What about GMS 76?
#1
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What about GMS 76?
I need an engine in the 75 range for my Goldberg Chipmunk (45-60), I was thinking Tower Hobbies 75 but its out of stock until late march and who knows if it wont be delayed even more like it usually happen to be...
OS 75 is out of my budget and I want something simple because of dead stick reliability calculation, in addition the chipmunk comes with a cowl so its not gonna be easy to adjust.
Any experience with the GMS 76, should I wait for the tower 75, is there a difference between them?
How does the pitts muffler affect the motor performance?
Thanks
Alex
OS 75 is out of my budget and I want something simple because of dead stick reliability calculation, in addition the chipmunk comes with a cowl so its not gonna be easy to adjust.
Any experience with the GMS 76, should I wait for the tower 75, is there a difference between them?
How does the pitts muffler affect the motor performance?
Thanks
Alex
#3
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RE: What about GMS 76?
90 2 stroke engine seems to be too big for 7 lb airplane, besides I dont like supertigers they seem to need special adjustments with the high and low end valves.
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RE: What about GMS 76?
the gms .76 makes the same power as the st .90 with a lot less weight. from what i have heard the gms makes the same power as the th .75 or a little less but either way it should be plenty of power for that plane.
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RE: What about GMS 76?
GMS engines, like many others, run great if the carb you get isn't leaky or has a mis-drilled spraybar. My first and I hope only experience with a GMS engine demonstrated both issues, and that was not unique according to field reports I've found scattered throughout the forums. So if you are thinking dead-nuts reliabilty check it out thoroughly on the bench first. This was with a .32, and although I've seen/heard the same about other sizes you may want to check that out first.
MJD
MJD
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RE: What about GMS 76?
ORIGINAL: Alex7403
90 2 stroke engine seems to be too big for 7 lb airplane, besides I dont like supertigers they seem to need special adjustments with the high and low end valves.
90 2 stroke engine seems to be too big for 7 lb airplane, besides I dont like supertigers they seem to need special adjustments with the high and low end valves.
Personally, Super Tigre is my favorite two stroke. A .90 is a little on the large side, but Super Tigre also makes a .75 and it would be cheaper than an OS. Close to $100 cheaper.
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RE: What about GMS 76?
Go and get it..
seal the muffler parts with RTV silicone, and push the carby hard on it's seats!
You won't regret it as we don't regret the tower 75.
seal the muffler parts with RTV silicone, and push the carby hard on it's seats!
You won't regret it as we don't regret the tower 75.
#11
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RE: What about GMS 76?
Thanks guys,
I just read about the affect of the pitts mufflers on the performance of the engines and it looks like I'll dig out some 91 I have to use in that airplane before I purchase a new unknown engine.
Thanks
Alex
I just read about the affect of the pitts mufflers on the performance of the engines and it looks like I'll dig out some 91 I have to use in that airplane before I purchase a new unknown engine.
Thanks
Alex
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RE: What about GMS 76?
ORIGINAL: w8ye
The Tower 75, GMS 76, Super Tiger G75, and Super Tiger G90 are all made in the same factory by the same company.
The Tower 75, GMS 76, Super Tiger G75, and Super Tiger G90 are all made in the same factory by the same company.
#15
RE: What about GMS 76?
GMS engines are great. They are strong runners and reliable. I have a couple of .47s and a .61. The 61 really hauls for its size, and the .76 is a bored and stroked .61, so it will give heaps of power. Theres a couple of guys at the club with GMS .76s and they swear by them. They fly circles around similar sized OS engines. I think this is partly due to the cost - they aren't afraid to push them to their limits like they would be with an engine that cost nearly twice as much. And the big GMS muffler (same as the Tower muffler) really gives it a boost.
#17
RE: What about GMS 76?
ORIGINAL: w8ye
I think the first 76's had dykes rings in them?
I think the first 76's had dykes rings in them?
#19
RE: What about GMS 76?
Just for clarification, the Super Tigre 90 is the same size as the Super Tigre .75. They are only 2 oz more than the Tower .75. I wouldn't hesitate to put the Super Tigre .90 in the place of a Tower .75. It is $30 more than the Tower .75 however.
Blessings, Terry
Blessings, Terry
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RE: What about GMS 76?
Does anyone know if GMS has been discontinued? Tower can not tell you anything about them, All parts seem to have been sold out and not replaced! Everywhere I have looked can not find parts! I am trying to find out like what carbs fit the other GMS engines like the 47? Just have been looking for aswers on the GMS and the online shops I have called do not seem to have any!