RunRyder RC
WATCH
 1 page 870 views POST REPLY
HomeAircraftHelicopterGasser Model RC HelicoptersEngines › Zenoah temp
12-03-2015 04:48 AM  31 months agoPost 1
paul chu

rrNovice

taiwan

My Posts: All  Forum  Topic

Hi guys
what`s the Zenoah 26 temp at full load. I just test a brand new Zenoah 26 mounted in Futura SE and use a electric axial flow fan to remove heat from engine fin. the temp indicator shows 160 degree C when throtle at half position. Any suggestions ?

PM  EMAIL  GALLERY  Attn:RR  Quote
12-03-2015 01:23 PM  31 months agoPost 2
rcnut

rrElite Veteran

Rockford, Illinois

My Posts: All  Forum  Topic

You can't go by temp, it can be deceiving. Temps can vary greatly depending from where you are measuring. 160C is 320F and depending from where you are taking that measurement, and providing this motor is broke-in, and depending on the ambient temperature, it could be ok.

On my Goblin gasser, I have a temp sensor mounted under the spark plug washer, right on top of the cylinder head. The motor is broke-in...on a warm day (85 degree'ish) it will run somewhere around 240-260, depending how hard I fly it and at which head speed (1950-2050), 30 degrees...220-240.

So based on what you're asking...brand new motor...it's too lean! Unless you are measuring the temp by the exhaust port... A new motor shouldn't run the hot brand new. With the "break-in" needle settings, you should be able to touch and somewhat hold the cooling fins on the cylinder and NOT get burned. It should be very warm to the touch.

There are plenty of threads here that explain how to properly break-in a gas motor. Including the best oils to use!

Team Miniature Aircraft
"I love the smell of Nitro in the morning!"
...Citizen 654!

PM  EMAIL  GALLERY  Attn:RR  Quote
12-03-2015 07:20 PM  31 months agoPost 3
RM3

rrElite Veteran

Killeen, Texas - USA

My Posts: All  Forum  Topic

on a hot day here in central texas, my engine would reach 375F as measured from the spark plug washer...

listen to the engine and tune accordingly... keep it happy with a good oil/fuel ratio ( I like to go more oil during the summer) and run it in the proper RPM band...the engine will last for years before a rebuild.

showing a preference will only get you into trouble, 90% of everything is crap...

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2015 04:24 AM  31 months agoPost 4
turboomni

rrProfessor

East of the Equator

My Posts: All  Forum  Topic

Well I learned many years ago when there were not temp guns readily available,,,raja said if you spit on your finger and placed it just above the carb inlet and it boiled you were too hot. It has worked for me for many years and I have never burnt an engine.

Setup is everything, All my heli's can fly far better than I can pilot them

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2015 07:03 PM  31 months agoPost 5
RM3

rrElite Veteran

Killeen, Texas - USA

My Posts: All  Forum  Topic

Ive used a similiar technique before i put a temp sensor on the spark plug...i would put a finger on the bottom of the engine, if i couldnt keep it there for more than 3 seconds, it was running too hot...worked for a long time, now I just use that along with a temp sensor to watch whats happening and record a peak reading when flying as my engines are modded by me.... so the more I know whats happening the better.

but the old finger test works... just gotta know what your doing first

showing a preference will only get you into trouble, 90% of everything is crap...

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 870 views POST REPLY
HomeAircraftHelicopterGasser Model RC HelicoptersEngines › Zenoah temp
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Wednesday, July 18 - 5:56 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online