Go Back  RCU Forums > RC Airplanes > Beginners
Reload this Page >

GMS Engine??

Notices
Beginners Beginners in RC start here for help.

GMS Engine??

Old 09-19-2007, 04:43 PM
  #1  
nk1851
Thread Starter
My Feedback: (33)
 
Join Date: Aug 2005
Location: Sachse, TX
Posts: 122
Likes: 0
Received 0 Likes on 0 Posts
Default GMS Engine??

Are these engines any good? They are priced well.
Thanks
Old 09-19-2007, 04:47 PM
  #2  
chopper man
Senior Member
 
chopper man's Avatar
 
Join Date: Feb 2004
Location: Pooler, GA
Posts: 801
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

Had one and lost it on the second flight of the day. I didn't have it long enough to have a good or bad experience. I did notice that after doing the breakin procedure at home and then going out to fly the next day it was very hard to get a low idle. Some of the guys at the field said that it takes a few tanks of fuel before they will idle very well. Just my short experience.
chopper man
Old 09-19-2007, 06:21 PM
  #3  
mv-warbird
Senior Member
 
Join Date: Mar 2006
Location: clinton, NJ
Posts: 127
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

i have had a gms 61 and now have a gms 76.
for the money you cant beat the horsepower you get out of these engines.
its all in the break in. this engine is not very reliable untill its broken in.
and i mean about a gallon of fuel.

also the low end needle on mine was way off.and very senitive.
they also run better with the stock muff too.
once you get past the breakin you ll have a cheap power house that ll swing a 15 in prop no prob.
Old 09-19-2007, 06:40 PM
  #4  
Ugo Ferrari
Senior Member
My Feedback: (1)
 
Ugo Ferrari 's Avatar
 
Join Date: Jan 2002
Location: Ft.Walton Bch.|, FL
Posts: 439
Likes: 0
Received 1 Like on 1 Post
Default RE: GMS Engine??

All I can say is that I have six (6) of them in various sizes and love them all ! I am currently breaking in my third GMS.47 for my new Decathlon! MUCHO POWER !

Ugo
Old 09-19-2007, 09:50 PM
  #5  
AllTheGoodNamesAreTaken
My Feedback: (180)
 
AllTheGoodNamesAreTaken's Avatar
 
Join Date: Aug 2002
Location: Somewhere In, NC
Posts: 1,578
Likes: 0
Received 1 Like on 1 Post
Default RE: GMS Engine??

I only own the .40, but it absolutely screams. Easy to start, and nice reliable idle-once broken in. It spins a MA 10/6 at well over 15K on PowerMaster 10/22 fuel.
Best of all they are DIRT CHEAP. Wait for a $20 off $50 coupon from Tower and you have a $40 engine that is hard to beat.
Old 09-20-2007, 02:41 AM
  #6  
bigedmustafa
My Feedback: (2)
 
bigedmustafa's Avatar
 
Join Date: Jun 2005
Location: Omaha, NE
Posts: 4,109
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

I own engines from O.S., Saito, Thunder Tiger, Super Tiger, Magnum, and GMS. My GMS .47 took a little longer to break in than my other ABC 2-strokes, but was very reliable, powerful, and smooth-transitioning. I would buy another GMS based on my experiences so far.
Old 09-20-2007, 04:07 AM
  #7  
grimmy55
Senior Member
 
Join Date: Jul 2006
Location: Rangiora/Kaiapoi, NEW ZEALAND
Posts: 263
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

at around a $100 US G M S 60 the best buy I,ve had for a long time nosed trainer in at full throttle one flick and it was away again and it idles real sweet the secret is the break in I feel, would highly recommend to any and everyone and they look nice with that gold anodized head
Old 09-20-2007, 10:32 AM
  #8  
opjose
 
opjose's Avatar
 
Join Date: Nov 2005
Location: Poolesville, MD
Posts: 12,624
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

Yes, great engines.

GMS also makes the Tower Hobbies engines too.

I find that they only settle down after 4-5 tank fulls of fuel.

Then the engine will idle reliably and very slowly.

The GMS produce gobs of power, one reason the TH .75's are so popular.

Old 09-20-2007, 11:55 PM
  #9  
D-LOCO
Senior Member
 
Join Date: Nov 2005
Location: Albuquerque, NM
Posts: 112
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

I have three GMS engines; a .32 on an LT-25, a .40 on a TH Kaos and a .76 on a 4*60.

