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End of an era

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Jon - Laser Engines31/05/2016 16:31:45
5621 forum posts
271 photos

As some of you may know we have at long last decided to discontinue the Laser 150.

The 150 has been extremely popular from the original series 1 engine in released in 1992 right up until the definitive series 7 version produced until last month. Like the earlier 75 the 150 was the size most people directly connected with Laser and it was a bit of an ambassador for us in many respects.

The reason for dropping the 150 was that the extra performance of its bigger brother the 155 has proven even more popular and once our supply of 150 specific parts was depleted we decided it was not cost effective to produce more.

I have been asked what the position is in terms of spares/support for current owners of the 150 and the basic story is that there is no shortage of spares. The only spare in 'short' supply is the crankshaft but we estimate we have about a 10 year supply of cranks given the rate at which we replace them following crashes. All of the other engine components are common to other engine sizes still in production so are readily available and the engines currently being used have a long life ahead of them

150.jpg

 

 

Edited By Jon Harper - Laser Engines on 31/05/2016 16:32:09

Jack Banner31/05/2016 17:04:52
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332 forum posts
43 photos

Thanks for the notification . I have one of these awaiting an airframe, good to know there will be parts for a while.

Former Member31/05/2016 21:26:17

[This posting has been removed]

Manish Chandrayan01/06/2016 04:38:41
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649 forum posts
74 photos

Thanks for the clarity Jon. I have two 150's none of them run yet. The first one was bought direct from Laser while the second was picked up NIB from a Gent in UK.

Reassuring to hear that parts support (if required) would be available for some time

Thank you

Manish Chandrayan01/06/2016 04:41:09
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649 forum posts
74 photos

And now that the old website does not seem to work where do we get the dimensions for the much loved 150? Would it not be a good idea to still have the dimensions available for the discontinued engines?

Jon - Laser Engines01/06/2016 08:21:46
5621 forum posts
271 photos

Hi Manish

I did not bother making a dimension drawing of the 150 as i knew we were going to knock it on the head. If i get some spare time to do battle with the website i could try and make a new page for the discontinued engines but do i only stop at the 150? it could easily take a very large amount of time that i do not have at the moment.

I will look into it again when things ease up but it will be into the autumn before i expect to have any chance.

In the short term, the 120 and 150 are almost identical and only differ in cylinder height. If you take the 120 drawing and just change the cylinder height to 100mm the rest is the same.

Manish Chandrayan01/06/2016 11:07:23
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649 forum posts
74 photos

I understand that John, however I was able to find the critical dimensions for the 150 on this very site (Gordon Whitehead has them in his album).

What I was looking for is how would the 155 compare to the 150 in dimesnions, and if it was a drop in replacement in terms of mounting. Disappointed to find that they are not.

Would it not have been better to have the crank width and mounting holes same as 150 on the 155 ? It would have been an easy thing for people looking to upgrade ?

Edited By Manish Chandrayan on 01/06/2016 11:07:52

Jon - Laser Engines01/06/2016 12:38:41
5621 forum posts
271 photos

When i designed the 155 i originally bored out a 150 crankcase to take the longer stroke and off i went, but when i did the CAD drawing it revealed that i was down to .5mm wall thickness at two points on the crankcase and so i made the crankcase a bit wider to give more thickness at these points. I would have liked the engine to fit the same mount but equally its no good if the crankcase cracks due to the thin wall.

In practice the 155 will drop into a 150 mount. If a 2 piece mount is already in use then the holes for the firewall mounting screws need only be opened up a few mm and this gives more than enough extra room for the 155 to go in. Even if a single piece mount is used this can simply be cut in half and the mounting holes opened up as before. As the holes in the mounting lug are the same as the 150 i can just bolt straight onto the same mount once the other mods have been made.

