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Member postings for Jon - Laser Engines

Here is a list of all the postings Jon - Laser Engines has made in our forums. Click on a thread name to jump to the thread.

Thread: Laser Engines development.
08/07/2020 07:50:49

Cheers David i will add you to the list

Thread: Need some help please
07/07/2020 14:27:51

I echo the comments of the other guys here.

If your father had a friend or club mate he used to fly with they could help with trying to sort it all out. However, as the guys point out some will try and use the opportunity to keep the best toys for themselves so be careful if its an unknown person who jumps up to offer advice.

Depending on where you are there might be a forum member nearby who could help. Im sure the guys on here are all decent enough to advise you honestly.

If you upload photos you might also be able to move some of the items on to forum members and not have to pay the ebay fees.

Thread: Laser Engines development.
07/07/2020 14:22:35

I checked with MT and the Laser 5 Pro name is a place holder of sorts, but in truth i kinda like it.

If you compare it to a normal bottle of laser 5 is should be quite a pale colour by comparison.

07/07/2020 13:37:10
Posted by David P Williams on 07/07/2020 13:13:26:

I'd be happy to fly the WWXL without a cowl, unless you want to check cooling etc on a cowled engine. I'm glow only at the moment, so if it was the 180 petrol I'd have to run it on Aspen cos of the stink.

Cooling is an important factor so we do need to test that. If the engine only works when dangling in the breeze its not much use in a scale model for example. The cowl only needs to be simple. Some balsa sheets formed to make some sort of a cowl, a layer of glass if you want and a bit of paint. Nothing crazy.

Bruce, i dont want to get too far down the rabbit hole on this thread but to be honest i think OS would be fine, saito mayb not. OS use a bronze big end bush like we do so would probably be ok. However, their crank material is different, which grade of bronze is it they use....etc. I cant make any promises so wont even try.

Thread: thanks to lockin it got going what is it
07/07/2020 12:50:05
Posted by flight1 on 07/07/2020 12:26:42:
Posted by Jon - Laser Engines on 07/07/2020 08:05:45:

How big is it?

The clue is 1/5 scale mercury 9 cylinder engine requiredwink

Oh yea, read more, comment less

Anyway, needs a laser 360 i reckon. Cant help you with petrol though at this point

Thread: Laser Engines development.
07/07/2020 12:47:42

Chris, i didnt know it was on sale in the shops. Are you sure they didnt ship normal laser 5 as this stuff is only available from MT direct as far as i know. If it is the real stuff (laser 5 diet?) they best not sell it to anyone for other engines as they might die.

Robin, the gearbox idea is in the 'thinking out loud stage'. I will worry about the technical aspects later.

Martin, one thing at a time! Right now i have 5 engines to develop and test plus a gearbox to investigate.

David, WWXL is a good test bed. A 180 petrol would do it as would my 'new' 30cc multi on glow. The petrol would need the least number of mods as the 30cc would need you to make a new cowl. That said, the more cylinders the more fun right? Take your pick

Thread: thanks to lockin it got going what is it
07/07/2020 08:05:45

How big is it?

06/07/2020 22:24:51

Fokker D.XXI?

Thread: Precedent Stampe 1/4 Scale
06/07/2020 22:21:00
Posted by Geoff Gardiner on 06/07/2020 22:07:26:

Are they the same Oleos that Nick used - 169mm HobbyKing jobbies?

errr...they are silver..

I have a spare set somewhere, i will dig them out and try and find some more useful information

Thread: Laser Engines development.
06/07/2020 22:18:19

Thanks for all the input.

Gearboxes are something i am keen on and clearly its of interest. However, if it was available as a bolt on accessory for what, 100 quid? would you actually buy one? I cant say for sure if that is how much it would be, but its not likely to be less.

On the testing side I have had a few PM's and wanted to clarify something about the test vehicles.

Whatever model you have in mind as a test bench dont worry too much about how well the engine will fit. The point here is to fly, fly, and fly some more. Richards wot4 extreme, wot4 x, acrowot xl etc are all perfect test benches but each will need a new cowl made to suit. Just bolt the thing on mad max style and roll with it. I dont care what they look like, they just need to fly. Once testing is over and the engine proven, then its time to fit it into that scale model and make it all look perfect.

Richard w2, drop me a line with your email or call me tomorrow

Vince, no radials at this time im afraid but if this little lot works out i will push for them as my 90cc 3 pot design is more or less done. A quick look at the yak tells me it needs a 300/360 but if its ok could we shift that conversation to another venue as i dont want to get off track here.

Alan, give me a call/email as well. I can fill you in as i might have the perfect thing for the tiger.

Also i dont want to over promise but a conversation with the boss today has me both in shock and actually excited about potential future prospects for the first time in many years. Fingers crossed i can start to offer more as time moves on.

Thread: Air up/down retracts max system pressure
06/07/2020 21:41:13

i use 80-100psi myself but i think most systems can handle 120

Thread: Precedent Stampe 1/4 Scale
06/07/2020 21:39:33



I need to take a photo of my baffles. Apparently i dont have one!

