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Laser Engines - Technical questions

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Andy Shailer04/01/2019 21:59:57
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358 forum posts
374 photos
Brilliant, Big thank you Jon, 120 going in sig 1/4 Spacewalker and hopefully the 150 powerful enough for precedent 1/3 Druine Turbulent, many thanks for info Jon.
Regards
Andy.

Edited By Andy Shailer on 04/01/2019 22:00:21

Jon - Laser Engines05/01/2019 09:34:30
4609 forum posts
172 photos

The 120 will be fine in the spacewalker as long as its not too heavy.

The seagull artf version is very light and will be fine with the 120. The SIG kit built version on the other hand is heavier and will be better with the 150. Also remember that our 120 is a short stroke engine and it likes to rev a bit more than our other engines do. On something like a 15x8 expect low-mid 8000's depending on the prop/fuel combo. Dont be tempted to load the engine with a prop that runs it at less than about 8000rpm on the ground. It just wont like it.

The Turbulent is a similar story as the 150 will fly it fine but we often recommend the 180 as a bigger prop can be used and you have a margin of spare power should you get into trouble. The 150 can be loaded as low as 7500rpm without too much distress and the 180 is ok down to about 6500. This would be on 18x6 and 20x6 props respectively

The Hobbit05/01/2019 16:56:08
4 forum posts

I would like to put a Laser in a Black Horse Sea Fury .I have a Laser 80 and a Laser 180 .I think the Laser 80 will not power the Black Horse 20cc Sea Fury so was thinking on the Sea Fury 45 but will the Laser 80 be to much for the Sea Fury 45 and not powerful enough for the Sea Fury 20cc On to the Laser 180 will this power the bigger Black Horse Sea Fury 30cc .My question is would the Laser 80 power the Sea Fury 20cc size or would I be better using the Laser 180 in the bigger Sea Fury or am I doomed to none of the Sea Fury being suitably for the Black Horse Sea Fury ??

The Hobbit05/01/2019 17:05:12
4 forum posts

My dad use to fly the Sea Fury many years a go ,So I would like to have a Black Horse Sea Fury .I have a Laser 80 and a Laser 180 but I am not sure which Sea Fury would be the best combination .The Laser 80 I think would not have enough power for the Sea Fury 20cc and would be overpowering the Sea Fury 45 . Now would the Laser 180 be enough to power the bigger 30cc Black Horse Sea Fury or not .I am doomed and will I have to buy a different engine say a Laser 120 for the 20cc Sea Fury ?

Jon - Laser Engines05/01/2019 17:07:23
4609 forum posts
172 photos

I have been asked about 1000 times what type of remote glow lead i recommend for our engines as the normal rubber boot type dont fit the smaller engines that well.

So, the type i now recommend are these jobbies (link below) and they are readily available. Intended for cars, but one of my intrepid customers took a punt and fitted a pair to his 200v so that he didnt have to chop the cowling about. He assures me they work, so blame him if it all goes wrong

**LINK**

Manish Chandrayan05/01/2019 17:18:02
560 forum posts
65 photos
My personal preference for connector is the type that uses brass cylinders with a tiny ball and spring. These are much secure and less prone to failure compared to the spring loaded plunger ones with a rubber boot where over time the contacts become dodgy as spring looses it's tension due to being compressed over time and being heated. The only downside being that these could be used only on OS type plus

Edited By Manish Chandrayan on 05/01/2019 17:19:06

Edited By Manish Chandrayan on 05/01/2019 17:38:40

The Hobbit05/01/2019 17:20:25
4 forum posts

Due to fact my father use to fly the Sea Fury many years ago ,I would like to have a Sea Fury .Black Horse do 3 different size Sea Fury .I have 2 Laser engines but not sure if they will be OK .I have a Laser 80 and looking at the specs for the 20cc Sea Fury but think this might be to much for the Laser 80 and then they do a Sea Fury 45 but then again I think the Laser 80 might be to much for the Sea Fury 45 .My next hope is the Laser 180 would this power the bigger Black Horse 30cc Sea Fury ? Or am I going to have to buy a 120 for the Sea Fury 20cc or a 30cc petrol engine for the 30cc Sea Fury ???

