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HomeAircraftHelicopterHelicopter Main Discussion › OS50 and the Sceadu; should he get it?
07-16-2002 01:41 PM  16 years agoPost 1
jbrundt

rrVeteran

St. Charles, MO

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I have a friend that wants to get into helis. He really likes the Sceadu 50 and wants to get it along with the OS50. My Sceadu has the OS46 in it and it runs great. He's seen that fly and was impressed. What has me concerend is all the talk I see on the forums here about the OS50 in the Sceadu needing constant adjustment and causing vibrations in the heli.

What is the concensus here about the OS50? Is it a good engine or not for a beginner? The guy is going to have enough on his plate learning to fly and the last thing I want for him is to have to mess with the needle valve all the time. Granted I'll be helping him but I don't want to spend atime constantly fiddling with the needle settings as well.

And for those of you saying that he needs to get a Hatori or other muffler/pipe that's not an option. One of the reason's he's getting the Sceadu is that it comes with a muffler and he doesn't want the added expense (which by rights he shouldn't have to make right now).

So let's hear what you think......

Jeff

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07-16-2002 02:43 PM  16 years agoPost 2
vetrider

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Daleville, AL (Ft.Rucker)

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46 or 50
Won't matter a lot unless he's a real hard 3D'er. For sport flying it'll be just fine with a 46. I heard the new OS 46's are better to tune than they use to be.
I have never used the stock muffler on my OS50 so I can't help there, but my 50 is better in flight with the weston 50 pipe than the 50 size hatori. It acts like a governor in keeping RPM more constant.

Nolan

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07-16-2002 03:40 PM  16 years agoPost 3
fitenfyr

rrProfessor

Port Orchard, Washington

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OS 50 "problems"
Most of the problems posted here about the 50 are tuning. Each engine tunes different and has their individual quirks.
The 50 needs a big muffler. If you don't have that it will not run well. It will run, but tuning is a B#$%& IMO.
The engines have had SOME defects, but most have been easily resolved and have been pretty few.

As for a beginner bird. The 50 is great. You can run it real rich and still have gobs of power on demand for those dumb thumb beginner moves.
But if he doesn't want to get a bigger muffler then I wouldn't mess with it for now. Get a Raptor and OS32. The stock one just doesn't cut it IMO, and yes you will be tweaking the needle a lot with the stock muffler.

You can pick up a HHI Hatori knock off pretty cheap. Check here
http://www.ewtech.com/cgi-bin/miva?...flers+and+Pipes

That is the one I use and works great. Can't beat 50.00 and the quality is very good.

Jason Stiffey
Fly Fast....Live Slow...

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07-16-2002 04:07 PM  16 years agoPost 4
Maxx

rrKey Veteran

Shreveport Louisana

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I have 3 new flyers in Shreveport, none of which has any heli experience what-so-ever!. All three had their Scoobies assembled and rough set-up without my help. To me, that says a lot about the quality of the kit, considering the instructions are in "modified" Engrish! Two of these birds have the OS .32SX and one has the .50...all fly and run great! Carl did build a fan shroud for his .50 Scoobie just to be on the safe side and, as stated above, a .60 sized muffler is mandatory for best proformance! The helis are well built and the aftermarket is gearing up to produce lots of upgrades ( "shiney bits" as our British friends say

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07-16-2002 07:40 PM  16 years agoPost 5
coptereddie

rrApprentice

Maryland

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Jason:

Just ordered one of those mufflers. They said the 46 sized one works best and is a perfect fit (the 60 one is about 5mm too wide for the bolts).

Thanks for the info - I've been looking for one that was inexpenssive and good to use, the stock ones are not even worth the time!

Team Eddie

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07-16-2002 11:27 PM  16 years agoPost 6
vetrider

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Daleville, AL (Ft.Rucker)

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I've been told the 60 size muffler for a YS will fit the OS50 perfictly.
I'll know more later tonight as I just happen to have a YS 61 ST-2 muffler come avaliable. I'll do a follow up on fit tonight and performance test to follow that later this week.

Nolan

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07-17-2002 01:14 AM  16 years agoPost 7
Maxx

rrKey Veteran

Shreveport Louisana

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The YS exhaust bolt spacing is the correct one...I ran a .46 muffler on a Robbe Conquest with an OS 50 and it cooked plugs on a regular basis...I put on the old Hatori single O ring muffler off a YS .61 , opened the main needle about 1/2 turn and was a very happy customer! The .60 sized muffler is quiet too... the question is: why did OS make the bolt spacing on their .50 different than their .61 but the same as the YS??? Things that make you go huummm... Chris

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07-17-2002 03:39 AM  16 years agoPost 8
vetrider

rrElite Veteran

Daleville, AL (Ft.Rucker)

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Something is wrong
I took some pictures (below) and the holes on my YS pipe do not match up with the OS50 Hatori pipe I got from Ricks but does fits my OS50.

This YS60 pipe matches the hatori 985 I have for my YS80 but neither will match the OS50!

I'm only talking about the mounting hole alignments fellas.........just in case.


OS is on the RH side in pics


jbrundt, .... sorry for gettting off track here on your post.

Nolan

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07-17-2002 06:39 AM  16 years agoPost 9
fitenfyr

rrProfessor

Port Orchard, Washington

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Uh oh...
Eddie,
If it is not too late change that back to the 60 sized. The 46 will not breath enough for the 50. I have tried the Hatori 50 muffler.
Whoever you talked to has not done this obviously. The 60 muffler is a tad to long on the flange, but the slotted holes line up just fine.
I would put a little hi-temp silicone on it for a gasket and that is it.
The link I sent you is exactly what I have on my 50 it works.
Maybe they changed from the slotted hole to a drilled hole?
Either way I don't think your engine will be happy on the 46 sized one.
BTW I just spent considerable "quality" time with my Sceadu today.
First successful auto from about 30 feet out of a downwind turn to a slightly bouncy landing. Didn't even have time to hit the hold. Yep flamed out. ARRRRGGGGGH!
Good news is after spending about 3 working hours on the bird I fixed the problem I think. Looks like a kinked and rotten clunk line and some old fuel was the culprit. New 15% and a fresh clunk line and all is well.
Now if that MP on my Freya would just stay tuned.
I will try to post a picture of my Sceadu muffler in the next couple days. My Digital camera is at my embroidery shop right now.OOPS! Just looked at that they sure did change the flange. Guess I got an old style. I would still go looking for a 60 or get that one and slot the holes out. I have an extra, I was thinking of selling that was on the Freya guess I will hang onto that now.

Jason Stiffey
Fly Fast....Live Slow...

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07-18-2002 01:35 AM  16 years agoPost 10
coptereddie

rrApprentice

Maryland

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J: Thanks for the info - I will take heed to your advice...

I just got it in the mail today too - was getting real pumped up!!

E

Team Eddie

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07-18-2002 06:25 AM  16 years agoPost 11
DrScoles

rrVeteran

Redmond WA

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I'd stay away form the muscle pipe.. it delivers obscene power..but you already have that with the OS50... It wants to run the head too high ...fought with it for a few months...gonna try a muffler. I had to turn down my throttle curve to 80% at top and bottom of idle1.

Mike

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