Author Topic: OS Does it again! (Read 6377 times)

Joe Mader · « **on:** February 21, 2007, 04:19:00 PM »

Just heard the official word that OS has discontinued the .40LA-S. They hope we will use the .46LA-S or the .34 Super Tigre. Just wanted to let you know.

Joe

Keep going in circles.

Randy Powell · « **Reply #1 on:** February 21, 2007, 04:48:49 PM »

It a rule with mass manufactured engines used in control line. As soon as it is accepted and used, it will be discontinued. ST60, Magnum 53, OS40VF, ST46, etc.

Glad Richard and Randy are making engines.

Bob Reeves · « **Reply #2 on:** February 21, 2007, 04:53:09 PM »

Quote from: Randy Powell on February 21, 2007, 04:48:49 PM

Glad Richard and Randy are making engines.

And don't forget Brodak, the Brodak 40 is a better engine than the OS, I won't miss it.

john e. holliday · « **Reply #3 on:** February 21, 2007, 05:07:39 PM »

An the RO-Jett 40REBS outdoes both of them. Of course I like all three of them. At Tulsa last year I just was not screwing the needle in far enough on the Brodak 40 and had wrong lines and handle. Guess that is what happens when you don't keep records. DOC Holliday

Bob Reeves · « **Reply #4 on:** February 21, 2007, 05:18:11 PM »

Quote from: john e. holliday on February 21, 2007, 05:07:39 PM

An the RO-Jett 40REBS outdoes both of them. DOC Holliday

For the price it had better, like compairing a Toyota to a Mercedes

Leester · « **Reply #5 on:** February 21, 2007, 05:29:17 PM »

That was quick, Tower doesn't list the 40 LAS anymore. But they still show the LA 40

Wynn Robins · « **Reply #6 on:** February 21, 2007, 07:25:09 PM »

The 46 is better anyways....same body, but lighter with more power.....not really a bad move by OS....

Ken Deboy · « **Reply #7 on:** February 21, 2007, 10:37:53 PM »

Are the RC and CL versions timed differently or is the only difference one has a carb and one has a venturi?

thanks,
Ken

Dennis Moritz · « **Reply #8 on:** February 21, 2007, 11:33:13 PM »

The LA46 means .018s. On the other side of the issue, many LA40s I've seen were converted RC engines. They're cheap when bought at an RC Swap. Same with RC 46s. Seen lots of those converted. Add a gasket or two. I think they're timed the same, use the same piston/cylinder.

Bill Little · « **Reply #9 on:** February 22, 2007, 06:44:28 AM »

Quote from: Ken Deboy on February 21, 2007, 10:37:53 PM

Are the RC and CL versions timed differently or is the only difference one has a carb and one has a venturi?

thanks,
Ken

Until Randy Smith, or one of the other "engine guys", tells me different, all I have heard is that the difference is the carb vs. venturi.

Bill <><

Dwayne · « **Reply #10 on:** February 22, 2007, 01:53:00 PM »

The R/C and U/C versions are identical in every way, just put a venturi on the R/C version and you are good to go. And IMHO the LA. 40 is the best bang for the buck 40 on the market!!

Dwayne

RandySmith · « **Reply #11 on:** February 22, 2007, 03:18:52 PM »

Quote from: Bill Little on February 22, 2007, 06:44:28 AM

Until Randy Smith, or one of the other "engine guys", tells me different, all I have heard is that the difference is the carb vs. venturi.

Bill <><

HI Bill

They are or were differant, first ones out had 4 ports, then they made the CL versions with 3 ports, now they show them as back to 4 ports
Also a few of the ones I got in had a little differance in the mufflers , I think at first they put the OS 35 FP muffler

Regards
Randy

Leester · « **Reply #12 on:** February 22, 2007, 03:21:40 PM »

One thing with the LA you can get the natural case a couple of bucks cheaper than the Blue. $4.00 cheaper to be exact.

Robert McHam · « **Reply #13 on:** February 22, 2007, 03:42:11 PM »

It also seems this little jewel from O S is no longer available. I think it would be a great candidate for the 1/2 A carrier event.

Such a shame its so purty and I don't have even one!

Robert

Alan Hahn · « **Reply #14 on:** February 22, 2007, 07:16:27 PM »

Hmmmm, must have found a way to make it cheaper!

