jlchapman

My Feedback: (5)

I have a 90/120 sportster I built in 95 with a YS120. The plane still flies today. Used two servos for the elevators and two servos for the ailerons. I've been running Futaba 148 everywhere until I had one fail on the ailerons. Changed the ailerons to Hitec 605 and have never had a problem since. Used the stock wood beam mounts and no problems there. The balance was right on the money with the YS120. I also have another 90/120 in the bones almost ready to cover.


Jerry

Newmanator

Hi,

I recently bought a used Super Sportster with a Tigre .91 glow. The MonoKote is damaged as you can see in the pictures, and it came with Futuba servos, receiver, and transmitter that is "Gold Stickered". 100.00 not bad huh!?

I am in the process of recovering the airframe with chrome Monokote as I thought it was a warbird before I was able to find out model info. (yes I am new to Gas ) I think it will look pretty slick.

I was hoping someone on here would be able to help me find a tuned pipe and help Identify the Hi/low needle adjustments on this motor.

This kit appears to be from the early 90's as well as the Tigre .91.

Any help would be greatly appreciated!

Mike

johnp793

My Feedback: (30)

Friends- I've just been given a Super Sportster 120, obviously made from a kit. It appears to have some triangle stock strengthening the joint between the stab and the fuselage, but the absence of external weights suggests that the elevator balancing issue wasn't addressed. It is set up for dual servos for the elevator, though only a single servo for the ailerons!

Is the triangle stock I'm seeing the recommended upgrade to the stab/ fuselage joint?

Under what circumstances does the elevator flutter appear? I'm not an aggressive flier, though will have an Enya 120 or an OS 1.08 as a power plant in this plane. If I do a good job on sealing the hinge gap, how worried should I be about the flutter problem?

Should I install dual servos on the ailerons- one per wing half?

John

RoyR

I have had two kits. My first, someone told me I would have trouble with the landing gear. Sure enough after a few months, on what looked like a normal landing, the gear collapsed, breaking a rib. I repared it, and put an aluminum gear on the fuselage. I did this by adding a hardwood support inside the fuse in front of the wing, and had no other problems. I did cream it in later. Broke the wing and messed it up beyond repair, the gear stripped the nylon bolts holding it on, but the fuse in that area was in good shape.
I bought a kit just before they stopped making them and for some reason stopped flying RC until this year. I just completed the kit and have three flights on it at this time. I built it with the gear on the fuse. By the way, I took the gear from the other Sportster, cleaned off the paint and polished it and have it on this kit.
I also put the servos in the wing on each aileron, and have dual elevator servos. I use standard servos and have no problems.
You will enjoy this kit, it is a lot of fun, both building and flying.

RoyR

Oh Yeah, It is powered by a YS 120. This is the one I had on my first Sportster, it still runs and sounds great. Plenty of power, in fact I normally run about half throttle until I want to climb straight up or scream across the field.

John45

I am building a Super Sportster 90 / 120 and cannot decide on the best engine to use, I have a MDS68 SC91FS ringed and Saito 180 people have said the Saito can drink a lot of fuel but can enyone say how much at say 1/2 and 3/4 throttle openings also it is larger than the recommended engine.

Capt. Bill

I am finally getting a Super Sportster 90/120 kit I built had in the late 1980s finished. I have a nre but never run OS FS-120 that I built the plane around. I noticed when I put either Master Airscrew 15-8 or a Top Flite 15-8 wood prop on with a Tru-Turn spinner back plate there is not enough thread for the lock nut/adapter. Any suggestions on prop and size that would have a narrower hub and would be good for this plane/engine combo. I don't fly contests, just for fun. And all my maneveurs have the the same name "Did YOU do that?"

donkey doctor

Hello; I have a 120 super sporstster fuse, but no wing. I bought a garage load of planes and equipment awhile ago, and the fuse was among it all. I have the plans for the kit, which shows a double tapered wing. I noticed all the sportsters have a plank wing.

I thought I'd build a double tapered wing for the fuselage, maybe using my GB suhkoi plans, since the chord at the fuse is the same. I don't like the landing gear arrangement on the sportster, I fly at a grass field and don't want to wreck a wing on a rough landing, so I'd use an aluminum gear mounted just in front of the wing.

What do you guys think?

xp-39

I started this kit back in 84 and never finished it due to time and finacial constraints (Marriage, kids) Recently got back into the hobby about two years ago. I really wanted to do something different with this plane. There are so many new choices today as far as finishing options, engine selection. This is a gasser I selected a G-26 for an engine, changed the front end to fit it in and went with the round cowl. Sheeted and glassed the entire plane. Covering is Flite-Metal, unbelievably realistic but takes forever to apply. did not like the wing gear arrangement hence the aluminum gear. Paint scheme will be of a Northrop Gamma Texaco Sky Chief. This kit is great for kit bashing, I plan on building another.

