skeeter_ca

Has anyone heard any gossips or rumors about OS Engines producing a .91 size AX engine. I love my .46 and am looking to buy a .91 size engine for a SS60 plane i'm building. It seems they have replaced some of the FX engines with AX's. Maybe the the .91FX is next.

skeeter

Lomcevak Duck

My Feedback: (14)

I have not heard anything about a .91AX yet, but the .91 FX is an excellent engine.

smithth

Skeeter, I have a 91 fx if you would like to buy it from me. I used it only a few times and it ran great. It is currently looking for a new home.

smithth

Drop me and email if you would like to know details.

[email protected]

ChuckW

The 1.20-AX is intended to mount in the same space as a .91.

skeeter_ca

The FX was what i was intending to use and was going to be needing it in about 2 months. I thought if an AX was in the plans i would buy that instead. I know the 1.20AX mounts in the space of the .91 but i think that would really be pushing the envelope. Larger prop, less clearance, uses more fuel. I think the .91 would be more optimal.

skeeter

FLYBOY

My Feedback: (11)

I hope they do. I have the 55 and love it.

I wouldn't touch another FX engine if it was given to me though. They are the worst crap on the market. I have sent 4 back to OS that they refunded and have one in a plane I bought last year and ran it one time, it has the same problems that the other 4 had and it is gone as soon I have the chance to pull it.

Gray Beard

My Feedback: (-1)

Just what are the problems?? When they first came out there was a problem with the first batch or two with chrome peeling from the cylinder but that was fixed right away. Other then that early problem I have never seen any others. At one of my clubs there was a racing class that called for the .46FX so there were about 25 of them just in the one racing class.
Just wondering??

FLYBOY

My Feedback: (11)

My 46 FX runs fine, but every 91 fx I have seen runs hot, quits very eary in the flight and burns up fast. I haven't run them for a couple of years, but the one I got last summer did the same thing. It ran fine till it got airborn, then got hot and quit. It was a terrible design. The SF and FP series were great, and the AX so far seems to be a very good engine. I have met a few people that like the FX engines, but I have met a lot more who don't. I wouldn't take another one, but would love to get my hands on a 91 AX. The 55 AX was a very nice engine

Redback

I have had a 91FX in a TF Corsair for a couple of years now and it has always run fine. It replaced a ST75 which gave me nothing but trouble.

I just hope I haven't jinxed myself by mentioning this

Terry

Gray Beard

My Feedback: (-1)

I don't think you will but who knows. I have never used or worked on the OS.91 to say anything good or bad about them, it's just one of those sizes I don't see very often. I only have the SK .90s and think they are one of the best engines ever built, that and only a hundred beans a piece!!!

Augie11

The experience I've had with the AX's has been very good. But with two .91FX's in tight cowls inverted I couldn't be happier. Sorry some of you folks have had problems with them.

FLYBOY

My Feedback: (11)

You will be fine. The guys that got good ones can't be happier. The guys that got bad ones won't use them again. I sold mine today in the plane it was in. I was going to just sell the engine but sold my 2 33% birds and he decided he wanted that one too. That works. I hope he has good luck with it. Heck, it could be the fuel, I have seen that before too.

Oh well, I will get the 120 AX if they don't ever do a 91. Would rather have the 91 though. I wonder how an FX would run with an AX carb? HMMMMMM< theres an idea I need to do some research on.

That may be a really good combo.

delman

My old 91fx has worked good for a few years with a magnum 91xls carb - needle valve on the carb. AX - if it fits try it.

skeeter_ca

I knew it!!!! I knew!!!! I knew it!!!!

They did come out with one. I almost bought the FX last weekend. Boy, am i glad i didn't. Now i can go get my .95AX.

http://towerhobbies.com/products/os_.../osmg0580.html

I just hope Hobbypeople will stock it soon!

skeeter

da Rock

Just a couple of notes...........

Tower lists the new engine as a ".95AX ABL Ringed ". That's maybe correct, maybe not.

The previous ABL engines do NOT have ringed pistons. They made the same mistake when the 55AX came out, saying it was ringed.

The specs in the Tech Info on the engine do however back up the ".95 cu in" displacement. The engine does seem to be a .95, not a .91.

skeeter_ca

I checked the OS website and they do say it's a .95 but mention nothing about ringed. Check the parks list also does not have a pistn ring for the .95, just for the .91fx. So i would assume it is not ringed as you have mentioned. But i still hope it's a real performer.

skeeter