Kidding aside, I think OS knows that they can sell more engines by changing appearance of the engine. I have nothing against the manufacturer finding a way to make cheaper products--as long as the overall product still performs. I think the LA was all as good as the old FP. Certainly no FP ever worked as well out of the box as the LA46. If they wouldn't find a more economical way to make it, they would probably go out of business.

Warren Leadbeatter · « **Reply #15 on:** February 23, 2007, 06:17:50 AM »

Hi Guys,

According to all the info I've seen there is no difference between the R/C and C/L Versions other than the obvious. ie Venturi instead of Carby.

According to this LA46 Engine Test article in Australian Control Line News from 2 years ago, you can get a better run for Stunt out of the LA46 if you change the port timing slightly (instructions provided in the article), add a couple of head gaskets, and get rid of the remote NVA.

Click here http://www.vicstunt.com/Newsletters/ACLN/Issue70.pdf

ACLN - Australian Control Line Newsletter Issue number 70

Cheers

P.S. that little OS 6 mc is a little gem. I want one.

Bill Little · « **Reply #16 on:** February 23, 2007, 06:37:45 AM »

Quote from: RandySmith on February 22, 2007, 03:18:52 PM

HI Bill

They are or were differant, first ones out had 4 ports, then they made the CL versions with 3 ports, now they show them as back to 4 ports
Also a few of the ones I got in had a little differance in the mufflers , I think at first they put the OS 35 FP muffler

Regards
Randy

Thanks, Randy!

Bill <><

dennis lipsett · « **Reply #17 on:** February 23, 2007, 08:21:29 AM »

Quote from: Warren Leadbeatter on February 23, 2007, 06:17:50 AM

Hi Guys,

According to all the info I've seen there is no difference between the R/C and C/L Versions other than the obvious. ie Venturi instead of Carby.

According to this LA46 Engine Test article in Australian Control Line News from 2 years ago, you can get a better run for Stunt out of the LA46 if you change the port timing slightly (instructions provided in the article), add a couple of head gaskets, and get rid of the remote NVA.

Click here http://www.vicstunt.com/Newsletters/ACLN/Issue70.pdf

ACLN - Australian Control Line Newsletter Issue number 70

Cheers

P.S. that little OS 6 mc is a little gem. I want one.

WARREN,
tHERE WERE ONLY 70 OF THOSE LITTLE COMMERATIVE 06'S AVAILABLE. tHEY WERE DISTRIBUTED SUPPOSIDLY BY A DRAWING, ALTHOUGH i NEVER HEARD OF IT. THERE IS ONE FOR SALE ON THE BAY NOW. uNFORTUNATELY I DIDN'T BOOKMARK IT BUT SOMEONE ELSE WILL PROBABLY FIND IT. iIWOULDN'T HAZARD WHAT IT WILL BRING. aT 70 MADE IT'S UNIQUE BUT BY THE VERY SMALL NUMBER MADE IT JUST MIGHT WORK AGAINST THEM AS A COLLECTOR PIECE.
I'M CERTAINLY NOT BIDDING ON IT.
DENNIS

aw nuts the cap key was locked, I'm too lazy to retype it so please excuse my shouting.
Dennis

Bill Gruby · « **Reply #18 on:** February 23, 2007, 12:22:45 PM »

Dennis & Warren;

Yep that OS Max 6mc is a cute little thing it is also bringing a cute price $ 405.00 with plenty of time left. For anyone interested it is Auction # 280085527365. ENJOY?

"Billy G"

Dwayne · « **Reply #19 on:** February 23, 2007, 01:27:36 PM »

Quote from: RandySmith on February 22, 2007, 03:18:52 PM

HI Bill

They are or were differant, first ones out had 4 ports, then they made the CL versions with 3 ports, now they show them as back to 4 ports
Also a few of the ones I got in had a little differance in the mufflers , I think at first they put the OS 35 FP muffler

Regards
Randy
[/quote

Hi Randy
Though I only know you from this forum I hold your opinions in the highest regard, That being said I thought that both the r/c and u/c were introduced with 4 ports then 3. Now they've gone back to 4? (DOH!) Well time to buy up some 3 port versions.
Thanks
Dwayne

