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Mystery glider

Old 11-08-2016, 02:35 AM
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Wildflyer
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Default Mystery glider

Does anyone recognize this glider?
Wing span is 149" steel rod joiners in fuse. Has small spoilers
weight without any gear 3.06 lbs.
Fuselage is fiberglass 49" long, sort of a wide oval at the cockpit.
Full flying stab has a 31 1/2" span

I figure even with a small (~200 watt) motor, and all other gear, it should be about 4 Lbs.

It cost me the huge sum of $20.00 at a recent swap meet.
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Old 11-08-2016, 02:58 AM
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Don Sims
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Do you think it's an old NE Sailplane glider?
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Old 11-08-2016, 02:58 AM
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firemanbill
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don't know what it is but... SCORE!

That is a pretty wing for sure!
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Old 11-08-2016, 06:20 AM
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solentlife
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That is NICE ! Pity no canopy though ... I see a very large plastic beer bottle needed !

Nigel
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Old 11-08-2016, 06:51 AM
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Yes no canopy, but I thought I would make a frame and just cover it with flat sheet for now. Maybe try a blow mold idea I have later.

It's about 12" front to back long. so it would take a big bottle.

The workmanship on the wing is outstanding, and I am hard to impress.
The spoiler linkage is unique, there is an open tube just behind the LE, about 2" down the tube is the inside tube of a nyrod, you just push on that, and the spoilers pop up, retract with a steel spring. so when you pull the wings off the fuselage, there are no linkages to unhook.
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Old 11-10-2016, 06:14 PM
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I found out it is a Soarcraft Magnum 12.
I put a picture on RCG and they recognized it very quickly.

Apparently some people like it and some don't, but that's true with almost every plane.
Listed flying weight by Soarcraft is 90 oz. I should be able to put in a motor and equipment without over loading. For $20.00, I can't lose, if it stays off the ground more than 60 seconds it will beat some of my glider flights.
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Old 11-10-2016, 07:06 PM
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Cool!
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Old 11-11-2016, 03:43 PM
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riverrat
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Originally Posted by Wildflyer View Post
Does anyone recognize this glider?
Wing span is 149" steel rod joiners in fuse. Has small spoilers
weight without any gear 3.06 lbs.
Fuselage is fiberglass 49" long, sort of a wide oval at the cockpit.
Full flying stab has a 31 1/2" span

I figure even with a small (~200 watt) motor, and all other gear, it should be about 4 Lbs.

It cost me the huge sum of $20.00 at a recent swap meet.
Wildflyer

I think the motor on a pylon in pusher configuration would
look COOL! (maybe detachable)

Regards
Jimmy
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Old 11-11-2016, 07:10 PM
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Wildflyer
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True that could look nice, but I was told this plane needs a lot of lead in the nose to balance. It was designed back when a 2.5oz receiver the size of a pack of cigarettes, was a small one. Servos were also around 2oz.

RCG guys advised me it would probably take a 400 watt motor in the nose to help balance.

They were not wrong, I have a relatively small Hyperion glider motor, it can put out more than 600 watts, taped to the nose, it won't even balance the fiberglass fuse without the elevator.

Making the spinner look nicely contoured to the oval nose will be interesting.
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Old 11-15-2018, 06:49 AM
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jimmbbo
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Originally Posted by Wildflyer View Post
I found out it is a Soarcraft Magnum 12.

Quite a steal.. back in the day, Soarcraft made fine kits.. remember saving my pennies to buy one of their Libelles and it was a dream...
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Old 11-15-2018, 06:50 PM
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Update


Maiden flight went fine, but the second flight not so much.
I got up to about 400' and was just circling around, must have hit a down draft as the plane started diving maybe at a 25-30 degree angle. With a full flying elevator I figured a touch of up would do it.
No response, so I added just a little more, still nothing after a few seconds, so a little bit more. The total up elevator was no where near full up.


Suddenly the plane shot the nose up and snapped the wing. It came straight down and wrapped the nose of the fuselage clear back over the wing mount when it hit.


Possibly I flew out of the sink and into a rising column of air, I don't really know why it did what it did.


Postmortem relieved the following;

Soarcraft used a short 6" tube for the wing rods, concentrates stress in a small area.
Original builder did not glue this area properly, the bottom spruce spar ripped loose and pulled out. It was a wreck looking for a place to land.


This was last summer, I haven't started repair yet. I figure I will have to revel the spar on both wings out at least 18" from the root, then rebuild carefully but not heavily. Wrapping the spars and tubes, at the root with a strong string like kite string at a 45degree angle should do it.
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Old 11-16-2018, 01:13 AM
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Dang Dave, that sounds like one rough crash. Hate that there was some shoddy assembly of your plane by the factory.
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Old 11-16-2018, 07:13 AM
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This wasn't an ARF, I got it at a swap meet.

The guy said he had to down size and a 12' glider is hard to fit in an apt.

Every thing looked like good construction. I checked all over it but couldn't see inside the area between the spars and the wing tube.
He just didn't glue the spar to the solid blocking on each side of the brass tube properly. The bottom spar sheared loose and the wing folded. I can fix it when I get in the zone.



I buy West Systems G-Flex 650 epoxy for high stress areas, it's expensive $32 for 8 oz but very strong, made for bonding to almost anything. Like the old 2 hour epoxy we used to use.
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