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Old May 23, 2005, 06:25 PM
Look! Up in the sky!
eBird's Avatar
Grand Junction, Colorado
Joined Jul 2002
4,636 Posts
Mountain Models Magpie as AP plane: Part IV

Part III is HERE
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Old May 23, 2005, 10:00 PM
Nakelp
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United States, NJ, Union
Joined Sep 2004
6,776 Posts
I guess no one reads my posts ;-(
I said before the tip of the wing must have benn damaged on the ground :-(
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Old May 23, 2005, 10:06 PM
Nakelp
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United States, NJ, Union
Joined Sep 2004
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Few shoots from today.
LOVE MagAPie :-)))))))
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Old May 23, 2005, 10:21 PM
777
Bought at a price.
Winfield, Kansas, United States
Joined Jul 2002
1,570 Posts
Nice pics, nakel.

I didn't know that you were that close to NYC. What town is that?

I was stationed at Ft. Monmouth in Eatontown for several years. Then lived all around that area, Bradley Beach, Ocean Grove etc.

Had a lot of fun all around the Jersey shore.

Thanks for sharing,
Brad
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Old May 23, 2005, 11:27 PM
Nakelp
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United States, NJ, Union
Joined Sep 2004
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777
Im in Clifton,
the shots are from East Rutherford looking to the East and North.
I am way up North from Ft. M. and very close to the City.
Very often down the shore, my best buddies live there in the Red Bank area.
Man, I am in lack of words how to best describe Doug's little plane.
The MagAPie RULES :-)
Wish I could get closer to the city, but I am bit affraid. Have to look for suitable place
on certain days the skyline is so fantasticly lit by the sunsets, I have some transparencies ( in photo stock) but I wish I could do it from the MagApie too.
I flew today for about 20 min, slight breeze kind of overcast. So actually did a lot of just gliding on the wind.
came back home charged the battery and I used ONLY 785mAh from 2100 pack which was sitting for 3 days.
I can get about 45 + min on this pack. LOve this set up, but getting ready to make a new MagAPie soon just to make it cleaner ( no wires sticking out, and so on)
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Old May 24, 2005, 01:22 AM
No woman No cry
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Switzerland, Wallis
Joined Jun 2004
102 Posts
Servos

Nice, part IV! I hope this thread never ends !

Today I tried to install and hide the servo wires.
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Last edited by Fluidocs; May 24, 2005 at 01:53 AM.
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Old May 24, 2005, 01:23 AM
No woman No cry
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Switzerland, Wallis
Joined Jun 2004
102 Posts
Servos

covered with OraStick, no wires are visible
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Last edited by Fluidocs; May 24, 2005 at 01:53 AM.
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Old May 24, 2005, 01:27 AM
No woman No cry
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Switzerland, Wallis
Joined Jun 2004
102 Posts
linkage

I used 2mm carbon rods, CA and heat shrink sleeve. Very strong and linking free.
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Old May 24, 2005, 01:30 AM
No woman No cry
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Switzerland, Wallis
Joined Jun 2004
102 Posts
tailwheel

I installad a little tailwheel, just for optical reasons...it's a very little and lightweight wheel, reinforced at the inside with glased balsa.
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Old May 24, 2005, 01:35 AM
No woman No cry
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Switzerland, Wallis
Joined Jun 2004
102 Posts
LG attachement

I applyed a first layer of 120g carbon material, glued it with highly liquidly 90min epoxy. (god, I had 20min to refind the holes....!!!)

Edit: the weight of this carbon piece is not 120g, it's just the name of it...
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Old May 24, 2005, 01:40 AM
No woman No cry
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Switzerland, Wallis
Joined Jun 2004
102 Posts
than I attached the LG to the fuse and put the second layer of carbon over the lg. Glued it again with highly liquidly 90min epoxy.
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Old May 24, 2005, 01:42 AM
No woman No cry
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Switzerland, Wallis
Joined Jun 2004
102 Posts
and finally a little cover to hide this black carbon material, just optical reasons...
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Old May 24, 2005, 01:44 AM
No woman No cry
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Switzerland, Wallis
Joined Jun 2004
102 Posts
horizontal stabilizer

A little reinforcement of the horizontal stabilizer, I did the same with my SlowStick, works great and "looks cool" no need, but nice to have...
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Old May 24, 2005, 01:51 AM
No woman No cry
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Switzerland, Wallis
Joined Jun 2004
102 Posts
@nakelp86

do you use 2s or 3s, and what is your final weight?

@all

where do you put the battery?
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Old May 24, 2005, 09:29 AM
Mountain Models Wannabe
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Ithaca, NY USA
Joined Mar 2001
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Hey guys, I flew the modified wing last night. Lets start with some background. In performing some destructive tests, I observed that the normal failure was for the vertical spar to bend into a V or S shape under hard loads. this would then localize the stress to the plastic strap above the bend. In my case the wing just assumed a pretty significant dihedral but kept flying. I was fortunate in that the bend did not induce a twist which would have brought me down in a hurry!

What we did was to increase the thickness of the ply vertical spar to 1/16". I set the plane up with a Feigao 1308422S brushless with a 3S Polyquest pack. AUW was around 18 ounces. I gave it a brief test flight to make sure everything was trimmed. Winds were high but I was able to hover the plane briefly with that motor.

I next loaded the camera area down with old Nicad packs, bringing the weight up to 42 ounces. Oh yeah, I had asked Matthew to do a bad job making this wing, deliberately giving me dry areas under the spar. Before it was fully set up, Matthew was flexing the wing and managed to buckle the plastic spar where the vertical spar ended. I chose to not fix the spar.

I powered up and threw the plane hard. 42 ounces is a lot of weight! I was surprised how fast the plane climbed with so much weight. I then proceeded to execute a series of full power dives with hard pull outs, high G turns, etc. Where the vertical spar ended and the top spar had buckled the wing was flexing, giving the plane a nice polyhedral look, but I was unable to break the wing.

I will be switching to the 1/16" ply. The way I was flying that plane, and the way it was loaded, are outside what that design should be expected to tolerate. If anyone has an unbuilt wing and wants that spar, drop me an email. tjeatme, please email me your shipping address and I will send you another kit.

I want to add that I don't expect the wings with the original spar to fail. I am making this change to further improve the product.

Doug
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