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Old 06-24-2017, 04:24 AM
  #676  
Hobbsy
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http://www3.towerhobbies.com/cgi-bin/wti0095p?FVSEARCH=OSMG8460%0946104200

It appears to be in stock.
TowerHobbies.com | O.S. Rocker Cover FT-160

Manual here if needed. http://www.osengines.com/manuals/

Last edited by Hobbsy; 06-24-2017 at 04:37 AM.
Old 06-24-2017, 05:15 AM
  #677  
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Thank you for the link to the manual. The part that is damaged is the push rod cover not the rocker cover. I did get the parts to fix it just not sure its worth taking apart to change it.
The engine will be used on a 1/4 scale super cub that I'm going to redo this winter.
Old 06-24-2017, 12:37 PM
  #678  
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Sorry about that little miss, it should be an easy fix, you won't have to mess with the timing.
Old 06-27-2017, 10:34 AM
  #679  
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If the engine stops with the piston up in the pinch you have to be careful too. I was hit hard by the prop with the glow igniter attached and I bumped the prop off of the pinch. The prop came around hard.
Old 07-27-2017, 08:35 AM
  #680  
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Any OS 155 users out there. Can any of you comment on the performance/dependability of this engine. RPM and prop used would be helpful. Thanks
Jim
Old 07-27-2017, 11:32 AM
  #681  
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http://www.rcuniverse.com/forum/tach...-4-stroke.html

Jim, here is one mention of it, I'm looking for more.
Old 07-30-2017, 07:10 AM
  #682  
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Thank you, Dave
Old 08-17-2017, 03:27 AM
  #683  
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Is there a flex exhaust pipe available for the FT-160? I would like to run the exhaust inside the cowl and out the bottom.
Old 08-17-2017, 04:39 AM
  #684  
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smkrcflyer,

We may have solution for you. Give me a call if you would like to discuss it.

Jim
Old 08-17-2017, 06:54 AM
  #685  
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Here are the stock numbers and list prices of the parts you asked about:

OSMG2672 72108110 FLX PIP FS70-91 240MM US$49.99
OSMG2684 72108100 FLX PIP FS70-91 120MM US$37.99

These parts can be ordered through any hobby retailer who sells O.S. Max engines and accessories.
Old 08-17-2017, 07:01 AM
  #686  
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Thank you.
Old 08-29-2017, 07:23 AM
  #687  
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Hey guys, sorry to hijack, but I didn't find any other remotely active thread to ask this, but I have a small milk crate full of O.S. engines (2 stroke and 4 stroke) and I am trying to find out what distinguishing marks to look for to help identify them? I'm not new to Nitro, and I'm not new to planes, but I am new to Nitro Planes (if that makes sense) and I recently got a small SUV full of planes, motors, a few TX's and a bunch of parts. Trying to determine what is worth keeping/selling/trashing/giving away.
Old 08-29-2017, 04:21 PM
  #688  
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Default glow engines and stff

what I would do is make a list and post any info you can identify on the items and that would make information more precise and available good luck joe
Old 09-01-2017, 05:02 AM
  #689  
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O.S. FSa-72II Airplane Engine w/F-5030 Silencer | TowerHobbies.com

This is a new or recent release by OS Engines, a .72a II, a little pricey but probably a gem. I have the .56 version.
Old 09-04-2017, 02:21 PM
  #690  
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I have a 56a, 2-72a's, 3-81a's, 3-110a's and love them. I can't understand why the 72a was discontinued to make room for the 72a II and the 100-130 dollar price increase. It has a black valve cover and a new head, but $100 more? Seems that every time they bring out an engine the price goes up so much. The asking $480 price is only $20 short of their 155a pumped engine!
Karl
Old 09-04-2017, 03:27 PM
  #691  
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I try to not question why people do things, I recently bought a LASER 1.00 simply because I wanted one. Others will do the same with the OS 72 II, I'm sure. Some will think they're crazy but I won't be one of them because at 75 years old I still pull stunts like that.
Old 09-05-2017, 07:50 AM
  #692  
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Originally Posted by 1QwkSport2.5r
Everyone knows I'm not a fan of OS engines.. If I was a total hater, I'd just run it on some RC car fuel dead lean and let her melt down. But I'm not doing that. I'm doing some experiments to not only see what gains can be had, but also to test durability in the most unconventional manner possible. My hypothesis is the liner will peel at some point, but we will put that to the test. My test fuel has no synthetic oil in it (it seems to be castor oil tends to prolong the inevitable) and the nitro content is comparable to what many folks use in these engines. So if it survives my modifications, then we will test some more exotic fuels and tuning aids.


