PappyJ; 01-10-2016 at 11:55 PM.
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