General consensus of the OS AX series engines  
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General consensus of the OS AX series engines - 6/27/2008 10:40:50 PM   
Broken Wings



Posts: 491
Joined: 1/15/2003
From: Spaceport, FL, USA
Status: online 		These have been out for a little while now and I have a co-worker that wants to sell me a NIB AX75. Said he'd let me have it for $125. I looked at it and it's never been used. (he needs tires........smiles)

For those of you who are using the AX series what's your general opinion?

I haven't bought a new OS engine in years.

Do you like the ABL "technology"....?

I’m not sure I like the way the muffler looks as it resembles the shape of my head…..





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Regards,
John
       Post #: 1

RE: General consensus of the OS AX series engines - 6/27/2008 10:57:01 PM   
draftman1


 

Posts: 409
Joined: 9/4/2007
From: Strathmore, CA, USA
Status: offline 		the 75 should be a great engine. I have had experiences with the 46, 55 and 120, all have been very good. Im sure the 75 will be also. Iwouldnt hesetate buying th ax series at all.

(in reply to Broken Wings)
       Post #: 2

RE: General consensus of the OS AX series engines - 6/27/2008 11:14:32 PM   
w8ye



Posts: 17462
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: offline 		I have a friend that owns a 75AX. He raves about how great it is all the time. He owns mostly four strokes and is not mechanically inclined.

I fly with a person who owns a 120AX. He has had it since they came out. It is inverted in a UCD60. It has always performed very well. It is his favorite plane.

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Attended the CutFinger Institute of DirtNap University for years but never did graduate....

Club Saito Member #7
Original AMA #31261

(in reply to draftman1)
       Post #: 3

RE: General consensus of the OS AX series engines - 6/28/2008 1:46:25 AM   
XJet


 

Posts: 3452
Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
Status: offline 		I don't think you'll find anyone complaining about the construction, quality or performance of the AX series.

It looks as if OS have got it right again (after the issues they had with the FX series).

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When I'm not here, I'm at RCModelReviews

(in reply to w8ye)
       Post #: 4

RE: General consensus of the OS AX series engines - 6/28/2008 2:19:22 PM   
CustomPC


 

Posts: 349
Joined: 4/19/2004
From: SydneyNSW, AUSTRALIA
Status: offline 		I love them.

I've owned .46, .55, .75 and 1.20AX's.

They've all been supurb engines which start easily and run reliably. I'm so happy with their characteristics so they are the only engine i run these days. I've sold all of my 4-strokes and stick to AX's with one standard blend of fuel (5% nitro, 15% Synth, 3% Castor).

I probably won't buy the new .35AX as i have no models in that size range. I hoping they update the .91FX to an .9?AX to fill the gap between the .75 and 1.20. A .91 ported for torque like the AX's tend to be would be a great addition to the range.

P.S. My .75AX turned an APC 14x6 at 10,300 with the stock muffler. That's almost as good as the .91FX. I had it on a GP Super Skybolt and it was fantastic.

< Message edited by CustomPC -- 6/28/2008 2:22:18 PM >

(in reply to XJet)
       Post #: 5

RE: General consensus of the OS AX series engines - 6/28/2008 4:33:26 PM   
rainedave



Posts: 5175
Joined: 7/21/2005
From: Greensboro, NC, USA
Status: online 		My AX .46 and AX .55 are becoming my favorite engines. I'm using Powermaster GMA 5% (messy stuff) and they both love it. My only criticism is the use of four head bolts instead of six. But, maybe my thinking is just old fashioned.

David

(in reply to CustomPC)
       Post #: 6

RE: General consensus of the OS AX series engines - 6/28/2008 4:39:49 PM   
Hobbsy



Posts: 10677
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		I can only vouch for the 1.20AX, 5 bolt head, it's a fine engine, I have SuperTigres with 4 bolt heads and Fox's with 8 bolt heads, neither has ever leaked or fallen off.

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(in reply to rainedave)
       Post #: 7

RE: General consensus of the OS AX series engines - 6/28/2008 5:39:54 PM   
Ed_Moorman



Posts: 3683
Joined: 1/5/2002
From: Shalimar, FL, USA
Status: offline 		I've had 4 of the .46AX, 2 of the .55AX and a 1.20. They have to be the easiest to run and most reliable engines made. The new carbs on the .55, .75 & 1.20 are just fantastic. All the controls are on one side-easy to get to. Over a year's flying, I rarely have to adjust anything.