The fanboys will have a field day, but it's all in good fun. I can use a good laugh once in awhile. Besides... How often do you see an LA engine on a tuned pipe? I'm gonna try it.

Stop buying them......give the ones that you have to a kid or a newcomer. Just because "The Planet" uses OS Engines and has powered their models OR LEARNED TO FLY AN RC AIRPLANE using an OS engine doesn't mean they should be subjected to torture.....

poor little LA-25......

A much more satisfying test would be a video of you tapping the letters OS with a ball peen hammer on your forehead and measuring the the actual lump rise after each repetition.....(Smiles) Now THAT would be fun to watch.....

Last edited by Broken Wings; 09-05-2017 at 08:34 AM.
Old 09-05-2017, 08:31 AM
  #693  
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Originally Posted by broken wings
stop buying them......give the ones that you have to a kid or a newcomer. Just because "the planet" uses os engines as has powered their models or learned to fly an rc airplane using an os engine doesn't mean they should be subjected to torture.....

Poor little la-25......

A much more satisfying test would be a video of you tapping the letters os with a ball peen hammer on your forehead and measuring the the actual lump rise after each repetition.....(smiles) now that would be fun to watch.....
lmao.
Old 09-06-2017, 02:42 AM
  #694  
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poor little LA-25......

John, I have two of those little OS LA .25's, tough little engines and pull a Sig LT 25 like nobodies business. They are very "nomical" on fuel.

Last edited by Hobbsy; 09-06-2017 at 02:43 AM. Reason: Correct spelling
Old 09-06-2017, 04:31 AM
  #695  
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We had LA .25 racing and there was a 100 mile race every year. 1,400 laps. I am pretty sure they did not need new plating every race. This year it has been changed to LA .15 races with different planes, but there was a .25 race anyway from popular demand. I would get pretty dizzy and exhausted after the 160 lap final. There is a speed event on the west coast that is fairly popular. I am not too sure, but think they are at about 100 mph which isn't too bad for a beginners sport engine. For my money I would get the blue head ASP/Magnum, but I do have a few swap meet LA .25s that perform well. LA .10s, .15s, .40,s and .46s too.
Old 09-06-2017, 05:47 AM
  #696  
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The motivation for my LA25 modifications was spurred by this:
Part I: Flying Lines: Reworking the O.S. LA .25 for Northwest B Proto Speed
Part II: http://www.flyinglines.org/advanced%20rework.htm

Poor little LA25...
Old 09-06-2017, 06:03 AM
  #697  
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Gotta boogie till you bust. Should go real fast with a clean RC plane and a high pitch prop. That was the reference I was thinking of. I wouldn't go with the sub piston induction. A pipe maybe, and higher exh timing. Maybe 180 degrees after shimming the liner and probably grinding or milling the exh port to get that. The closing time on the crank should be 60 degrees. Is it missing the boost port? Without going downstairs, I think there are just two bypasses.

Last edited by aspeed; 09-06-2017 at 06:19 AM.
Old 09-06-2017, 06:18 AM
  #698  
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I figured when I am ready to test the addition of a boost port, I'd fit a piston and liner from a .25 FSR since I have a spare set - I put a new piston and liner set into my 25 FSR. The port size/shape and timing is virtually the same and the FSR set fits the LA perfectly. The larger carb from the FSR fits the LA as well. So with improved breathing and (later on) timing profile, it should run a fair bit stronger.
Old 09-06-2017, 06:26 AM
  #699  
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So you'll grind the path for the boost port in the liner, or the case? Really the FSR is a better candidate, but that would be too easy I guess. More fun trying to get the lipstick on the pig.
Old 09-06-2017, 06:35 AM
  #700  
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Originally Posted by aspeed
So you'll grind the path for the boost port in the liner, or the case? Really the FSR is a better candidate, but that would be too easy I guess. More fun trying to get the lipstick on the pig.
Yes, I'll cut a Boost channel into the crankcase. The crankcase is cast as if they intended to have a boost port, but never machined it in.

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