Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


Laser 70 4 stroke Cox_ba12




Laser 70 4 stroke Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
July-2021
Kim's

"Rusty's RR-1 runs up on the Q-Tee on a beautiful Summer S.M.A.L.L. Day."




PAST WINNERS
CEF Traveling Engine

Win This Engine!
Forum Store
CEF Ear Savers
Gallery


Laser 70 4 stroke Empty

Laser 70 4 stroke

Go down

Laser 70 4 stroke Empty Laser 70 4 stroke

Post  ian1954 Tue Apr 28, 2020 3:07 pm

Tis a strange phenomenon but where I fly, two stroke glo motors are prone to rouse complaint.

Strange thing is that unsilenced diesels up to 19s don't seem to upset anyone and even larger silenced models seem to stay in everyones comfort range.

Unsilenced glo motors are a no no - might get away with a Pee Wee for a couple of minutes but everything else raises eyebrows.

Quite a few silenced glo motors also breach the bounds. The Brodak 40 is one of these, the OS 40 and 46 with the large silencer scrape through ........... the list goes on and on and is very subjective.

My main problem though is not so much the noise but the bulky silencer. While it is nice for streaming the exhaust away - it is also good at destroying an engine in a prang. I have many engines in my junk box with broken exhaust ports and mounting lugs. (not broken by me but scooped up from someone elses wreckage)

Not that I don't prang - nearly all my engines are unsilenced  diesels and pretty tough. (i have written off quite a few electrickeries though!)

Anyway, where I am, quite a few modellers have gone and been four stroke for some time. They have a much mellower sound with quite a small silencer tucked at the back. Up til now, I have never owned one but have repaired a few (mostly because the owner, like me, is a fan of castor oil - believe me, one of these doesn't take to kindly to being gummed up.

Anyway, my first real foray is this Laser 70.

DISPLACEMENT
0.70 cu in (11.33cc)
BORE
27.7mm
STROKE
18.8mm
PRACTICAL RPM RANGE
2000-11000
RECOMMENDED FULL POWER RPM RANGE
9000-10500
RECOMMENDED PROPS
12×7-8 13×6-7 14×4-5
WEIGHT
580g

It is a heavy little beast.

Laser 70 4 stroke Laser_10

Even with the collection of glo plugs I have - I don't have a suitable one for this. This needs OS type F or equivalent. I also need some no castor oil fuel.

Impatiently waiting delivery!
ian1954
ian1954
Diamond Member
Diamond Member

Posts : 2682
Join date : 2011-11-16
Age : 66
Location : England

Back to top Go down

Laser 70 4 stroke Empty Re: Laser 70 4 stroke

Post  Jason_WI Tue Apr 28, 2020 3:16 pm

I have a laser 100. Its a heavy engine. I haven't run it yet. Got it used off of RC Groups a while ago.

Still drooling for a 240 V twin. Some day.
Jason_WI
Jason_WI
Top Poster
Top Poster

2019 Supporter

2020 Supporter

Posts : 3089
Join date : 2011-10-09
Age : 46
Location : Neenah, WI

Back to top Go down

Laser 70 4 stroke Empty Re: Laser 70 4 stroke

Post  ian1954 Tue Apr 28, 2020 3:48 pm

@Jason_WI wrote:I have a laser 100. Its a heavy engine. I haven't run it yet. Got it used off of RC Groups a while ago.

Still drooling for a 240 V twin. Some day.

The 100 weighs in at almost 29 ounces. I am afraid the 240 Vtwin is no longer in production.

Now the 200V which is 43 ounces and the 360V - 67 ounces. These aren't engines to drop on your toes.
ian1954
ian1954
Diamond Member
Diamond Member

Posts : 2682
Join date : 2011-11-16
Age : 66
Location : England

Back to top Go down

Laser 70 4 stroke Empty Re: Laser 70 4 stroke

Post  OhBee Tue Apr 28, 2020 5:15 pm

Everybodys a whiner nowadays...but it's OK we have to listen to thier screaming kids and barking dogs all day. And lawnmowers at 7:00 AM Sunday morning!
OhBee
OhBee
Platinum Member
Platinum Member

Posts : 694
Join date : 2016-03-23
Age : 70
Location : Minnesota

Back to top Go down

Laser 70 4 stroke Empty Re: Laser 70 4 stroke

Post  getback Wed Apr 29, 2020 9:08 am

What's the origin ? It look heavy
getback
getback
Top Poster
Top Poster

2019 Supporter

2020 Supporter

Posts : 7988
Join date : 2013-01-18
Age : 63
Location : julian , NC

Back to top Go down

Laser 70 4 stroke Empty Re: Laser 70 4 stroke

Post  ian1954 Wed Apr 29, 2020 4:00 pm

@getback wrote:What's the origin ? It look heavy

England

http://www.laserengines.com/
ian1954
ian1954
Diamond Member
Diamond Member

Posts : 2682
Join date : 2011-11-16
Age : 66
Location : England

Back to top Go down

Laser 70 4 stroke Empty Re: Laser 70 4 stroke

Post  getback Wed Apr 29, 2020 4:04 pm

OK Thanks Very Happy
getback
getback
Top Poster
Top Poster

2019 Supporter

2020 Supporter

Posts : 7988
Join date : 2013-01-18
Age : 63
Location : julian , NC

Back to top Go down

Laser 70 4 stroke Empty Re: Laser 70 4 stroke

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum