Cornduster04

I have been using the .46 FX for all my planes. I thought I would kick it up a notch to a O.S 50 SX
Any comments would be really appreciated..I want to put this into my my Twist 3D

I really didn't want to go 4 stroke and I really like the OS reliability, rarely get a dead stick on these engines.

O.S 50 SX just as good?? Does it really live upto the 10% power increase over the .46FX?

Thanks

Frank

RVman

hello
I have seen an OS 50 run and it was quite good. It does have more power than an OS 46 but i don't know if it is worth all the money. There are many other good 50 size engines that you could look at; Webra, Irvine, MVVS, and more that produce similar or more power than an OS 50. I have the Webra 50 and it runs amazing, no deadsticks ever since breakin and no other problems except a few with getting the needles set right after I installed a mousse can.

Tom

Cyclic Hardover

My Feedback: (3)

Based on what I have seen around here, the 50 sx runs good but at that cost, get a 61fx is a better performing engine for the exact same cost.

tIANci

Snoop ... the 61 is 6-7 oz heavier on the nose and you will probably end up adding about 2 oz on the tail if the plane cannot allow you to place the battery further aft. That means another 8-9 oz on the AUW, I did that before, 40 sized plane with a 60 2C is not really worth it. May be worth it if you are a total speed freak or total 3D nut ... hehehe ...

w8ye

My Feedback: (16)

There are two SX's at the flying field among a gaggle of 46FX's. They have a noticeable amount of additional power over the 46FX.

They are beautifully made but I've often wondered about the extra cost though?

I've just put a new Frank Bowman ring in one among doing several other things that were the fault of the owner. I'm supposed to put a new ring in the other one next week becuase it's compression is down. It has a good bit of time on it. I sort'a figure a 46FX would still be going OK?

It's a pleasure to work on them.

Enjoy,

Jim

Razor-RCU

My Feedback: (50)

I LOVE my OS-50SX.

I got it used on a Topcap with a Tower muffler ($15-) and it had RIDICULOUS power--- Similar to my Irvine-53 on a 12x4 APC... Always runs perfectly, now it is on a GP Patriot with a 9.5x8 APC

I would hesitate paying the higher price against an Irvine-53, Webra-50GT, or MVVS-49 but it DOES have NOTICEABLY more power than the 46FX/AX

Cheers!

Cyclic Hardover

My Feedback: (3)

There are a couple guys here usung the 50sx-H Helicopter engine, on their planes.

tripp3d

In my experience with the OS 50sx I absolutely loved it at first, it would never deadstick. Ended up being good and bad... After running the engine a while I think I had a bad needle valve bc I notice bubbles in the line going to carb, the engine leaned out in flight but instead of just getting hot and quitting like and ABC engine might, the engine continued to run and ate up the ring. Its my fault for not fixing my initial problem, but IMO I'll agree with w8ye I think a lot of ABC engines would still be running!

csisfun

I LOVE this engine!

It certainly has a LOT more power than my OS 40 FX. With the 40 FX, I couldn't even 3D at full throttle, but with this motor, I could 3D at less than half! Unlimited vertical was not a problem too. It really is a good motor.

The extra cost will make it difficult to justify. I would buy another engine if I judged the engines by prices.

Just wondering, how much heavier is this engine as compared to a 40 FX?

lbianchi

Another choice is the ASP/Magnum 52 S Long Stroke... more power, half price (Magnum: $ 80,00 on Ebay, O.S. 160$ on shop).
Read one test here: http://www.justengines.unseen.org/ASP52r.htm.
In these tests (using standard 17% oil, 5% nitro fuel), O.S. no8 plug and APC props, after 15minutes of 'running in' (on both engines) the following performance was recorded:

Prop. ASP .52's' ASP .52's' Irvine .53
ASP Quiet Silencer ASP 'Super Quiet' silencer Irvine 'Super Quiet' silencer

11x6 12,200 12,300 12,250
12x6 10,500 10,800 10,700
13x6 9,550 9,800 9,700

Another test here: http://www.justengines.unseen.org/ASP52r.htm

PS: muffler and accessoires are the same as OS

Cornduster04

Thanks for all of your Feedback on this!!!

I have only used OS and TT .46 up til now. I did buy the OS 50 SX from Tower for 159 minus a 25 dollar coupon. which is $134.00. I have had great experience with the OS engines and thier warranty. I crashed a 40 LA once and shipped it back to OS and told them I broke it and they sent me a new motor anyway. For that reason I am pro O.S...but I do not have experience with anything else but Thunder Tiger..

