Can someone explain glo vs. gas engine designations? How do they compare for power? - Page 6 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 11-05-2014, 07:14 PM   #51
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Re: Can someone explain glo vs. gas engine designations? How do they compare for pow

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Originally Posted by cosmith View Post
On another note, something I wanted to mention to the OP. As far as tank pressure goes with glow engines, you have to be careful with aftermarket exhausts. If an exhaust flows better the pressure inside will be lower. I encountered this with a pitts style muffler on a OS .46AX. I could get it to run reasonably well, but I could never get it rich enough to 4 stroke, even with the high speed needle wound all the way out. After a bit of research I plugged up one of the outlets on the exhaust which increased my tank pressure and solved all my problems.
My Co-member and fellow pilot has a very valid point.. one which I was just dealing with last week and have to finish.. and somehow forget to mention.. But Cory is absolutely right about the mufflers.. strapping on a different muffler just because it looks or sounds cool.. can cause no end of headaches.. and here is a little test you can do if you suspect that you may not be getting muffler pressure..

start up your engine as you would normally... and let it warm up.. you want the exhaust gases to be hot so that they expand in the muffler to create back pressure,, you may have to touch your idle up a bit to keep the engine running .. but with the engine running pull the line off at the muffler... then put on a second spare line to the muffler.. have a glass of water handy and put the other end of the line in the water slowly.. and see how deep it goes in the water and blow bubbles.. If the line is only about 1/4 inch below the water surface you should see a few bubbles popping out.. if not .. you have a problem.. you should see a few bubbles coming from the line up to about an inch below the water surface.. at inch and half.. if you still see bubbles.. you may have a different problem.. too much restriction

And Corey !! "OP" had better not stand for " old people "

I will soon be setting the fuel aside for a short bit for a new project coming along..
I have gotten bitten by the jet bug.. my first serious electric
a 57 inch Viper with 90mm 12 blade EDF
This should bring some serious crap to the shop.. have not played with electrics much..

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