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Old 01-18-2021, 09:18 AM
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solentlife
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Join Date: Oct 2010
Location: Ex UK Brit now in Latvia west coast - Ventspils
Posts: 12,766
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I have the dubious honour of 222kph with a Hobby King Parkjet ..... it had a 450 Heli motor with 3S battery ... 4S was tried - but she was uncontrollable. To launch the 'Beast' as she was nicknamed by fellow club members - I used a bungee catapult ramp.



Here's one of the slow flights :


Here's trying to get her away with 4S :


I used a Pitot tube speed checker making sure I avoided dives and false speed runs.

I later created a 'twin' Parkjet using two 250 Heli motors - but it just would not fly !! Calculations indicated a speed of over 300kph if I could get her to launch !

I've pushed 50mm EDF T45 to over 150kph ... another I fitted a pusher prop and she hits 180+ kph ...

My problem now is reaction time ... I'm not so young anymore and eyes are not what they used to be !!
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