The .35AX seems a little pricey.

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R/C Report Magazine, Fun Aerobatics Column

(in reply to Hobbsy)
       Post #: 8

RE: General consensus of the OS AX series engines - 6/29/2008 5:37:56 AM   
Cyclic Hardover



Posts: 7218
Joined: 5/7/2002
From: New Mexico, USA
Status: offline 		Yeh, go with it. Personally I think a 75 is a pointless engine but it allsounds good

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Retired Army Aviator - Excuse Me! You sold me a hair with a cake around it!

(in reply to Ed_Moorman)
       Post #: 9

RE: General consensus of the OS AX series engines - 6/29/2008 7:35:49 PM   
checkmate91



Posts: 120
Joined: 4/21/2005
From: Essex, UNITED KINGDOM
Status: offline
quote:

ORIGINAL: Cyclic Hardover

Yeh, go with it. Personally I think a 75 is a pointless engine but it allsounds good


Unless they don't replace the 91FX and just stick with the 75 and 120...

I love my 55ax, sounds like a scooter on light throttle but goes vertical for as long as I want on a 12x6 in my BH Super Air. Easy start, no messing with needles (once broken in and tuned), just go fly. Great engine.

Regards,
Andy

(in reply to Cyclic Hardover)
       Post #: 10

RE: General consensus of the OS AX series engines - 7/10/2008 3:36:32 AM   
Mustang Fever


 

Posts: 1195
Joined: 11/30/2003
From: Cadillac, MI, USA
Status: online 		I like the series. Well made, reliable, easy to start and gobs of torque.

I have the 46, and two 55s, with a 120 on the way for a Topflite 1/7 Mustang.

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Bob Hunt

(in reply to checkmate91)
       Post #: 11

RE: General consensus of the OS AX series engines - 7/10/2008 3:44:55 AM   
Broken Wings



Posts: 491
Joined: 1/15/2003
From: Spaceport, FL, USA
Status: online 		I bought the .75 and have bench run it only. I like it.

Now that the OS prices just went up I like it even more.

_____________________________

Regards,
John

(in reply to Mustang Fever)
       Post #: 12

RE: General consensus of the OS AX series engines - 7/11/2008 3:27:25 AM   
Cyclic Hardover



Posts: 7218
Joined: 5/7/2002
From: New Mexico, USA
Status: offline
quote:

ORIGINAL: Broken Wings

These have been out for a little while now and I have a co-worker that wants to sell me a NIB AX75. Said he'd let me have it for $125. I looked at it and it's never been used. (he needs tires........smiles)

For those of you who are using the AX series what's your general opinion?

I haven't bought a new OS engine in years.

Do you like the ABL "technology"....?

I’m not sure I like the way the muffler looks as it resembles the shape of my head…..







OS are good engines, I have several of all sizes. I would not own a 75 as with whats available, I think its a pointless size but thats me. It does sound like a good deal though

_____________________________

Retired Army Aviator - Excuse Me! You sold me a hair with a cake around it!

(in reply to Broken Wings)
       Post #: 13

RE: General consensus of the OS AX series engines - 7/11/2008 3:30:46 AM   
Broken Wings



Posts: 491
Joined: 1/15/2003
From: Spaceport, FL, USA
Status: online 		I agree, I think of it as a strong 60...

_____________________________

Regards,
John

(in reply to Cyclic Hardover)
       Post #: 14

RE: General consensus of the OS AX series engines - 7/12/2008 5:17:15 AM   
Cyclic Hardover



Posts: 7218
Joined: 5/7/2002
From: New Mexico, USA
Status: offline 		Or a weak .90!

_____________________________

Retired Army Aviator - Excuse Me! You sold me a hair with a cake around it!

(in reply to Broken Wings)
       Post #: 15

RE: General consensus of the OS AX series engines - 7/13/2008 4:09:23 AM   
Kweasel


 

Posts: 1087
Joined: 1/7/2004
From: fort worth, TX, USA
Status: offline 		The price is right, you will enjoy it a lot. Dont worry about its size power, prop it for 12,000 and it will do as well as most 91 turning less.

(in reply to Cyclic Hardover)