zbo2

xp-39
looks good.........did you check the CG on it yet.....i was given one and just took all the covering off. who ever built it did a really nice job. i was going to put a OS FT120 glow twin in it but am seriously thinking about the G-26. i want to make the move to gas and this may be my first. when i put the OS 120 twin and all the related components in the plane it was really tail heavy. so i'm thinking i might have to extend the nose to get a little more "arm" so i don't have to add weight. do you recall what the all up weight on the G-26 is? and if you've checked the Cg did you have to add any weight? thanks

xp-39

I have not checked the CG yet, I am still applying the Flite-Metal to the top of the wing. I expect it to be a little nose heavy, in order to round out the front fuselage I blocked it with lightweight chunks of balsa and shaped it. That combined with the round cowl should have added a little extra onto the nose. If so I plan on placing a 1500MAH battery pack in the tail to even it out. I will put it together tomorrow and do a weight an ballance on my CG machine and let you know how it comes out.

xp-39

Question. If RCM is selling the plans for the SS120 do you think Kit Cutters can cut a kit for me? Hmmm if so I bet they could scale it up to 110" wing span.

zbo2

possibly.........i guess it wouldn't hurt to give them a call or an e-mail........the giant scale arf has a 82" wingspan.........110 is gonna be pretty big. let me know on the CG it looks like the weight of the OS twin is close to the G-26.... so you might be a little tail heavy still.

xp-39

Ok, Checked the CG. Manual suggests 3-7/8 to 4" behind the leading edge. Amazingly I had to place the battery pack just in front of the landing gear for perfect balance. I set the guages for 4". You have a plus or minus 1/2" on this CG point. This really blew me away so I looked up the weights on the "Suggested Engines"
OS .91 2-stroke .912CU 15.0CC WT19.3OZ
OS 120 FS Surpass 1.2CU 19.7CC WT35.3OZ
OS FT 160 WT38.8OZ
Zenoah G-26 1.5CI 25.4CC WT with muffler 55OZ With stock muffler 59OZ

WT of complete plane 11lb. Nothing in the manual on a suggested wt range.

zbo2

i kinda thought with the way the Cg was on mine...and the OS FT120 is up around 55oz.....that you were going to be close to perfect. i needed more front weight to balance. it looks like you have the rudder and elevator servos in the stock location? i was going to put mine in the rear, like the larger scale planes.....now i'm not sure. do you have the EI g-26 or does yours have the mag.....

xp-39

Servo's are in the stock location. I wanted them hidden from view, servos mounted in the tail are fine for high performance planes, I did not want to ruin the lines of this build. The 26 is the older version with the Mag.

koenig427

I'm working on a SS 90/120 and i was wondering if anyone is using a .75 sized engine? I was looking at the GMS.

Capt. Bill

I assume you mean a .75 2 stroke. I fly mine with an OS 120 4 stroke. It would probably fly but I think you would be disappointed with it.

koenig427

Yeah i was talking about the GMS .76 or something like that. I didnt wanna go with the 4stroke since i have other plane with them and wanted something different.

XTOL

You would be disappointed. One of our club members had one running
a Supertiger G90. While it flew well it was definitely underpowered.
I would forget the 90 and consider this a 120 size plane.

koenig427

So would the GMS 120 be to much power?

ckangaroo70

My Feedback: (51)

Now your cooking! A 90 2 stroke will pull these around, but as XTOl said...it definately is not overly powered with a 90 2 stroke. So while a 76 GMS might be able to get it in the air...it would really be lacking as a Sport Plane with a GMS 76. The 1.20 2 stroke would be the ticket IMO. I have built 2 of these from kit, and am currently building one from scratch to install a Ryobi 31 gasser in it. Go with no less than a 90 2 stroke and preferably with the 120 2 or 4 stroke and you will really enjoy the Plane. In my opinion this Plane leans more towards being a 120 size Plane then it does a 90 size.

Also make sure you use guide wires on the tail and seal the hinge gap. Big Super SPortsters are notorious for shedding tail feathers if they are not braced good and all methods used to prevent elevator flutter. Great Planes added an amendment to that kit explaining how to static balance the elevator as well which is supposed to help with possible flutter. The 2 I built..I never experienced any flutter or failures, but I took all precautions and followed proven methods in my build to prevent it. The two covered ones I built from kit, and the one in the bones is the one I am currently scratch building.

zbo2

i kinda put mine on the back burner for some other projects, however i did pick up a brillelli 36 cc gasser before he went under...just before....so when i get back in gear i'm gonna put that in there.

koenig427

Well i finished my supersporter with a satio 120. Ive flown a trainer and cub for years and then a plane kinda like a profile but not really, that was just put in the ground due to high speed flutter. and now im on a towerhobbies kaos and ive been flying that fine. Should i be worried that this supersportster is too much for me to take up on my own for the first time? Or does it float alot. I dont really know what to expect with this plane ive never flown anything like this

xp-39

I think you should be fine. One thing to keep in mind, the bigger the plane, the less tendency they have at being pushed around in the air. If you can fly the Kaos without trouble, the SS120 will be a piece of cake. I used standard servo's in mine and had no trouble with flutter. The control surfaces on the SS120 are not overly large.

Good Luck!