cobra Posted February 20, 2011 Share Posted February 20, 2011 Hi Im moving from a high hang machine (adventure F3) to a low hang point machine (airfer polini thor) what tips n hints have you got please and what suprises to watch out for Cheers Gary Quote Link to comment Share on other sites More sharing options...
garyfreefly Posted February 20, 2011 Share Posted February 20, 2011 No suprises you have seen the light Enjoy.... when it gets rough it gets a bit more twitchy but thats about it Quote Link to comment Share on other sites More sharing options...
fanman Posted February 20, 2011 Share Posted February 20, 2011 Keep the chest strap tension right to ensure you don't get any lateral loads on the swing arm bolts in the event of an asymmetric. When forward launching ensure the risers aren't routed under the swing arms. Hang check the set up and do so while someone gives a 60kg push in the middle of the prop boss. This will alert you to likely angle changes between powered and unpowered flight. This can be significant if you are short in the leg and long in the body (ie a relatively high personal c of g) and can be exacerbated by the use of a behind the head reserve mounting. The low hang points can help with weigtshifting if the rest of the geometry is right while the swinging arms can help to absorb torque. Don't expect the harness to be anything like a free flying harness though. Finally check those swing arm bolts and arm ends regularly (and the harness and crab attachments) for wear and possibility of failure). Quote Link to comment Share on other sites More sharing options...
aquatix Posted February 20, 2011 Share Posted February 20, 2011 Good point about the set up. I got mine set to the perfect angle in a static hang test but then found that under power I was pushed past the vertical and about 15 degrees forward. Just needed to move the hang points forward for future flights. Not all low hangpoints will do that though, it depends where the thrust line acts relative to the karabiners. when it gets rough it gets a bit more twitchy but thats about it Twitchy in a better way (for me). With my old fixed hang point motor I always felt like I was rattling around in turbulence with the whole paramotor being tilted side to side. Now all I feel in rough air are the pivot arms moving independently up & down, which gives a much more secure feeling in the harness with less pitching about. Can't really think of any negatives, although plenty of people still seem to prefer high hang points. Quote Link to comment Share on other sites More sharing options...
cobra Posted February 21, 2011 Author Share Posted February 21, 2011 thanks guys, I assume on the swing arm bolts im looking for bending or fractures? are these bolts used graded aircraft use? or are they just plain old stainless steel? Quote Link to comment Share on other sites More sharing options...
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