Paramotor

Beach paramotor made with a side valve 200cc honda clone engine giving 5hp taken to 6 hp.Pilot 80kgs old ITV Merak wing. Wind 10kph parallel to shore, no usefull lift.
Wont fly from level field..unless pilot is VERY light...Lawnmower sound!!

Category:

Sports

Tags:

• beach
• paramotor

[pipkeajaj]

Oh no, mine is not that engine..This one is a side valve engine of 5hp at 3600rpm..."Side Valve" Yours is a OHV configuration, far better for increased hp at greater rpm´s..

Regards,

Alan.

[pipkeajaj]

You are shure about the thrust?? How did you meassure it? What engine is yours? N}How many C.C.´s? Side valve? The tank is for Go Karts but small, the 3 liter one. Nobody has flown it for quite some time and no one ever more than 40 minutes using some ridge lift...

I´ve been hearing about splash lubed engnines reaching 8000 rpm´s...Is it true? For how long do they stand the beat? This one pushes 20-24 kilos depending on the day...

[pipkeajaj]

I dont see the way to get 47 kg of thrust with a 32 inch prop and 13hp...Drag goes squared with twice the speed and the amount of power consumed by drag is quite some.

A solo 210 direct drive in std configuration gives 13hp+ - and the max extractable thrust in direct drive is 35kg + - .Prop area is important, slow big prop is more efficient.

The airflow speed is more than stated I believe.. I´ll see to it later..lunch is ready!

[pipkeajaj]

Ahhh you should get a book on souping up old side valve engines...I dis whats called "relieving" the cylinder, lowering the head enlaging the "window" area around the valves...bigger more efficient carb (slightly bigger) The snag is that you can not go over 3600 rpm safely on a splash lubricated engine, tangential speeds...but additives like STP for oil help tons in protecction..

If you are very light with a good wing you might just get to fly from level.

[lookupparagliding]

hello, what size prop is it please? Is it direct drive or does it have a 2:1 gearbox that's available for these engines? Very impressive for 6hp. ;o) Good job you've got a wing with a decent glide ratio (6.94:1).

[pipkeajaj]

I had thought of making a reduction and using a slow big prop,half the revs and twice the torque...Gain and loose...gain in efficiency but loose in the reducction (heat)and add weight..what wins? Some day I might try...I wish someone made a flat twin, side valve,splash lubricated engine that gave 20hp at 3000rpm for a weight of 18kilos + 12 frame and fuel...30kg..heavy though..but interesting,based on the torture those lawn mower engines can take and hours of life.

A.

[lookupparagliding]

Hello Alan,

Sorry for the confusion, I thought yours was the same. I should have read the 'side valve' part of your 'more info' section. I think I just picked up on you stating a Honda clone and natural assumed it was a GX200 variant. No harm done ;o)

Cheers,

Robert.

[lookupparagliding]

Hello, I'm fairly sure about the thrust, Sam & I made a simple 'bathroom weighing scales' jig. We got 33kg peak thrust first time but when I fitted the new muffler and 90# carb jet the following week we got 36kg+. It's just a modified GX200 clone(same as yours)uprated to about 15hp with an model prop. 8000rpm is true, ARCRacing in the USA have a dyno data image of a run upto 7,500rpm but do state that they've had one upto 8,000rpm. Not sure on durability. Check out my latest video 'Quick Test'

[lookupparagliding]

Hello again Pipkeajaj. Is this motor flying with the standard 3.6litre fuel tank? If so, could you tell me a typical flight duration on a full tank please.

Regards, Rob Shaw.

Also, my clone motor is going well, we did a thrust test on Friday and we were getting 36-38kg. Digital counter was only showing around 2600rpm on the 86cm prop, I thought it would need to spin a lot faster to get that much thrust.

[lookupparagliding]

I'm thinking I could cut down the super-efficient Helix prop to maybe a starting point of 1.2m and connect that directly. Markus at Helix reckons a 15-20% thrust loss/lower power requirement for a 1.6m so maybe 40% for a 1.2m. If I could get this spinning at 2800-3000rpm then 45kg might be possible??????

[lookupparagliding]

A 2 stroke like a Solo engine runs at highs revs to get the power but the 4 stroke gives more lower down as I'm sure you are aware. I know a larger prop turning slower would be more efficient but I'm afraid to sacrifice too much pitch and suffer dynamic thrust drop while inflight. What prop would you recommend for the clone? Cheers, Rob. :o)

[lookupparagliding]

I'm using 'ThrustHP' calc. I know it's a modellers prop calc program but it can't be too far out for larger props. You can get 47kg static thrust from 13hp if you sacrifice some pitch/airflow speed. Would you reckon on the 36inch prop then? The 1.8m Helix prop I'm using on the 'egg' surely must be sacrificing a lot of pitch to get the quoted 43kg @ 2000rpm.

[lookupparagliding]

Do you know what pitch angle your 83cm prop is? I've calculated it at about 16in. 44lb thrust & 55mph airflow @ 3600rpm/6.3hp.