Rate1

This engine it is far easier to start with an electric starter. You don't need to place the tank close to the engine. In fact the purpose of the pump is to have the choise to place the tank where ever you want. Myself placed the tank right on the center of gravity. Use Minnflyers advice and go for 15% fuel, I used an APC 16x6 prop, if you are looking for more speed go for a 15x8.

I followed the instructions included in the box and my engine started on the first attemt and stayed running. It is a sweet engine with an amazing sound to it.

Whistling Death

I Have
1 OS .91 FS Surpass II
3 OS .65 LAs
I have just started my collection.

NM2K

My Feedback: (14)

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My Enya 80-4C ran well pulling a MAS 14x6, but I didn't really have sufficient ground clearance on my CGM Anniversary Cub to keep using it. I instead ended up using a MAS 13x6, which really let the Enya 80-4C (really .74 CID) turn up. I was surprised to find that the engine and plane with the 13x6 prop was actually quite a hotdogger.

I wish now that I had tossed the factory aileron torque rods and installed separate servos with larger ailerons, a larger rudder and braces between the vertical/horizontal stabs. I built mine with the full length wing. I should build another one. <G>


Ed Cregger

Dan Vincent

Hey, I've got some old OS engines...

OS Max-6 .061
OS New Model .099 Twinstack. Prop screw (1st mod.)
OS Pet "A" .099 Mk-1
OS Pet "B" .099 MK-II, Ser. A
OS Pet "C" .099 MK-II, Ser. B
OS Pet II .099 Mk-III, Ser. A
OS Pet II .099 Mk-III, Ser. A (R/C)
OS Pet II .099 Mk-III, Ser. B
OS Pet II .099 Mk-III, Ser. B (R/C)
OS Pet III .099 Mk-IV
OS Pet III ,10 Mk-IV (R/C)
OS MAX ,10 Std
OS MAX ,10 RC
OS MAX .10 RC
OS MAX ,10 "Marine"RC
OS MAX ,10 .10 SR RC
OS MAX ,10 SR Marine
OS MAX ,10 FP RC
OS MAX ,10 FP MARINE
OS Max-I .15 STD.
OS Max-III .15 R/C
OS Max F/S .20 Fourstroke
OS ,25 FX-RC
OS Max-I .29 Stunt small (MAX-1 letters)
OS Max-I .29 Stunt large (MAX-1 letters)
OS Max-II .29 Stunt (Type-1 Ridge type)
OS Max-II .29 Stunt (Type-2 Heavy Case)
OS Max-III .29 Stunt
OS Max-III .29 X
OS Max-II .35 Stunt
OS Max-H .35 Stunt

NOTE: If the .09 Pet types are confusing, check out this old posting.

http://www.rcuniverse.com/forum/m_19...tm.htm#5308670

gunfighterII

Dan,
Impressive list of old engines,

Here's my 20 year collection,

O.S. 46 SF ABC-P
O.S. 61 RF ABC-P
O.S. 61 SF ABC-P
O.S. FS-91 Surpass
O.S. FS-91 II w/pump
O.S. 1.08 FSR (2)
O.S. 120AX
O.S. 160FX
O.S. FT-300

jdr43

Anyone have any info on the new OS-56 4 stroke comming out ?

http://www.os-engines.co.jp/english/...ha56/index.htm

Jim
Bella Vista AR

misplacedtexan1

I GOT AN O.S .55AX JUST RECENTLY. ANYONE HAD ANY EXPERIENCE WITH THIS ENGINE? WHAT DO YOU THINK ABOUT IT?

misplacedtexan1

DOES ANYONE KNOW WHERE I CAN FIND ALUMINUM CARBURETOR THROTTLE CONTROL ARMS REPLACEMENT FOR MY O.S. ENGINE?

NM2K

My Feedback: (14)

Go to www.heliproz.com. They should have a variety of aluminum throttle arms for that engine.


Ed Cregger

misplacedtexan1

THANKS ED FOR THE INFO. ALAN

cloudancer03

My Feedback: (22)

my os 91 surpass was submerged underwater due to basement flooding.still in the box b rand new .is this the end of it or is it savable?

TimC

How long was it submerged? The engine was shipped with the insides coated with oil. Maybe there was enough to protect the steel parts for a short time. Pull the back plate and glow plug and give it a good dose of WD-40. Blow this out and follow with your normal after run oil. Check for rust while you have the back plate off. If you don't want to do all this, flood it with WD through the crankcase vent and glow plug hole, then fire it up as soon as possible and see how it runs. Do you have a test stand?

cloudancer03

My Feedback: (22)

it was under maybe 2 days..but obviously it takes a while to dryout.I am going to take everyones advice .IU have a friend that can get the engine as I am in florida another week but he is an experienced rc'er so he can get oil in it remove the back plate and then fire it up to make sure its working.the good thing he has and uses os engines..what a week!

