learner_driver Posted September 17, 2009 Share Posted September 17, 2009 Does anyone know their reputation please ? Have you got one ? FB monster ? are you pleased with it thanks Quote Link to comment Share on other sites More sharing options...
outkast Posted September 17, 2009 Share Posted September 17, 2009 isnt Hirth the new name for the solo 210? Quote Link to comment Share on other sites More sharing options...
pete_b Posted September 17, 2009 Share Posted September 17, 2009 Does anyone know their reputation please ? Have you got one ? FB monster ? are you pleased with it thanks Over to Norman Quote Link to comment Share on other sites More sharing options...
t_andrews Posted September 17, 2009 Share Posted September 17, 2009 The f-36 is the new name for the solo210. http://www.recpower.com/hirth.htm Hirth is now the manufacturer. At least in North America. Didn't the FB monster switch to the F-33? http://recpower.com/f33.htm Or was it an MZ34? http://www.compactradialengines.com/mz34.html The old monster used to have a tuned pipe f-36 no? http://recpower.com/f36.htm Quote Link to comment Share on other sites More sharing options...
norman Posted October 31, 2009 Share Posted October 31, 2009 Hirth? Love it on the Monster. It purrs and is very quiet I gather, not that I have heard it fly myself having been sitting in it at the time. Very reliable, low revving but some say it is a tad thirsty. Quote Link to comment Share on other sites More sharing options...
wzh Posted November 10, 2009 Share Posted November 10, 2009 I have a F33 AS engine(30HP with hirth's exhaust), I used it as an engine of my paramotor, no reduction, directly drive proper (diameter 80CM),F33 AS weigts 12.7kg, exhaust weights 2.1kg , reduction weigts 2.3kg. RMP over 8000, and thrust is 60kg nearly.For me(73kg),the thrust is enough. advantages of directly drive proper without reduction: 1: light weigt, my paramotor weight 24kg(no fuel) 2: RMP of proper responses variety of throttle quickly 3: short framework, portable and transport shortcoming of directly drive proper without reduction: 1: efficiency of engine isn't the best Quote Link to comment Share on other sites More sharing options...
wzh Posted November 10, 2009 Share Posted November 10, 2009 Hirth engine is famous for the its reliable and long life in the world. BOD is 1000 hours. Quote Link to comment Share on other sites More sharing options...
fanman Posted November 10, 2009 Share Posted November 10, 2009 Please don't bring that thing anywhere near my house as those figures show your prop tips are on the cusp of Mach 1 at sea level. The noise must be apalling. A normal paramotor with redrive has a prop tip speed around Mach 0.5 I owned a direct drive 2 stroke in the past that had a prop diameter that gave a tip speed of around Mach 0.8 and that was bad enough. You can have all the horse power in the world yet it is useless if you can't turn it into thrust. Quote Link to comment Share on other sites More sharing options...
norman Posted November 10, 2009 Share Posted November 10, 2009 On those figures Fanman is close - (M0.97 at ISA/SL +15ºc), keep the wretched thing in the desert somewhere!, 'awful racket. Error correction service! Quote Link to comment Share on other sites More sharing options...
fanman Posted November 10, 2009 Share Posted November 10, 2009 Norman your prop is actually doing about M0.4 (roughly worked out in my head). 5800rpm is the engine revs. Divide that by the reduction ratio (about 2.5 for yours at a guess) to get the prop rpm. Most paramotor props are geared or redrived to turn at somewhere around just over 2500rpm. Quote Link to comment Share on other sites More sharing options...
norman Posted November 10, 2009 Share Posted November 10, 2009 Bugger, doh! Thanks Fanman, I shot myself in the foot there by focusing on direct drive, I will delete the rubbish. 1 Quote Link to comment Share on other sites More sharing options...
bignos Posted November 10, 2009 Share Posted November 10, 2009 Si, i have looked online and my mz34 seems to be the same as the hirth f33, as you know, i have only had onw flight and the exhaust fell apart mid flight and it didnt seem as good as my fly200 (simmo). but my new exhaust has arrived so i will hopefully fly it soon - ill let you know how i get on! Quote Link to comment Share on other sites More sharing options...
bignos Posted November 12, 2009 Share Posted November 12, 2009 Buyers guide:- Engine Size Pilot Range lbs MZ100 100 cc 120 to 180 Black Magic 120 cc 150 to 200 Black Devil 172 cc 160 to 230 BH185 185 cc 160 to 230 Simonini 206 cc 190 to 400 MZ 34 313 cc 200 to 440 Quote Link to comment Share on other sites More sharing options...
fanman Posted November 12, 2009 Share Posted November 12, 2009 It's not just about the motor, there are so many other variables that you can't really quantify weights to engine size in such a simplified form. There are some big motors out there connected to rubbish drive systems that struggle to get light pilots off the ground and can exhibit unsafe levels of torque and propensity to riser twist while other big guys can fly well on surprisingly small motors if proper attention is paid to matching the kit and setting it up right. Quote Link to comment Share on other sites More sharing options...
wzh Posted November 17, 2009 Share Posted November 17, 2009 about F33 noise ,yes, on average it has more heavy. Flying in the sky, the RMP is only 4100 or so. taking off and climbing, RMP 7500--8000. Quote Link to comment Share on other sites More sharing options...
fanman Posted November 17, 2009 Share Posted November 17, 2009 2 strokes work best in their powerband. You have now started operating you machine out of that area and are in the very vague mid-range. you can't use the top end because of supersonic efficiency losses so i have to wonder what you have gained! It must be like permanently trying to drive a Ferrari around in 1st gear. Quote Link to comment Share on other sites More sharing options...
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