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157" Discus Glider

Old 03-23-2008, 09:27 PM
  #401  
A10FLYR
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Default RE: 157" Discus Glider

Joe, wing joiner looks a little bendy....whuts yer thoughts??
Old 03-23-2008, 10:24 PM
  #402  
iflytailies
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Default RE: 157" Discus Glider

I replaced the steel rod with a carbon to save weight. Therefore, you see more flex. I use my Discus for thermaling and slow to moderate slope days. Works well for me...
Old 03-24-2008, 08:53 AM
  #403  
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Default RE: 157" Discus Glider

I see...
THX...
Old 03-24-2008, 09:43 AM
  #404  
KickAce
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Default RE: 157" Discus Glider

Hi Ernie,

I have not been able to put mine together as of yet... I know that working fulltime and going to night-school is no excuse... Just have been too busy this winter and I know spring flying season is just around the corner...

I will plan on flying/launching it with a hosemonster 4 meter hi-start... I also have the 3 and 2 meter hosemonster's as well so if the 4 meter won't quite do it i'll add one on the others in tandum to increase the power...
There are links in this forum a few pages back that has someone launching their's with a hosemonster hi-start... They also show a modification on the tow-hook which was moved off the bottom of the plane to two hooks, one on each side of the fuse under the wing so your launch is more stable on lunchand is how I will be setting mine up...

In looking at the sailplane and screw mounting the horizontal, stab that the mount for it came loose...[X(] The foam that it is attached to let loose from inside the fiber-glass vertical fin that it is attached to... Better to have that happen on the ground than in the air... Just be aware of this and others may want to check their's out...

Kevin
Old 03-24-2008, 09:56 AM
  #405  
iflytailies
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Default RE: 157" Discus Glider

I was posting the pics with the modified hooks on the side - see post #361. However, that was done with an ASW-26. The Discus should also launch fine with hi-start... Putting 2 hooks instead of 1 on the bottom is a good way of launching big boys such as the Discus...
Old 03-29-2008, 03:43 PM
  #406  
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Default RE: 157" Discus Glider

Maiden today. Breezy and cold but fun to see this thing fly. 60 degree climbs with the Axi 4120. Wings were flapping in the turbulence today but the glider seemed to handle it well. Man oh man those spoilers are really, really effective! I deployed them on approach for the first landing and had to use power to make it in to the field. Not an every day flyer for me but it should be fun to bring out from time to time! Well worth the $150 for the airframe.
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Old 03-29-2008, 04:57 PM
  #407  
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Default RE: 157" Discus Glider

Congrats Ryan on your maiden. Wings a flap'en means they were working hard for you. One of the best ARF's to fall off a slow boat from China for sure. And the epower does make it nice. Just wait for a pretty day. You'll really love it. Good luck
Blue Skys
Tp
Old 03-29-2008, 10:38 PM
  #408  
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Default RE: 157" Discus Glider


ORIGINAL: Flyfalcons

Maiden today. Breezy and cold but fun to see this thing fly. 60 degree climbs with the Axi 4120. Wings were flapping in the turbulence today but the glider seemed to handle it well. Man oh man those spoilers are really, really effective! I deployed them on approach for the first landing and had to use power to make it in to the field. Not an every day flyer for me but it should be fun to bring out from time to time! Well worth the $150 for the airframe.
I see on your pic that you have a retract. Did yours come with it or did you add it?
Old 03-29-2008, 11:23 PM
  #409  
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Default RE: 157" Discus Glider

I added it, I got the retract from www.icare-rc.com . The retract adds a little fun to the project.
Old 03-30-2008, 10:02 AM
  #410  
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Default RE: 157" Discus Glider

Congrats on the maiden. Also the retarcts..I am now installing a 1/5 scale retracts on mind. Can you share where you install yours? how many inches from the nose? yup the spoilers are extremely effective. I am using about half of maximum available even when I am caught high and fast. After all being said in this and other forums, I am begining to really like this plane. I have since decorated it and added a pilot. After the retarcts is installed, I will post another picture of it.

To all who are wondering if you should try this plane, well, I have no regrets getting it, as a matter of fact, if you want to try out 4m for the first time, I would recommend this, it is easy on the pocket, auw is lighter than most 4m and look a million dollars in the air. The only small complaints are, rudder design is flat at the bottom, tend to hit the ground during flare for landing ,canopy vac form is a little too thin and wing joiner is too soft, some heat hardening might help-heat it up to cherry glow then quench it immediately in water...havent tried though.

cheers
kevin
Old 03-30-2008, 10:25 AM
  #411  
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Default RE: 157" Discus Glider

The center of the wheel is directly below the leading edge of the wing, maybe a little in front of it.