Former Member02/06/2016 14:48:14

[This posting has been removed]

Scott Edwards 203/06/2016 09:30:06
225 forum posts
97 photos
I have two 150's, one is from the very first prototype batch made in 1991 ! It's currently in its 8th model - an H9 Funtana. It must have had hundreds of hours running, and still goes like a train. Never missed a beat, just oiled and adjusted the tappets and the bloody thing will outlive me
Tim Flyer03/06/2016 14:11:39
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1327 forum posts
239 photos

Looking forward to putting my forthcoming 155 into my Wots Wot XL😊.

funflyerColin03/06/2016 23:11:03
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95 forum posts
99 photos

Hi Jon having just bought a great planes pt19 i discovered that it had a laser 150 up front, was i pleased or what have wanted a laser engine for years i now have one. I first saw your engines back in the 80's wish i had bought one of your smaller engines then, as the Satio 80 that i bought was way too much power for the DB Triphound that i bought it for. I still have the Triphound but sold the satio on.

I gave the laser a once over found the the carb wanted freeing up once that was done primed it and gingerly (not being used to large 4st engines most of mine are 2st ss40s) hooked up the glow, bought prop up to comp them flicked she roared straight into life made me jump. Not to bad on throttle response either but will need tweeking as per your instructions as i think the low end is too lean, but the sound unbelievable very nice.

Glad that you will be keeping spares just in case i my need some, hopefully not.

Colin

Former Member04/06/2016 07:12:42

[This posting has been removed]

Jon - Laser Engines04/06/2016 07:58:30
5621 forum posts
271 photos
Hi Colin. Percy is right, in general the only parts engines need are bearings, piston rings and valve springs. The other parts never wear and unless the engine had an accident they are pretty difficult to damage

Just make sure to use the right fuel and don't overheat it. Then it will last for yonks

Edited By Jon Harper - Laser Engines on 04/06/2016 07:59:29

funflyerColin04/06/2016 12:54:42
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95 forum posts
99 photos

Thanks guy's, Jon i did buy some laser fuel for it as recommended by my LMS Inwoods Model Tenknics laser 5.

The PT 19 by the way is 82 1/2" wingspan how old the the aircraft and engine is i do not know but am giving them both a good going over will be tuning the laser up and running it several times before committing to the air just to get the feel of it, i'm rather apprehensive about these big props.

Thanks Colin

Artto Ilmanen04/06/2016 13:14:27
105 forum posts
8 photos

I wish there were videos on the new 155 on youtube but I haven't seen any..

Artto Ilmanen04/06/2016 13:22:48
105 forum posts
8 photos

My GP Super Chipmunk with Laser 150 is ready for maiden. I wish I had time to go flying but I need to wait for some time as busy times at work sad

I will first try 16x8 Apc and then I may try 17x6 Apc, too. I also have some 17x7 wooden prop but I wonder if that's too much for Laser 150

Jon - Laser Engines04/06/2016 22:55:39
5621 forum posts
271 photos
Colin, don't be afraid of any of our engines. Even the big 360v is a non event to start and run. I am far more frightened going within 100ft of a saito 180 as they can be quite aggressive. Our engines are intended to be easy to start and use so don't be worried.

Artto, those props sound fine but you might want to try 16x10 on the super chipmunk. It wouldn't be my choice, but others flying similar models say it works well. And I will get a 155 video up for you when I can
Former Member05/06/2016 08:16:07

[This posting has been removed]

Artto Ilmanen05/06/2016 08:38:24
105 forum posts
8 photos
Posted by Jon Harper - Laser Engines on 04/06/2016 22:55:39:
Colin, don't be afraid of any of our engines. Even the big 360v is a non event to start and run. I am far more frightened going within 100ft of a saito 180 as they can be quite aggressive. Our engines are intended to be easy to start and use so don't be worried.

Artto, those props sound fine but you might want to try 16x10 on the super chipmunk. It wouldn't be my choice, but others flying similar models say it works well. And I will get a 155 video up for you when I can

thanks for the hint and yes, a video on Laser 155 would be nice! I don"t know what quantities the 155 is selling but I hope some folks post videos on their 155s in actual flying models on youtube

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