Moohammy Posted June 12, 2012 Share Posted June 12, 2012 I've read lots and watched enough youtube to realise I know nothing. So, I'm asking opinions, guidance, advice (call it what you will). looking at a paramotor. I like the idea of a polini thor (the centrifugal clutch) seems a sensible idea. but I also like the idea of the bailey v5. can you please give me an idea of the pro's and cons of each and why I would/should purchase one rather than the other? really appreciate the feedback (rather than a trolling fest ) thanks in advance Rich Quote Link to comment Share on other sites More sharing options...
Guest Posted June 12, 2012 Share Posted June 12, 2012 Hi, I guess for me, its having the ability to take apart and fully repair the (very simple) engine of a 2 stroke that keeps me with them. Also, with direct injection 2 stroke already being fitted to 50cc and 125cc motorbikes, that HAS to be the future. 4 stroke advantage as I see it, longer flight times before filling up. The reason this is not a problem for me is that I have managed to fly from Lands end to JOG, and across the Sahara desert and was more than happy landing every 2 hours 45 mins for a brew and a pee. SW Quote Link to comment Share on other sites More sharing options...
Trickyh Posted June 12, 2012 Share Posted June 12, 2012 2 Stroke pro's Better power to weight Light Simple Cheap to manufacture Cheaper spares Lots of choice from big manufacturers ie: Polini, Simo etc 2 Stroke cons Harder to tune More complicated exhaust (tuned) More irritating exhaust note (high pitched) Have to mix fuel Use expensive synthetic racing oil 4 Stroke pro's Better low down torque Swing bigger prop at lower revs More agreeable exhaust note (lower pitch) Easy fueling (no mixing) Fuel efficient Simpler exhaust sytem 4 Stroke cons Lower power to weight Thrust figures not up to 2 strokes (yet) Initial cost Limited choice Harder to maintain More complicated Horses for courses really.. Look at the results of the recent UK nats 75% 2 stroke to 25% 4 stroke. And that's mostly cos it was a UK comp and we have a UK 4 stroke manufacturer. On the continent or in the US you will be lucky to see any.. Rich (the other one) Quote Link to comment Share on other sites More sharing options...
enzo200500 Posted June 12, 2012 Share Posted June 12, 2012 Rotron.......... Quote Link to comment Share on other sites More sharing options...
Trickyh Posted June 12, 2012 Share Posted June 12, 2012 Rotron.......... Mmmh Rotron... The Chuck Norris of paramotor engines Quote Link to comment Share on other sites More sharing options...
Moohammy Posted June 13, 2012 Author Share Posted June 13, 2012 Thanks for the feedback. Just makes the reading more interesting. Still undecided. I don't think there's a killer argument for either. I'm guessing I would like to do a bit more XC type of flying. But I'm not sure I want the added complexity of a 4-stroke (i guess in my naievity i'm thinking there's just more to go wrong?) Anyhow, thanks again. it's much appreciated. Quote Link to comment Share on other sites More sharing options...
ptwizz Posted June 14, 2012 Share Posted June 14, 2012 I would not agree that 4 strokes are less reliable. In my 35 years experience of motorcycles, I've wasted a lot more time repairing 2 strokes than 4 strokes. Pete Bailey 175 Ozone Indy Quote Link to comment Share on other sites More sharing options...
seymore Posted June 14, 2012 Share Posted June 14, 2012 You are much more likely to have a very expensive failure with a two stroke. With the oiling system, walboro carb and the complex exhaust the two stokes are prone to costly failures. They seize rather easily if not in tune, or if they get a small blockage in the carb, The exhausts on a lot of them are prone to cracking. My old H&E sent the muffler core through the prop ££££, seized a couple of times ££££ and had all sorts of other problems. Break an Italian made engine in late July and you will be lucky to get spares before September because the factory will be shut down for the holidays. Now I have had problems with my Bailey in the 200 odd hours I have flown it, but none have cost more than £150 or kept me out of the air for any length of time and the motor looks as good as new and has a great many more hours left in it. + a four stroke can be flown in far greater comfort over much longer flights and will not piss off all your neighbours quite so much. Quote Link to comment Share on other sites More sharing options...
macey2kk Posted June 16, 2012 Share Posted June 16, 2012 Rotron.......... Mmmh Rotron... The Chuck Norris of paramotor engines Gotta agree.... But then i am biased! Quote Link to comment Share on other sites More sharing options...
enzo200500 Posted June 16, 2012 Share Posted June 16, 2012 Very shiny-and pink...... Who did the pink p/jet stickers. Was it p/jet or a sign shop? Quote Link to comment Share on other sites More sharing options...
macey2kk Posted June 16, 2012 Share Posted June 16, 2012 Parajet did them enzo They had already done some for an American guy ( the whole machine ) and he even had custom pink revo wings too! That's next! After I've blinged up my new poloni 200 zenith that's on it's way.... Nice! Quote Link to comment Share on other sites More sharing options...
enzo200500 Posted June 16, 2012 Share Posted June 16, 2012 Cheers macey, I was trying to find the font type they use. Anyone have a clue? 200 Zenith, now thats a beastie. Quote Link to comment Share on other sites More sharing options...
Hann__ Posted September 13, 2012 Share Posted September 13, 2012 The OP mentioned clutched props. What are the pros & cons on Paramotors with those? As someone with zero experience a clutch to me seems like a useful refinement. Quote Link to comment Share on other sites More sharing options...
Trickyh Posted September 15, 2012 Share Posted September 15, 2012 (edited) I prefer clutched motors, and since moving from a Bailey (JPX) to a Polini, I find it an added bonus and was part of my decision process when opting for the Polini.. I never liked the fact that the Bailey was direct driven and was a bit of a beast on start up. The Polini clutch just makes things more refined. You wouldnt start a chainsaw or brush cutter without a centrifugal clutch would you ? Any negs would be extra complication and possibility of clutch slip when worn, but the Polini is a proven unit now. I do like dropping to idle and just let the prop windmill while sniffing out the odd thermal.. Edited September 15, 2012 by Guest Quote Link to comment Share on other sites More sharing options...
outkast Posted September 15, 2012 Share Posted September 15, 2012 I prefer clutched motors, and since moving from a Bailey (JPX) to a Polini, I find it an added bonus and was part of my descision process when opting for the Polini..I never liked the fact that the Bailey was direct driven and was a bit of a beast on start up. The Polini clutch just makes things more refined. You wouldnt start a chainsaw or brush cutter without a centrifugal clutch would you ? Any negs would be extra complication and possibility of clutch slip when worn, but the Polini is a proven unit now. I do like dropping to idle and just let the prop windmill while sniffing out the odd thermal.. Have to agree with the sentiment that the polini is a proven unit, part of the desicion for me in choosing one was that the thor motor is based on the very same motor that is powering thousands of scooters all around the world, whos owners do very little maintainence on them and thrash them around cities mile after mile. we take much more care of our motors and treat them with far more respect than your average scooter rider who just uses it for commuting. not only that but you can see the quality of manufacture thats gone into it, every bit looks like a quality item. I think the thor is proberly the best two stroke motor in PPG at the moment. I like the clutched prop and the fact its power devlivery is nice and smooth, coming from a "all or nothing" type delivery of a pap ros, it took a bit of getting used to but I love it. Quote Link to comment Share on other sites More sharing options...
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