Thread: Aspen fuel
06/07/2020 21:36:08
Posted by Richard Clark 2 on 06/07/2020 20:31:49:

It's crazy expensive.

Remember half the price of 'road vehicle' petrol from a petrol station is the duty and the VAT on that duty.

Aspen isn't sold as a 'road vehicle' fuel so there's no duty and therefore no VAT on the duty.

And basically it's just 'low sulphur' petrol with almost no additives so it's no big deal.

A total ripoff.

You might want to do a little more research as there is quite a bit more too it than that.

After several years of running the piston crown on my 180 petrol prototype is still almost completely clean. I have even used aspen in my lawn mower and the piston is cleaner now than it was a year ago when i made the switch.

With the low odour and other advantages its a no brainer in my eyes.

06/07/2020 16:17:43

I have used it in all the Laser petrol development. Works a treat, the oil is excellent, and it would always get my vote over normal stinky petrol.

Thread: Air up/down retracts max system pressure
06/07/2020 16:16:28

No, it likely needs 35 pounds to open the valve and that is what the pump was reading.

What sort of valve do you have? and what pump? If its a cheap electric thing the gauges are hopeless.

Thread: Laser Engines development.
06/07/2020 15:35:51
Posted by Doug Campbell on 06/07/2020 14:03:44:

None of those. A return to smaller engines please

This has been done to death on the other threads and is not the topic of discussion here

06/07/2020 15:28:37
Posted by John Stainforth on 06/07/2020 14:26:18:


Sounds like a great idea, because my standard off-the-shelf model engines seem to be borderline re the 82 db limit. But, I would need to know a little bit more before committing, e.g.

- Roughly what would be the weight increase?

- If the reduction drive is to be offset from the crankshaft, by roughly how much?

- What proportion of the power would you expect to lose in the drive? (This one not so important.)

Weight increase, dont know until i build one. This is just an idea at the moment.

Power loss, see above as i have never tested one but a few bearings and a gear is not likely to suck much power away.

Offset, yes it will be offset on singles for 2 reasons. First, the whole thing is more cost effective with as many common components used as possible. As such the drive will be 45 degrees off centre to suit the V twins where the drive would then sit between the cylinders. On a single, this will mean its off centre like the old Webra used to be. Its not all bad news though as this allows cooling air to the cylinder which would otherwise be obstructed and this is the 2nd reason why i am happy with the offset design.

Frank, can you message me with your email address. Im going to start a new list of people who want stuff as my old ones are so out of date it just not worth it.

06/07/2020 13:17:58

I was going to revive the old thread we had on this topic but it was suggested by the mods i start here we are.

Firstly, i want to know how many people would be interested in a reduction drive for our engines. The idea would be to drop propeller RPM to a much lower level to reduce noise. Props make a great deal of noise and a larger prop at lower RPM is much quieter and more efficient. If these were available would you want to retrofit one? What sort of price would be reasonable?

As a guide, the smallest engine i would attempt to convert would be a laser 100. Using this as a base line, you would exchange (in theory, i gotta test it!) 15x8 @ 8000rpm for a 20x14 @ 4500rpm. Fitted in a scale model this would also look great, and perhaps allow the use of 3 blade props in a warbird. These could be made available for a whole bunch of engines and would be well suited to our twins. If you would actually buy one, please post your comments below.

Part 2, Many of you will know there are a number of things i am working on in the background and i am making some headway. Our new fuel is being tested by a number of guys with positive results and there is also a move to get 180 petrol development back on track as well as the potential for some new glow engine designs.

What this means is i am going to need people to give me a hand testing new engines.

The exact format is yet to be worked out but we are going to have to have some sort of system in place to prevent the same problem i had the last time i sent engines out for testing where only 3 of 10 people actually used their engines. Its a real shame, but the whole thing is pointless if i get no feedback.

In essence, when the time comes the engines need to be fitted and in the air immediately. No asking for one for a project that is a year away and no wanting one just to be the first to get one and stick it on the mantle piece as its likely there will be only a few of each available. I need them fitted and flown within a week and the engine may become available at very short notice. If that is not for you please dont ask for one.

Also note that these will all be prototypes and not production spec. The engines may be a bit rough and ready and while i will do my own testing ahead of time they might need parts changed or updated as we work through the testing. They might have to come back to the factory if things to wrong and the model might be grounded as a result. There is also a chance the engine might stop so i wouldnt recommend fitting them to a model you spent a decade building. If you are not prepared to accept potential inconvenience of this nature, please dont ask for an engine.

So with all that in mind i need a show of hands for those willing to test one or more of the following:

Petrol 30cc
Glow Multi cylinder 25-30cc
Glow Multi Cylinder 50-60cc

Take your pick and let me know.

Thread: Diesel anybody?
06/07/2020 08:06:50

I am keen to build a little 2 channel diesel model. Its been ages since i had one and i do quite fancy it.

As i have numerous diesel engines to hand the hard part is working out which one to use!

Thread: Laser Engines - Technical questions
03/07/2020 19:07:13
Posted by Frank Skilbeck on 03/07/2020 17:21:45:

Sorry if this has been asked before, but what's the thread in the outlet of a Laser 150 exhaust. Thanks.


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