RandySmith · « **Reply #20 on:** February 23, 2007, 02:47:52 PM »

Quote from: Dwayne Donnelly on February 23, 2007, 01:27:36 PM

Quote from: RandySmith on February 22, 2007, 03:18:52 PM
HI Bill

They are or were differant, first ones out had 4 ports, then they made the CL versions with 3 ports, now they show them as back to 4 ports
Also a few of the ones I got in had a little differance in the mufflers , I think at first they put the OS 35 FP muffler

Regards
Randy
[/quote

Hi Randy
Though I only know you from this forum I hold your opinions in the highest regard, That being said I thought that both the r/c and u/c were introduced with 4 ports then 3. Now they've gone back to 4? (DOH!) Well time to buy up some 3 port versions.
Thanks
Dwayne

hi Dwayne

That is what the importers are showing now, when you go to order replacement P|S for teh C|L versions they show the 4 port version as the one for teh Control line LA 40 and 46 LAs
Of course this comes as no surprise to me

Randy

Dwayne · « **Reply #21 on:** February 23, 2007, 03:25:33 PM »

Quote from: RandySmith on February 23, 2007, 02:47:52 PM

hi Dwayne

That is what the importers are showing now, when you go to order replacement P|S for teh C|L versions they show the 4 port version as the one for teh Control line LA 40 and 46 LAs
Of course this comes as no surprise to me

Randy

Well this sucks!! We finaly had an inexpensive .40 size engine for stunt and the the thing was OS had no idea they were building an awesome stunt engine. They came up with the 3 port design becouse it was cheaper to make not knowing that by blocking off one of the boost ports they were building one of the greatest bang for your buck Stunt engines ever produced!! Except Maybe the Fox .35, but unlike the Fox .35 The LA .40 needs no special break in just make sure you follow the instuctions use a good fuel I use Omega 10% with about 8 oz. of castor added and it runs just fine. Damn I will miss it!! As I said in a previous post buy up as many 3 port LA's as you can!!! They are DAMN fine engines!!
Dwayne

Warren Leadbeatter · « **Reply #22 on:** February 23, 2007, 03:28:14 PM »

I'm sorry I dont understand, 3 ports 4 port??? Mine have 2 intake and one exhaust. Where could a 4 th be?

RandySmith · « **Reply #23 on:** February 23, 2007, 03:37:08 PM »

Quote from: Warren Leadbeatter on February 23, 2007, 03:28:14 PM

I'm sorry I dont understand, 3 ports 4 port??? Mine have 2 intake and one exhaust. Where could a 4 th be?

Hi Warren

Typical OS engine 1 ex port , 2 main intake ports , 1 boost port, thi s equals 4 ports, the boost port is across from the exhaust port, below is from teh web site about the OS 40 LA-S

This is a direct cut n paste off of the Tower parts site....

NOTES FROM OUR TECH DEPARTMENT
This is a replacement cylinder & piston for the OS .40LA engine.

Features: This is a matched set (cannot purchase the parts individually).

This is an "ABC" cylinder & piston set."A"luminum piston,"B"rass
cylinder liner, with a "C"hrome plating on the cylinder.

The plating is actually Nickel but is still being labled ABC not ABN.

The inside of the liner is tapered so when the piston goes up it gets
tighter. .

"""" This has 4-ports and an alignment notch for proper installation. """""" .

Includes: 1 matched cylinder and piston only, piston pin is NOT is included.

Specifications: Bore: .8346" (21.2mm) Stroke .734"
10-23-97 JBR

Warren Leadbeatter · « **Reply #24 on:** February 23, 2007, 05:34:18 PM »

Thanks Randy I did see that, so what we need for CL is the 3 port version without the Boost Port?

Both my LA46 and LA40 have 3 ports.

Cheers

Bill Little · « **Reply #25 on:** February 23, 2007, 05:54:34 PM »

Quote from: Warren Leadbeatter on February 23, 2007, 05:34:18 PM

Thanks Randy I did see that, so what we need for CL is the 3 port version without the Boost Port?

Both my LA46 and LA40 have 3 ports.

Cheers

What I believe, Warren, is that the 3 port sleeve is the one most desirable for stunt. You got the good ones, I think!

BTW: How's that good looking Nobler coming along?? Have you had a chance to fly it yet?

