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Member postings for Jon Harper - Laser Engines

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

Thread: P.A.W. 1.49 plain bearing - can't adjust compression
16/12/2017 19:04:04

As with all things there is a learning curve, I'm sure it will come good

Thread: Laser Engines - Technical questions
16/12/2017 18:11:48
Posted by bert baker on 16/12/2017 17:57:01:

I agree with you John,

My 45cc Blackhorse Chippy flys very well on a G 38. And I here of plenty on DLE 30s

But one was being flown on a Laser 150

The 45cc chippy will fly on a 120! its way over powered with a 45cc. a decent 150-180 4 stroke would be my recommendation

Thread: P.A.W. 1.49 plain bearing - can't adjust compression
16/12/2017 18:10:30

that all sounds quite strange. in general I keep increasing the compression until it knocks, then slacken it off to allow the revs to come up, then a little leaner, twiddle compression...once set though its really stable .

16/12/2017 17:51:39

I'm with Steve, pop an 8x4 on it and it will be far happier. Mine runs well on an 8x4 master.

How long did it run for iin the state you filmed? I ask as it almost sounds like its just bouncing back and fourth between compression and not going all the way around.

On a 7x5 it should have revved like mad, and adjusting the compression up/down should not have caused it to stop immediately.

Thread: Laser Engines - Technical questions
16/12/2017 17:47:56
Posted by Rocker on 16/12/2017 16:47:02:

So would I be right in saying that all the warbirds that require a 35cc petrol engine a Laser 180 would be the four stroke equivalent and the Laser 180 would be OK to fly them ?

Not exactly. Most kit recommendations should be taken with a pinch of salt as often they list engines that are too large to prevent people complaining the model is not fast enough. Equally though, some models need more power than the mfr states due to an inaccurate weight or some other issue.

My La7 for example used to fly on a 180, it was fine, but its waay better with the 300. Sure the 300 is now too much for scale, but its good fun and makes the model a great deal better.

The Hurricane is lighter, and the full size was not in the same league as something like the la7 so the 180 is likely to be just fine. I flew an 80 inch 14lb mick reeves hurricane on our 120 without any trouble so the seagull version at 16 or 17 lbs will be no problem.

Thread: P.A.W. 1.49 plain bearing - can't adjust compression
16/12/2017 16:43:04

Good you got it going tom but its not exactly zipping along. What prop are you throwing? Did you adjust the compression at all once it was going?

Thread: Laser Engines - Technical questions
16/12/2017 15:13:04

Rocker I'm not sure which warbird you are looking at as a stepping stone but Tim Harris of the North London club is looking at the Seagull Hurricane with our 180 in the nose as it will need very few mods. Its likely to be quite forgiving as a model too so might make a good choice for you.

Production wise I'm close, but I'm not sure if I will make it before the deadline which is going to be Tuesday morning. I will do all I can.

Bert, yeaa that would do it!

Thread: Precedent Stampe 1/4 Scale
16/12/2017 15:08:57

works for me yes

Thread: Powered by Laser, a gallery thread
16/12/2017 10:58:23

yea supply has been pants. once we finally move to our new factory I'm really hoping things will improve.

16/12/2017 10:05:27

I didn't know yt did a 70 inch job in that paint scheme. I am tempted by their larger one in the same colours.

Your tank setup is quite clever as it prevents the head pressure of the top tank acting on the lower. If it didn't do this it wouldn't work

The spit looks awesome btw

Edited By Jon Harper - Laser Engines on 16/12/2017 10:05:51

Thread: Precedent Stampe 1/4 Scale
16/12/2017 10:02:54

should be easy enough to find 6 I would think. even if a tiger moth snuck in to make up the number

Thread: Laser Engines - Technical questions
16/12/2017 10:02:11
Posted by Ron Gray on 16/12/2017 09:51:08:

@Rocker. Re the WWXL, if you at the specific thread for this ‘plane you will see how I fitted the tank in mine to feed the 160v. Basically I cut out a ‘slot’ in the provided tank platform and droppped my tank through that so it sits on the fuse on a bit of foam. I then have a ply bar that goes across the top of the tank which clamps it in place. Seems to work ok for me. Bit of a faff cutting out the slot but can be done with a bit of care and a saw blade attachment on my modelling knife.

the 180 is likely to be too tall for this to work as the carb will be lower than the fuselage floor I think. I don't have the measurements so cant be 100% sure. mounting sidewider is a simple fix

Thread: Precedent Stampe 1/4 Scale
16/12/2017 09:47:15

Are we talking about old warden or wings and wheels?

Thread: Powered by Laser, a gallery thread
16/12/2017 09:45:54

goodness Steve, you need a thread just for yourself! I didn't realise I had fleeced your wallet so many times

Which kit is the Gunfighter P51 from? is it a yt job?

Tom, I have fond memories of the flair pup as I was taught to fly on my dads example. He still has it and its more or less still airworthy. He has flown only once or twice in the past 10 years though

Thread: Laser Engines - Technical questions
16/12/2017 09:40:26
Posted by bert baker on 15/12/2017 22:33:47:

img_1772.jpgHi it has J11 0n engine lug as well as my initials

The carb is broken it is a 150 do you still stock this carb

That carb is quite poorly. What on earth happened to it? it looks like the spray bar has been rotated about 90 degrees. the engine isn't going to appreciate that at all!

I can supply a new carb or we can rebuild that one.

Joe, the cowl on the mig really is a bucket, I'm kicking myself that I didn't buy one when I had the chance.

Rocker, the simple answer is to cut a hole and move the tank. If something is in the way, cut it out. This does over simplify a touch, as something like the WWXL will not allow this as the fuselage is not deep enough but most warbirds are chunky enough to take it. On my small hurricane I modified the wing leading edge quite a bit to allow the tank to sit where it needed to. It works well and the engine is quite happy.

dsc_0104.jpg

dsc_0105.jpg

dsc_0106.jpg

One of the advantages of building from a kit is that you can make these changes. I do accept though that sometimes there is some head scratching involved.

Thread: Geoff's DB DH60 Moth
15/12/2017 23:27:38

yea we don't do a 50 any more. You would have to use something else, and there are many 50 size engines available. as for the stock, I'm trying :'(

Thread: Powered by Laser, a gallery thread
15/12/2017 22:51:16
Posted by Ron Gray on 15/12/2017 22:46:00:

No good talking about it Jon, this is after all a gallery thread, get some pics! 😁

yes boss

Thread: P.A.W. 1.49 plain bearing - can't adjust compression
15/12/2017 22:48:42

I don't want to drag this thread off track Tom, I will pm you.

15/12/2017 22:27:24

My DC sabres, AM10 and PAW 149 and 249 do not have locking levers. My PAW 60 (currently poorly) did have one though but I don't know if its stock.

On the Laser 4 stroke diesels we needed a lock screw but they are a bit of a different animal.

Thread: Geoff's DB DH60 Moth
15/12/2017 22:24:33

No 4 stroke Geoff? I'm sure a nice 50 size would be more than enough, even a 40 would probably do.

Nice model though either way, and one I have my eye on.

Edited By Jon Harper - Laser Engines on 15/12/2017 22:24:58

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