UMS Gas Radial Engine Enthusiasts Rabbit Hole
05-19-2022, 02:51 PM
#51
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Just recently installed the UMS 260 five cylinder in a Hangar 9 40% SU-26. Currently in the process of fine tuning the carb. This engine will eventually be installed in a Balsa USA 1/3 scale Stearman which may not be completed before the end of 2023. Looking forward to comparing the performance of this engine to my Moki 250.
05-20-2022, 03:25 PM
#53
Originally Posted by partshunt
What is the wingspan of the Stearman, also the projected weight for that model, UMS 260 Radial is big motor.
06-06-2022, 02:12 PM
#55
Originally Posted by David Jackson
Curious to know if anyone is running the UMS 260 five cylinder engine. If so, would you be so kind as to share low and high needle valves settings.
I don't have the five cylinder (mine's the 7) but I set the needles to what is recommended in the engine manual. I have never had to adjust them, even after having many flights on the engine.
Gary
Yesterday, 10:07 AM
#58
Join Date: Nov 2004
Location: Nanaimo,
BC, CANADA
Posts: 65
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Karolh, which size is your seven cylinder. I ask because on the 7 cylinder 50cc , comes with UMS carb, or you can get the Walbro carb. Is yours seven cylinder bigger with the Walbro carb, gasoline engine?