Bill <><

proparc · « **Reply #26 on:** February 23, 2007, 05:58:12 PM »

We really need to ditch the .018 line requirement for .46's. Enough is enough. Lines will not break if we use .015 on 46's for cryin out loud. .015's for 46's should have been a done deal decades ago. Get with it!!

Warren Leadbeatter · « **Reply #27 on:** February 23, 2007, 08:42:29 PM »

I went flyng this morning Bill!

Flew my Vector with the modifed LA40 and proper fuel ie 22% oil 10% nitro and a 10.5 x 5 Bolly Clubman prop. Flew the pattern in 6m 20s no runaway air temperture was about 29 degrees C. I am much happier with it now.

Also flew the new Nobler. Very nice and smooth... Fox 35 still running in, still a little inconsistent. Runnung 29% caster/synth 9% nitro and a 10x6 TF wood prop. Got half way through the pattern on the 2nd flight and engine cut out at the top of the triangle I had to land inverted, no problem the grass was thick and spongy, so no damage. Looks like it may need a larger tank than the standard or I have another problem. Need to do some more flying with it to work it out. One thing I did notice was the engine was slowing when I removed the battery from the glow plug, so I have put in a cooler plug and that has stopped now. Next few flights will tell me some more. No photos this time, but will get some next time.

Cheers

Clint Ormosen · « **Reply #28 on:** February 23, 2007, 11:24:01 PM »

My LHS has had an 40LA-S on the shelf for a l o n g time. I'll make an offer on it now. How do I tell if it's a 3 port or 4 port? They're not going to let me disassemble it on the counter.

Warren Leadbeatter · « **Reply #29 on:** February 24, 2007, 03:19:56 AM »

Clint, Assuming that this "boost port" is opposite the exhast port you may be able to see it by looking in the exhaust port. My LAS 40 purchased last year doesnt have one and neither does my LA46 which was converted to CL from an RC engine.

Randy, next dumb question, What does a Boost Port do? I assume it's something used in RC engines because you always hear about people blocking them off for conversion to control line. Is it for smoother throttle response or something? I've also read in lots of places (including RC universe) that the LAs never came out with a boost port so this may have been a recent modification???

Edit: You would think if there were two versions there would be two part numbers for the cylinder& piston sets. I can only find one ie OSMG4902 for the 40 and OSMG4903 for the 46.

Cheers

john e. holliday · « **Reply #30 on:** February 24, 2007, 08:04:41 AM »

Quote from: Warren Leadbeatter on February 23, 2007, 08:42:29 PM

I went flyng this morning Bill!

Flew my Vector with the modifed LA40 and proper fuel ie 22% oil 10% nitro and a 10.5 x 5 Bolly Clubman prop. Flew the pattern in 6m 20s no runaway air temperture was about 29 degrees C. I am much happier with it now.

Also flew the new Nobler. Very nice and smooth... Fox 35 still running in, still a little inconsistent. Runnung 29% caster/synth 9% nitro and a 10x6 TF wood prop. Got half way through the pattern on the 2nd flight and engine cut out at the top of the triangle I had to land inverted, no problem the grass was thick and spongy, so no damage. Looks like it may need a larger tank than the standard or I have another problem. Need to do some more flying with it to work it out. One thing I did notice was the engine was slowing when I removed the battery from the glow plug, so I have put in a cooler plug and that has stopped now. Next few flights will tell me some more. No photos this time, but will get some next time.

Cheers

Warren, I thought the experts would jump on this one, but, it sounds like your Fox is not completely broken in. Also if the engine slows down when you remove the battery the plug is not hot enough or not enough nitro. I can fly the complete pattern on 3.75 ounces of fuel. Of course I don't run that much oil either. I seem to get by with 20-22 percent half/half oil. Also 10% nitro. One wintry day when temp was -4C I ran a tank of 30% nitro all synthetic fuel. Engine ran a 4 stroke the whole flight and didn't lean out until last two laps. Sure cleaned a lot of varnish out of it. Still one of my best Fox's. DOC Holliday

RandySmith · « **Reply #31 on:** February 24, 2007, 09:49:08 AM »

Quote from: Warren Leadbeatter on February 23, 2007, 08:42:29 PM

I went flyng this morning Bill!

