terry999

Hi all, latest update. I have taken my motor to Airways Airsports today to let them look at it. After a short time we decided to try one of their props. Hoorah!!!! 7900rpm, the prop from USA (supposedly an original Ply Products prop has an incorrect pitch). I nave now bought a 3rd prop, sent the one back to the USA, which will cost me £90 in postage and taxes and am hoping to get a refund from PK for the first prop off him. This is one big lesson learnt. Hopefully the weather will pick up and I'll be in the sky soon. Thanks for all the help and most people were correct with their diagnosis that the prop was the problem. Safe landings, Terry

My new original Fly prop arrived yesterday and was fitted today. Unfortunately there is no change to the revvs which was a great dissapointment. I took the head off and de-coked it today but still no change. As soon as the weather picks up I will see if the power is any better in flight. I am now running out of ideas to solve the power problem.

Hi Fanman, my original prop was from Airways where I bought my motor and this was factory fitted by Fly Products. This was destroyed after around 1 year and a replacement purchased from Paul Kilburn. This was a 122cm Power prop which seemed to work fine with no power problems. Three weeks ago I had set up for a foreward launch, I revved up to provide some air movement, stepped back one step ready to run but somehow one line was drawn into the prop pulling most of the left hand lines into and around my prop. Thankfully I was only at tickover but it still threw my back onto the floor, destroying my prop and most of the left hand lines were wound around the reduction wheel causing a slight tear in the belt and lines cut and damaged. I have had my wing repaired at The Loft, replaced the belt, which seemed to be very tight and overtensioned. I purchased a replacement prop, the same type as before, 122cm power. I fitted this and flew in Wales but had next to no thrust gaining only 400ft above groundat full revs. I then purchased a tiny tach to enable me to accurately measure the revs, 5900rpm at this stage. I then changed the reduction bearings and tested the revs reaching 7500rpm at cold, I thought my problems had ended. I flew the next day but the power was down when the engine was warm reaching 6500 max in flight. I have cleaned and changed my carb gaskets again with no effect. I tried the engine with no prop ( I know this should not be done but I needed to know if the engine would rev freely) 11500 rpm reached immediately. The engine was tuned when warm and the plug is coffee colour. Yesterday I tried the same type prop but 115cn and it reached 7500rpm. I have sent the prop back to Paul along with my original Fly prop which has one edge damaged for him to check and compare the pitch. If I have left any info you need please let me know and thanks for your help in this matter. Terry

Tried a 115 cm prop today and it seems to be reving higher to 7500rpm. I have spoken with Paul Kilburn and he is going to check this prop against my original. Both will be sent back to him tomorrow, hopefully sorted and flying soon. Terry

Hi all, I am new to the Paramotor Forum so please forgive me if my problem has been discussed before, ( I am sure this is not a new problem). I fly a Dudek Reaction TST with a Fly Kompress (black devl engine). I have recently had problems getting full power with my max revs being 6500 rpm. I have changed the reduction belt and bearings after a prop strike but I'm still having problems getting full power. On several occaions when my engine is cold it will reach 7600 rpm but after a few mins when I am ready to fly my power is reduced to 6200 - 6500 rpm. I have flown today reaching 6500 rpm but when getting back home and the engine is cold again its going to 7100 rpm. I have tried altering the belt tension. Has anyone got any suggestions as this engine has only done 50 hrs. Terry.