I noticed the way the rudder was designed and modified it. I took the covering off, tapered the bottom so it wouldn't hit the ground, and also cut some lightening holes in it to reduce the nose weight needed to balance. In addition to the electric gear up front, I used 3 ounces of nose weight to balance the plane at about 77mm.
Old 03-31-2008, 04:53 AM
  #412  
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Default RE: 157" Discus Glider

what size prop did you use? was it enough power? what battery?
Old 03-31-2008, 08:23 AM
  #413  
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Default RE: 157" Discus Glider

I used a Graupner 14x9.5 prop, a Jeti 70amp speed control, and a FlightPower 6S 3300mah lipo. Definitely enough power for 60 degree climbouts! I don't know how many climbs per charge I get yet; I did two flights and got about 10-12 climbs on one charge but landed before the motor battery started feeling low.
Old 04-01-2008, 10:22 AM
  #414  
Steve Boone
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Default RE: 157" Discus Glider

I put the new wing rod in and now see why the other one was bent. It was done to "fix" the problem of the wing tube not being in straight. Anyone have a better solution? I'm afraid to try prying the supports loose from the inside of the fuse as it may crack the fuse. I thought about removing the o-rings and straightening the rod and epoxying it in place permanantly. This would get it real close if not dead on. After putting the new one in I couldn't believe how far off the tube was. I also wonder if they've gotten better at this and since solved the problem.
Old 04-01-2008, 11:21 AM
  #415  
Tom in Cincy
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Default RE: 157" Discus Glider

The glue might loosen by heating it up with a hair dryer or a monokote heat gun. I removed several of the formers for rework and eliminated the plywood piece that runs the length of the fuselage completely. Often they are just glued in with hot melt glue and a coating of resin over that.
Old 04-01-2008, 04:20 PM
  #416  
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Default RE: 157" Discus Glider

My wing tube is slightly off too. These planes do take a little extra work but for the price it's a fair trade. Definitely not a show quality plane but they are different and fun.
Old 04-01-2008, 05:31 PM
  #417  
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Default RE: 157" Discus Glider

I'm not really complaining too much as I only paid $20 for the plane minus the cost of the gear in it. I would just like to try to fix it as best I could. I'll try heating it with the kote gun and seeing if that gets it to release. I took some measurments and one side is off 5mm forward.
Old 04-07-2008, 11:35 AM
  #418  
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Default RE: 157" Discus Glider

Well, I finally got the opertunity to fly the maiden yesterday. nice 60 deg climbout. only problem is at full throttle it will do a loop if you let it. some mixing and down thrust will fix that. it also needs the rudder to turn effectivily. easy enough to program. I forgot to program the brake on the ESC so we had to put it down in the weeds to prevent the prop from breaking. no problem. good flier. rudder is very effective. looks great in the air. spoilers work surperb. no trim required.
Old 04-07-2008, 11:47 AM
  #419  
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Default RE: 157" Discus Glider

Congrats Stuffer on your maiden! I agree about the rudder needed for turning in addition to banking, though I was lucky in that my estimated downthrust on the firewall worked out pretty well. You might want to check your root ribs as one of mine pulled halfway off on the second flight. I tried pulling on the other wing and that rib seems tight.
Old 04-15-2008, 06:34 AM
  #420  
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Default RE: 157" Discus Glider

A little heat and the wing rod came right out. Re-drilled the wing rod hole and epoxied it back together. Now it''s straight. Installed twin tow hooks for winching. Just have to glass in the rudder tray/belly wheel pan, mount the tow hook for areo tow, some eye hooks to keep the wings on and do a little programming. Time to get in the shop and get busy.
Old 04-18-2008, 08:42 PM
  #421  
BobtheNuke
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Default RE: 157" Discus Glider

Hi, Guys

For those of you concerned about that carry through tube being crooked or the rubber grommets missing, here's a very easy solution...don't use the tube at all. Some of the better sailplanes have the hole for the wing joiner opened up to a diameter greater than the joiner and alignment pins near the trailing edge and leading edge of the wing. When the wing is lined up and "pinned" to the fuselage, the joiner floats and never touches the fuselage. The four pins are more than enough to support the fuse to the wings. Many full size glass ships are set up in a similar fashion. I owned an HP-18 (800 pounds empty) and the only thing that really held the fuse to the wings were four 5/16" stainless steel pins.

-bob
Old 04-23-2008, 08:12 PM
  #422  
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Default RE: 157" Discus Glider

What motor prop battery combo would you guys recommend for a nice climb out maybe 30 to 45 degrees, not 60 degrees?

Old 04-24-2008, 04:38 AM
  #423  
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Default RE: 157" Discus Glider

I'm using an outrunner from United hobbies. 50/55 600. A123 6 cell pack from Battlepacks.com and a hextronic 80 amp ESC. with all this in the nose, I still had to add weight to balance. but the climb out is 60 degrees +. the prop is a folding prop 14 x 9.5. I don't remember where I got the prop from though. it's carbon fiber.
Old 04-24-2008, 10:14 AM
  #424  
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Default RE: 157" Discus Glider

Is this the motor:

https://www.unitedhobbies.com/UNITED...idProduct=4907
Old 04-24-2008, 10:19 AM
  #425  
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Default RE: 157" Discus Glider

that's the one. I got 8500 RPM at peak charge.

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