Flew my Vector with the modifed LA40 and proper fuel ie 22% oil 10% nitro and a 10.5 x 5 Bolly Clubman prop. Flew the pattern in 6m 20s no runaway air temperture was about 29 degrees C. I am much happier with it now.

Also flew the new Nobler. Very nice and smooth... Fox 35 still running in, still a little inconsistent. Runnung 29% caster/synth 9% nitro and a 10x6 TF wood prop. Got half way through the pattern on the 2nd flight and engine cut out at the top of the triangle I had to land inverted, no problem the grass was thick and spongy, so no damage. Looks like it may need a larger tank than the standard or I have another problem. Need to do some more flying with it to work it out. One thing I did notice was the engine was slowing when I removed the battery from the glow plug, so I have put in a cooler plug and that has stopped now. Next few flights will tell me some more. No photos this time, but will get some next time.

Cheers

HI Warren

When you said teh motor slowed after removing the battery and the engine died in flight in the triangle, this needs a hotter plug not a colder one, the cold plugs will not keep the engine lit in flight manouvers and you can get flame outs. My advice is to try a hot plug, this is almost the standard in any 4\2 stunt engine

Regards
Randy

RandySmith · « **Reply #32 on:** February 24, 2007, 09:58:46 AM »

Quote from: Warren Leadbeatter on February 24, 2007, 03:19:56 AM

Clint, Assuming that this "boost port" is opposite the exhast port you may be able to see it by looking in the exhaust port. My LAS 40 purchased last year doesnt have one and neither does my LA46 which was converted to CL from an RC engine.

Randy, next dumb question, What does a Boost Port do? I assume it's something used in RC engines because you always hear about people blocking them off for conversion to control line. Is it for smoother throttle response or something? I've also read in lots of places (including RC universe) that the LAs never came out with a boost port so this may have been a recent modification???

Edit: You would think if there were two versions there would be two part numbers for the cylinder& piston sets. I can only find one ie OSMG4902 for the 40 and OSMG4903 for the 46.

Cheers

HI Warren
this is a direct cut n paste from the Tower parts web site

"""" This has 4-ports and an alignment notch for proper installation. """""" .

Includes: 1 matched cylinder and piston only, piston pin is NOT is included.

Specifications: Bore: .8346" (21.2mm) Stroke .734"
10-23-97 JBR

If they are making a mistake or not we will find out later??? however it maybe a moot point if they have discontinued this series of motors.

as far as what a boost port is , most all model airplane engines that are loop scavenged have 3 intake ports, 2 main and 1 boost.
There are some variations on this as Super Tigre had a few with 2 Port's,
ROSSI and others has some with 5 ports, PA engines have 2 or 3.
Generally speaking ,the loop charged ,boost port engines will produce more power at a higher RPM.
Super Tiger back years ago in the transition period between single by pass motors , and their new loop charged engines , had Perry ports added to boost the power of their single by pass cross scavenged engines.
This was a take off on loop scavenging, and had 4 very small boost ports cut into the sleeve in the front and back of the motor 180 degrees apart. It was claimed to make more HP and several 100 RPMs.
The reason almost every engine maker has gone to Loop porting is it is much better way to charge a cylinder , and also to evacuate the exhaust gasses out of the cylinders. Thus producing much more power.

Regards
Randy

Warren Leadbeatter · « **Reply #33 on:** February 24, 2007, 07:47:49 PM »

Sorry, I always mix hot and cool up for some reason. I did actually put in a HOT plug. Thanks guys.

Warren Leadbeatter · « **Reply #34 on:** February 26, 2007, 04:45:42 AM »

For anyone who is interested that beautiful little OS 6 MC is now up to $1000 USD with 1day 16 hrs to go... CRIKEY!

newell follett · « **Reply #35 on:** March 02, 2007, 03:01:36 PM »

Tower has the OS40LAS C/L in stock $63.99 just check their web site

Bill Little · « **Reply #36 on:** March 02, 2007, 03:20:01 PM »

Quote from: newell follett on March 02, 2007, 03:01:36 PM

Tower has the OS40LAS C/L in stock $63.99 just check their web site

Hi Newell,

Thanks for the heads up!

I might be wrong, but I would guess that there are quite a few left around on the shelves at this time. OS must have made quite a few, so it might be a while before the stock dries up!