Paul White

41 minutes ago, Blackburn Mark said:

As long as your entire kit weighs less than 75kg with a reserve, you are good.

Thank you Mark. That's very helpful

Does anyone know if you're free to install whatever engine you like in a paramotor in the UK? A four stroke model aircraft engine may be nice, but not if it renders you uninsured etc.

On 10/29/2022 at 5:20 PM, alan_k said:

Ooh a radial for a paramotor, that would be novel. 25 hp is good, can the all up weight match a BaileyV5, about 28.5kg dry or less?

They're about 12kg. A battery for the fuel pump/ignition/starter would increase the weight.

On 8/20/2017 at 8:04 PM, Casper said:

So would an engine like the Moki 400cc 5 cylinder radial engine work? it's about 23hp and weight 9,2 kg. Since it have low rpm and high torque it should work as direct drive.
Or even better, the VM R5-420, 5 cylinder from Valach that have 25hp and weighs just 11,8 kg (without exhaust, many options there). Recommended propeller diameter for RC are up to 106cm for the wooden propellers. I'm almost sure a nice lightweight carbon propeller with a slightly bigger diameter would fit.

Biggest problem would be cooling as I see it, and maintance. Fuel economy is actually very good according to some websites (better than our 2strokes).
Ofc it's not an optimal engine for ppg, but I would love to show up with radial engine on my back, and the sound is magic!

 

I've sent a tentative enquiry to Valach. I too am curious about the 420cc radial. Probably not a workhorse but could be entertaining for little flights on a fine day. I'm just learning to fly. Not sure if the lack of clutch would be a dealbreaker.

250 shown below with enclosed valve train.