They have been excellent engines for me.

I have, however, replaced the glow plug that came with the engines with OS A3's.

I use 10% nitro fuel.

The engines have been reliable and powerful.

Price right too.

Dave
Old 09-21-2007, 12:15 AM
  #10  
braindr
Junior Member
 
Join Date: Aug 2007
Location: cape girardeau, MO
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

I have a GMS 1.20 it stops running when I back down on the throttle in flight. I changed the lines any Ideas?
Old 09-21-2007, 08:13 AM
  #11  
acarter
 
acarter's Avatar
 
Join Date: Nov 2006
Location: schuylkill haven, PA
Posts: 927
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??


ORIGINAL: nk1851

Are these engines any good? They are priced well.
Thanks
somebody at the field has one, he loves it and man does that thing scream
Old 09-21-2007, 10:20 AM
  #12  
opjose
 
opjose's Avatar
 
Join Date: Nov 2005
Location: Poolesville, MD
Posts: 12,624
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??


ORIGINAL: braindr

I have a GMS 1.20 it stops running when I back down on the throttle in flight. I changed the lines any Ideas?
At higher speeds the pressure from the muffler increases the fuel flow into the carb.

As you back off, that pressure remains.

If your low speed needle is too rich, the engine can shut off as the glow plug cannot overcome the cooling effect of all of the fuel.

Conversely if the mixture is too lean as you back off, the engine can stall out for lack of fuel.

Old 09-21-2007, 01:59 PM
  #13  
Ugo Ferrari
Senior Member
My Feedback: (1)
 
Ugo Ferrari 's Avatar
 
Join Date: Jan 2002
Location: Ft.Walton Bch.|, FL
Posts: 439
Likes: 0
Received 1 Like on 1 Post
Default RE: GMS Engine??

Forgot to mention the availabity of parts thru Tower !! Cheap shipping too !
Ugo
Old 10-13-2007, 09:42 PM
  #14  
Knife Edge2
Junior Member
 
Join Date: Oct 2007
Location: Redlands, CA
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

My club has been using OS Max LA .40 's for our pylon races but they have been discontinued. We have been looking into the GMS .40 ABC . We would like to have something similar to the O.S we were using. Any comments?
Old 10-13-2007, 10:34 PM
  #15  
opjose
 
opjose's Avatar
 
Join Date: Nov 2005
Location: Poolesville, MD
Posts: 12,624
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??


ORIGINAL: Knife Edge2

My club has been using OS Max LA .40 's for our pylon races but they have been discontinued. We have been looking into the GMS .40 ABC . We would like to have something similar to the O.S we were using. Any comments?
The OS LA .40's are about the equivalent of a GMS .32 engine ( or less ) in terms of power.

If you switch to the GMS .40 ABC's you find that the guys flying these will have far more power and speed than those flying the LA .40's.

Wonderful engines. Leave the needles as they come. Run them at varying throttles for a couple of tanks, tune a bit, another tank, tune more, retighten the cap screws and make sure everything is tight then fly.

Note the warnings about tightening the muffler screw when the muffler is warm, or else the exhaust will rotate in flight.





Old 11-05-2007, 10:58 AM
  #16  
avionette
 
Join Date: Dec 2005
Location: Verona, ITALY
Posts: 271
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

I know this the gms engine has pressure problem
Old 11-05-2007, 11:36 AM
  #17  
opjose
 
opjose's Avatar
 
Join Date: Nov 2005
Location: Poolesville, MD
Posts: 12,624
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

Says who?

I've run plenty of Tower and GMS engines.

As long as they are set up properly and the carb is properly installed there is no "pressure problem".


Old 11-05-2007, 12:03 PM
  #18  
bigedmustafa
My Feedback: (2)
 
bigedmustafa's Avatar
 
Join Date: Jun 2005
Location: Omaha, NE
Posts: 4,109
Likes: 0
Received 0 Likes on 0 Posts
Default RE: GMS Engine??

The folks at http://www.mecoa.com are closing out their remaining GMS engine inventory right now, and they have some pretty good deals. You can buy 3 of the GMS .47 engines for $169.99 after coupon code (GMS2007). You can buy 2 of the GMS 1.20 engines for $189.99 after coupon code. They also have a deal where you can get a GMS .40, a GMS .47, and a GMS 1.20 all for $189.99.

My experience with the GMS .47 was very positive, and I wouldn't hesitate to buy another one of these engines for the right project.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.