Ron Gray Posted July 4, 2022 Share Posted July 4, 2022 Anyone had or know someone who has had first hand experience with these engines? Build quality, reliability, performance etc. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted July 4, 2022 Share Posted July 4, 2022 One of my french friends has one and loves it, I will ask him on FB later on tonight,,, Quote Link to comment Share on other sites More sharing options...
Kevin Fairgrieve Posted July 4, 2022 Share Posted July 4, 2022 Ron, take a look at Morris Mini Motors youtube site. Quite a few UMS video`s.Morris Mini Motors. Lovely sound. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted July 4, 2022 Author Share Posted July 4, 2022 (edited) Thanks Paul, a user’s viewpoint would be good. Thanks Kev, I have been on their site but they’re going to be biased as they are a UMS retailer! Edited July 4, 2022 by Ron Gray Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted July 5, 2022 Share Posted July 5, 2022 Biased,, of course, modifying methanol to petrol as well although some manufactures are specifically against it,,, His UMS is running well although he says that each flight the rockers need a good oiling, he is running it on a 3 bladed prop, I saw it do it's first flights and the sound is "Awesome",,, you electrics won't want to save the planet once you have heard one,,,? 1 Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted July 5, 2022 Share Posted July 5, 2022 His is the UMS 180 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted July 5, 2022 Author Share Posted July 5, 2022 (edited) Ah, I was thinking more of the 77. Anyway I’ve decided to stick with my preferred engine of choice that is, of course, Laser and go with a 360v for the Corsair. After all I need to make it to 20! Edited July 5, 2022 by Ron Gray Quote Link to comment Share on other sites More sharing options...
cymaz Posted July 31, 2022 Share Posted July 31, 2022 I’ve had a 7-77 glow for about 10 years now. The manual is very good and should be adhered to. I did buy a Sonic Tronics glow driver system for it . It does cure any chance of the lower cylinders going out. I’ve had only one issue, one of the cylinder con rods came off the crank. I can’t remember the details as it was years ago. A friend of mine repaired it and it’s been faultless ever since. I mix my own fuel. I doesn’t need 18% oil, I cut ordinary fuel 50-50 with methanol and this has worked ok. Quote Link to comment Share on other sites More sharing options...
Cuban8 Posted August 1, 2022 Share Posted August 1, 2022 Watched one of my clubmates fly his large Stearman bipe with a new UMS radial from MMM only yesterday. Ran very well and sounded lovely. Quote Link to comment Share on other sites More sharing options...
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