tigerman05/01/2019 17:23:31
159 forum posts

Due to the fact my father use to fly Sea Fury many years ago .I would like to add a Sea Fury to my collection of models .Black Horse do 3 different size Sea Fury a 45 a 20cc and a 30cc .I have 2 Laser to try a fit into 1 of these Sea Fury a Laser 80 and a Laser 180 now I think the Laser 80 will be to much for the 45 size and not powerful enough for the 20cc Sea Fury which leaves the Laser 180 .Will the Laser 180 be powerful enough for the 30cc Sea Fury if the Laser 80 will not suit .Or will I be better buying either a 120 for say the 20cc Sea Fury or a 30cc petrol engine to power the 30cc .( Not a great lover of petrol engines )

Edited By tigerman on 05/01/2019 17:34:54

Jon - Laser Engines05/01/2019 18:42:45
4609 forum posts
172 photos

At 11lbs and 66 inches the 80 would not really be man enough for the 20cc. The 100 or 120 would be better in this instance.

At 76 inch and (allegedly) 15 lbs the 180 would be more than man enough for the 30cc flavour and i think it would be a good match. Looking at the manual it should be possible to fit the engine inverted with the tank on the fuselage floor. This is assuming the engine is not too tall as i have a 360v (same height cylinder as 180) in my 80'' fury and there is not much spare room between the rocker cover and the cowl. If you can get a dimension on the cowl that would be handy.

In any event the 30cc version is the one i would put my money on. I would aim for a flying weight of around 17lbs and go from there. The kit wheels look a bit small and i would suggest making whatever changes you need to allow the use of larger/more scale wheels. Not only will it look better but it will help keep its face out of the dirt if the grass is a bit long.

Malcolm Holt05/01/2019 18:46:31
87 forum posts
2 photos

Andy, FWIW I have a 150 in my SIG 1/4 Spacewalker and the power feels about right. That said, being somewhat long in the tooth, mine is covered in nylon and then painted so is probably a bit on the heavy side.

08.jpg

02.jpg

tigerman05/01/2019 18:53:11
159 forum posts

That is good news I was hoping the Laser 180 would power the 30cc Sea Fury this was my first choice ,I thought the Laser 80 might struggle with the 20cc size .I will go for the 30cc Sea Fury now I know it will power it OK .They are out of stock at the moment but there is a shipment of Black Horse kits( hopefully they will include the Sea Fury ) due in December (which normally means they should be here in the spring ) Thanks Jon

Jon - Laser Engines05/01/2019 19:02:18
4609 forum posts
172 photos

No worries. Its a nice looking model but good grief its not cheap. My YT example was similar money and is decidedly beefier.

Not that it matters i suppose, things cost what they cost at the end of the day.

Malcolm, lovely model thumbs up

The Hobbit05/01/2019 20:45:55
4 forum posts

Ops!!! If you are wondering why my post is exactly the same has "tigerman ".It is because I am new to this forum and I did not realise when you first post stuff on the thread it is vetted first ( I have no problem with that ,makes sense ) .I thought it had not been posted so I rang my brother and he put it on his thread for me Sorry but I did get my question sorted out thanks Jon I will be ordering the Black Horse 30cc for my Laser 180 has soon as Black Horse has them back in stock

Andy Shailer06/01/2019 21:46:58
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358 forum posts
374 photos
Thank you Jon, maybe l will put the 150 in the spacewalker.

Malcolm thank you for pictures it looks great, do you know all up weight of your spacewalker,
Andy.
John Stainforth06/01/2019 23:53:41
290 forum posts
38 photos

Er, Jon...

(clears throat)

... when are Laser V twins going to be back in production?

Jon - Laser Engines07/01/2019 08:32:58
4609 forum posts
172 photos
Posted by John Stainforth on 06/01/2019 23:53:41:

Er, Jon...

(clears throat)

... when are Laser V twins going to be back in production?

Sadly they are out of production until further notice.

Edited By Jon - Laser Engines on 07/01/2019 08:33:57

John Stainforth07/01/2019 09:05:17
290 forum posts
38 photos

Jon thanks for the info. I eagerly await such notice in the fullness of time.

Chris Walby07/01/2019 11:24:46
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913 forum posts
220 photos

John S, I really shouldn't ask due to the current back log on the building board, but do you have a model in mind for Laser V?

Feel free not to answer as it might cause harm to others wallets wink

Malcolm Holt07/01/2019 11:45:49
87 forum posts
2 photos

Andy, the Spacewalker is 5.9 kilos (approx. 13 lbs).

John Stainforth07/01/2019 17:29:03
290 forum posts
38 photos

Chris, not yet, but I might just stockpile these for posterity and to counter the leccy revolution. Only (half) joking!

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