ChopperMike

I just picked up a kit at a swap meet but I just realized there is no instruction manual. It included the plan so I don't see a serious problem but I want to make sure I don't mess something up. One thing I know I'll need help on is the dihedral, nothing shown on the plan. Anything esle I need to watch out for?




Mike

Schu

My Feedback: (5)

Mike,
I will look around and see if I still have a manual ( I have built a couple ) and let you know.
There used to be a guy on here w/ a name of 1/2A SST - he should have one for sure.
Dale

ChopperMike

Hey, thanks a lot. I went through all the die cut parts and came across a few that I have no idea where they go. I'm sure I can build it off the plans but I want to make sure everything is correct, especially the dihedral.



Mike

Andrew

3/16" each tip.

ChopperMike

Thanks. From pictures I've seen I would have guessed more.

I'm not sure SST is around anymore. I checked out his profile and he hasn't posted anything for a year and a half.



Mike

Andrew

It's pretty flat - the measuraments came from the RCM plan set.

Here are a couple of pics - one is from RCM file pics and the gray one was owned by the late Lynn Sipes.

andrew

combatpigg

My Feedback: (3)

I think dihedral on a high winger is a waste of time and effort. It contributes nothing except a tendency for the plane to roll like a drunken sailor on payday night.

If anything, throw in some anahedral.

ChopperMike

High wing airplanes certainly don't usually have much dihedral. If you look at a full scale J3 they're almost flat as opposed to something like a Warrior that has gobs of dihedral. I'll put in the 3/16" per tip, I seriously doubt 3/16" will make much of a difference either way. I still would like a manual if someone has one. I'm sure I can build off the plans but a manual would insure I don't miss something that will make the build more difficult than it needs to be.


Thanks in advance



Mike

rv7driver

My Feedback: (105)

I got a NIB 1/2 SST, I'm out of town right now. I'll make a copy of the manual for you when I get back should be home in 3 days. PM me you email address and I'll send you a copy. 67stang is right don't put any dihedral in the wing it flies so much better. Pete

ChopperMike

Thanks a lot, I really appreciate it. And I'll take your advice and leave the wing flat.



Mike

rv7driver

My Feedback: (105)

Make that combatpigg not 67stang, don't ask I don't know, take his advice mike. Cheers Pete

got your PM

rv7driver

My Feedback: (105)

Mike, SST manual sent. Pete

rcdude-K

I have this plane als. The wing seperated on me so maybe I will repair it and make it flat. What about adding a rudder, any advantages on doing that to this plane? also has anyone converted to electric/brushless. Any ideas on the motor/prop/speed control setup.

ChopperMike

Actually that's what I ended up with on mine. I flew it a few times with a TD .049 and wasn't happy with the performance or the hassles of getting the engine running right. I used a Himaxx HC2812-1080 with a 8-4 prop and 3S 1320 mah or 2100 mah pack. I have to get a folding prop on it though, I'm breaking props on landing quite often. It flies very well with this setup though and has almost twice the power of the TD.




Mike

rcdude-K

What about adding landing gear.
I would imagine you could make it a tail dragger with a fixed skid on the rear. Especially if all you are doing is trying to land.

What about a rudder did you do that or is it really not needed?

rcdude-K

Also, How did you attach the motor? is that Himax an inrunner or outrunner motor. was there any need to pitch the motor down and to the side or is it mounted inline along the thrust line of the plane? Include some pics if you have any.

ChopperMike

Here is how I mounted the motor:

I could add LG easily and that's probably what I'll do. It'll add a little weight and drag but it's probably the best option. This airplane doesn't need a rudder to turn but w/o rudder control landing will mean have to go fetch it.

rcdude-K

Cool looks good. It looks like the out put shaft is not going to clear the front of the fuse though. Was this a motor you had lying around or did you select it specifically for this plane. What about the thrust line though. do you have to account for that?

ChopperMike

It doesn't have to. Remember, there has to be a prop adapter added to it.

This motor was one I had lying around. Had it for years. Thrust line is 0-0.




Mike

digs142

Just found this thread.  I have this kit - next in line. 
I just have the plans, so if someone has a manual, please send it along.

couple of thoughts/questions before I build:
1.  planning to power it w/ a 450 Eflite motor.  I have a NIB teedee, but I'm really enjoying the electric power these days.
2.  anyone tried two micro servos in the wings rather than a single central servo?
3.  elevator servo - will a micro do?  what sort of torque should I be figuring on here?
4.  I'm used to foam, or balsa and tissue, so this will be my first iron on covering - thinking of solarfilm?  Thoughts?
5.  I liked the comment about no rudder = go fetch.  Hadn't thought about that - makes sense.  Should be easy to add a rudder to this one.
6.  this is a NIB kit.  any suggestions on gluing old wood?  Cya or wood glue?
7.  has anyone converted this to electric and have any suggestions on power, mounting, and cooling,etc.  I was figuring a 1200 to 1600 3S, 20 Amp to 25 Amp ESC, and an EP 8040 prop w/ a prop saver.
8.  Radio will be a DX5 w/ a spektrum AR6000 or a Futaba 72MHz dual conversion.

Next plane after - or sometime down the line - is an Ace Pacer.  I hope to learn a lot on the SST as the pacer was a gift from my late father about 29 years ago - and not built yet!

Comments and wisdom would be appreciated.

buzzard bait

I used a single micro servo (HS-81) to drive the ailerons on my Goldberg Skylark via torque rods. It was powered by .25 and was quite fast on that engine. With a single central servo the whole works are neatly inside the fuse instead of holes in the wing with servos sticking out. What would be the advantage of dual aileron servos on a plane this size?

MikeSell

My Feedback: (2)

I have a couple of 1/2a, a couple of .09 ARFs, a .20 size, a .40 size and an 82" span giant SST. A friend really loved this design and pushed me to fly all of his to trim them out. I fell prey to their ease of build and programmed them into realflight before building each. Dihedral was important to their original purpose, Super Sport TRAINER, but unnecessary for a second or sport plane. If you expect coordinated turns or landing in a cross wind a rudder is important. If you fly like most R/C only pilots you may wonder why they ever put one on a plane. GREAT LITTLE PLANE, LOTS OF FUN, SIMPLE TO BUILD

aa180335

1/2A SST angle of attack is 0 degrees, the air foil is full symmetrical. Flies like a guided dart!

Andrew

Thrust, wing and stab AOA are set to 0-0-0, but the airfoil is similar to the NACA 2415, which is semi-symmetrical.

aa180335

It's been almost 40 years sense I built it and it's so close to full smymmetrival it flies like it. Thanks for the reply, it was a fun little plane to fly.
There is one on eBay right now listed as Hobby Shack 1/2A SST.