Thanks Again!!!

Frank

Tiroloco

My Feedback: (1)

You won´t be dissapointed, the O.S. 50 SX worths every coin.
Very reliable, very powerfull, like having a Ferrari engine in your plane (some status as well).
I have two of them, one in a GP Venus 40 moving a 12X4 APC at 14,400 rpm with tower hobbies oversized 20% muffler, the other one is moving my H9 Twist 40 up to 13,600 rpm with APC 12.25X3.75 using also an oversized TH muffler.
The best weight/power relationship 0.50 engine in the market.

Regards.

Razor-RCU

My Feedback: (50)

Geesh! Once again I see someone saying the Magnum-52/ASP-52 is MORE POWERFUL than the OS-50SX and the Irvine-53?.... Even if it is true (and I am not saying that it is--) It does not matter if the midrange sucks or if you have an air-leak....

I have flown the OS-46FX/AX, TT Pro-46, Webra-50GT, Irvine-46 & 53, ASP-46, Rossi-45, Jett-50, Fox-50 yatta yatta... and the OS-50SX is one of my favorites! Worth every cent--

Jack Hyde

My Feedback: (1)

Corn,
I am in the same boat you were when this thread started. I want a better engine for my next 40 size 3d plane. I have an OS 46 on a Burrito and want to try a grade better (hopefully) on my new Mojo 46.
The last time I was shopping for a 40-50 2stroke Mag 52 xls was the hot ticket and I got one. Mine has the crummy transition condition that is common when people with not the right stuff try to use them. It starts and runs fine , good power , but stumbles thru transition dying 10%of the time - not good for 3d.
I have an OS 46 fx on a Burrito and it flies it fine. I want to try something a little better on my new Mojo 46, so this time I shopped the $100 - $170 price range.

Reading the various forums it seems that the Webra 50, Irving 53 and OS 50 are considered the next step up engines that do a good job. From what I have read I would go for an Irvine (close to same price as the OS 50) but it must be imported. Webras are great when they work - lots of tinkering and a fair percentage are returned for not working. Jetts are just too expensive - maybe some day. MVVS, etc are rare in my area. I have never seen one. Also the local engine gurus all own and love OS like they invented them. If I got something else I have to hear the I told you so every time anything less than perfect happens.
Regarding price Tower is offering $30 off and I get free shipping. Not bad for an engine that 90% of the negative comments are directed at the $160 price.

I already have a YS 63 and I am happy with it. I am looking for a 2 stroke right now.

Razor-RCU

My Feedback: (50)

Aha!

Oh yeah, I have read great things about the MVVS-49 and want to get one...

Cornduster04

Thanks for all of your feedback..The OS 50SX will be bolted to my Twist this season..I will post updates..

Thanks again..Really Appreciated it!!!

MarkNovack

My Feedback: (3)

I also had a few 50SXs. Great running motors. Very reliable. About 8-10 tanks for complete break-in. Afterwards, throttle response is OS smooth and perfect. Yes, you can buy a cheaper motor, but an O.S. 50SX has never put a hitch in my day. I'll take a trouble free season and finger flipping starts for an extra $50.00.

Tiroloco

My Feedback: (1)

Frank:
I have the same configuration you want setup on your H9 Twist 3D.
My Twist is attached with an O.S. 50 SX turning some times an APC 12.25X3.75 some others an APC 13X4W using an oversized Tower Hobbies muffler.
You will get more speed with the 12.25X3.75, but for 3D aerobatics, I think 13X4W will be better, your plane will fly slower than using the 12.25X3.75 but the vertical will be a little bit better.
With any of these propellers, I can hover my Twist at about half throttle with absolutly no problem, at full throttle the plane gets unlimited vertical performance, it takes off in less than 5 meters!
As an advise, try to add to your receiver an airplane gyro to compensate for rudder, you will be impressed about the performance of this plane with this setup configuration.
Last sunday was very windy, and I got my plane to hover almost a minute.

Have my best regards and have fun!

RV

Runway

Cornduster04
I've got an OS50sx and love it. However, is it worth mentioning that it is a ringed engine [ie not ABC] and therefore needs a different 'run-in' procedure [needs a richer mixture] from new, if it's not to be ruined?
Forgive me if you know this.

Good luck
Runway

Cornduster04

Hey Guys!!

That all sounds like really good news about the OS 50SX and my Twist!!! I will have to get a couple of props!!

I appreciate the info about the run in on the motor, I might of over looked that..whew..

Excellent information...Thanks!!!!!