Stuprop83 Posted July 19, 2020 Share Posted July 19, 2020 Hi all am so passionate about the sport but with a family funds are hard . I'm pretty clued up on the mechanical side and was hoping for some advice on a redrive system on a 100 cc motorcycle engine and reduction. Quote Link to comment Share on other sites More sharing options...
admin (Simon W) Posted July 20, 2020 Share Posted July 20, 2020 I am not the man for that job, but there are many in the club that are! Over the years we have seen a couple of DIY Paramotors which included, one with an NS125r engine which by all accounts worked amazingly well! My recommendation would be that you would be better off buying a 'restoration' type paramotor and mending it / restoring it. Either way, good luck and welcome to the Paramotor Club! SW Quote Link to comment Share on other sites More sharing options...
AndyB Posted July 20, 2020 Share Posted July 20, 2020 Goto the FB group "Paramotor Homemade". Quote Link to comment Share on other sites More sharing options...
Big_para_mike Posted July 20, 2020 Share Posted July 20, 2020 Stuprop83 Hi, I am presently 'refurbishing' a paramotor using an old Fly products power 115 frame which had a mangled bottom end that was badly repaired which I have rebuilt & rewelded. The original frame seems good quality. I have relapced the side arm system as they had a very bad reputation. To this I bought an old F3 adventure which had a low hours solo 210cc that didnt have any tuning components. I aquired a old solo210 with a high compressioh head, easy start and battered piston - looked like it had eaten an m4 screw. So now I have a good Solo210 which I have stripped & rebuild. I added a fresh breeze tuned pipe which has a lower tuned speed for fuel economy not just peak power. And I have made a large carbon fibre silencer. The original frame came with a large 18L tank so I have accomodated that on the reworked frame. I was looking for a reliable unit that has sufficient power for a big 94Kg bloke for longer cross country, that is quiet and reliable. The F3 had an electric start which I have fitted with a 15V 2500Ah lipo. I also wanted to 'know' the unit so as being a mechanical bloke, like you sound like you are, I would be able to fix / repair / bodge things as needed in the moment. Im just about finished - it runs beautifully, starts easy, sounds sweet and the weight is good. The solo also has a position on the end of the crank for a very small generator coil so you can recharge instruments in flight. I am planning on landing out a few times. The solo engine has a huge following in home build aircraft and parts are still available. there is a lot of Polish guys tuning them. Loads of hours of work but I have what I want, I thinks its almost as good as new and I have spent about £800. maybe a tad more. I have the old F3 harness which i was planning to use initially but if anyone has a L/XL cumfy harnes (low attachment) going cheap I would be delighted to make an offer. I was planning to do a bit more flying before I bought a new harness so I can know what I really want. I though about making the paramotor frame but there is so much work I very quickly decided to 'refurbish' one. There is also a considerable amount of knowledge and experience built into these things. Ive taken about 5-6 months & I have a lathe, mill etc.. and was lucky to find bits out there but I think there must be lots of dusty projects lurking. I should say I'm not an experienced paramotor guy, my background was years of hangliding. I picked up a nice 4 hours glider for £950 plus you will need a reserve my thought process, given my mechanical skills was Excellent glider, comfortable harness, good reserve chute, make the motor work If I have this wrong then I'm sure I will have provoked some feedback .. Hope this helps. Mike Quote Link to comment Share on other sites More sharing options...
Blackburn Mark Posted July 21, 2020 Share Posted July 21, 2020 (edited) On 20/07/2020 at 11:36, Big_para_mike said: Excellent glider, comfortable harness, good reserve chute, make the motor work Being a skinflint and a bodger, ill second that No images of your build exploits Mike? There are too few on here with grubby hands! Promise not to laugh at your welds Edited July 21, 2020 by Blackburn Mark Quote Link to comment Share on other sites More sharing options...
Blackburn Mark Posted July 21, 2020 Share Posted July 21, 2020 On 19/07/2020 at 13:59, Stuprop83 said: a redrive system on a 100 cc motorcycle engine and reduction. !!!ESTIMATE!!! Assuming about 12/15hp, I would think a 3:1 (ish) reduction at 7 degrees of pitch on a 130cm prop diameter. I think! Too low a ratio and your motor would be unable to spin up the prop to the motors max power // Too high a ratio and the motor would hit its max revs without the prop taking a good bite at the air. It does get done from time to time but the easier option would be to try to get your hands on a damaged/dead machine. Quote Link to comment Share on other sites More sharing options...
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