TimC

To anyone who hasn't had to go through their engine and is curious what the spiral gear drive for the O.S. camshaft looks like, I pulled this photo off the web. I haven't seen it posted here at RCU before.

hestvikauto

Finnally the Os Fs-200U is here in Norway.
I just ordered this engine and will give a report whith maybe a small video when i recieve it.
They say it is only 1.83 lb (830 g)
+ muffler and that is light. I wonder what they have done to make this engine lighter than theyr 120?
If it runs as god as my 120 i will be happy.

http://www.elefun.no/webshop/aspx/pr...kategoriID=157

woodworm

Hi, i have some OS too...

4 stroke:

fs 26 s
fs 40
fs 40 s
fs 48 s
fs 52 s
fs 60
fs 61
fs 70 s
fs 91 s
fs 120
ft 120
ft 160
ff 240
wankel

y dream of the new il 300 but the price is a nightmare...

woodworm

orstraycat

I am looking for a tuned muffler for a OS BGX engine, anybody know where I can find a aftermarket tuned muffler for it ?????.

z-plane

Morning Gents,

I haven't followed this thread all the way back to the begining but I like to ask a question that may have been addressed before. Does anyone have any negative impressions with the remote needle valve location on the OS FX engines? Do you find that the remote NV location directly effects the precision of tuning the carb mix? I'm looking to buy a new O.S. .91 FX and don't have experience with remote needles.

Also, does anyone have any experience mounting the engine at 45 degrees, or inverted, with a remote needle valve … how well does that work?

Thanks!

TimC

z-plane, there were problems with some of the early .91FX engines and the remote needle assembly. I have one of these early engines and although I never had any problems with it, I upgraded to the newer needle valve. I've had no problems at all with any of my O.S. engines and their remote needle valve. It would seem that one advantage of the remote valve is that if it has started to suck air, you can spot the bubbles in the line to the carb. On a carb mounted needle valve, this is not possible. My expensive Jett engine has a remote needle valve, if this tells you anything.

turnyank

My Feedback: (11)

Anyone breaking down a 120 series11 I need a carb

orstraycat

Well I found that Hatori makes a muffler #850 for the OS BGX.

z-plane

Thank you for the insight, TimC.

EyeflyRC

My Feedback: (147)

Waco Driver,

I noticed you have an OS 80 H R/C. I just recently purchased a new one and was wondering how you like yours. What is the best combination of prop and fuel for this beauty?

Thanks,
Andrew

tarite

Hi guys, new member here.
Been into rc for 19 yrs. Started with a Kyosho motorcycle,
was flying a Byron A4 Skyhawk ducted fan by 95 and put everthing away
around 97 after I lost interest in flying and did 10scale nitro onroad for a few more years.

It's been around 10 yrs since I've flown. I have a laser 200 arf with the 46SF,
a perry pump and stock exhaust. It crashed way back when and was put it away
with a busted mount and some slight cosmetic damage... no engine afterrun oil or anything
There it sat for 10 yrs in a garage in a norther climate.
This spring I cleaned out my garage and decided to pull everything out and do some flying.
Did some prepwork and put some prather after run in the cylinder and spun it a bit.
I have a gallon of 10% fuel with additive to make a smoke trail from a ducted fan
and it had evaporated about 3 inches from top in 11 yrs.

Moral of the story.... Today a dirty old OS 46SF-ringed engine put away with no cleaning,
left in cold wet garage for 10 yrs,
using old evaporated 10% fuel,
fired right up and ran great!!
No Flameouts, nothing but air.
I think it was running 2-3k slower but not sure how much, tach battery was dead.
Ran well enough to fly the lazer just fine.
btw: the laser200 was made for a 60 size engine but I adapted it to fit the 46
and I also used a 11x7 APC instead of the usual 10x7 Zinger I run.

I think that says alot for O.S. Engines.
Here's what I have/had:

FP25 - ran ok, sold with 25 trainer

FP40 - ran ok, let friend use it his plane...
he thought the piston looked to dirty
so he sanded the piston. duh, enough said!

SF46-ringed - runs great in upright or 90 mounting but
was prone to flameout running inverted in
a dago red mustang, hot plug helped

SF46ABC-P - ran great in patriot 40 with os pump and mac pipe,
have not tested it yet. That next


Just wanted to share my story of reliability
Glad to be back
tarite

turnyank

My Feedback: (11)

Hi everyone,
PLEASE!!!!!!! can anyone help with a carb housing for an OS 120 FS Series, not the Series 111 apparently that won't fit...but y'all can happily prove me wrong, I don't want to have to throw the engine away it still has at least another 5 years in her.