Proair

Hello,

It is very likely that the solutions to get this machine in the ultralight category at 450 kg max take off weight cause them trouble.
This machine is given for 300 kg empty. For ultralight it has 25 to 50(Germany) kg overweight.
Any modification must be lighter than what they have today.
A number of compromises have already been taken but not enough.
Without reaching the Ultralight weight this machine has no value on the European market.For me it is a premature project with some possibility' brought far to early in the publicity.
All the newcomers in manufacturing gyroplanes in Europe start with fully enclosed two seaters in the Ultralight category. Probably they think that the excisting manufacturers are not competent enough to do it.
Unfortunally most of them disapear before they reach their goal. All the ones I know (4) had no experience with gyro's. All four make or made a lot of publicity before they had a reasonable product.
There is even one that had a prototype only be flown by their own pilot and sold 5 machines already. The machines are going to be a copy' of the stripped down prototype with numerous modifications. the prototype had to be stripped to copy the parts!!!
To me this means the customers are going to get another prototype that never flew.
I do not think that most of these people have any Idea how much time and money is required to build a good gyroplane.
Another common thing is they al start with a Hirth two stroke or a motorcycle engine while an experienced home builder knows about BMW 2 cylinders and Suzuki oil coiled engines, not to speak about Hirth.
Some of these people have no problem to anounce a fuel consumption of 15 liters per hour at fenomenal speeds with two people on board and a two stroke engine.
Any homebuilder knows a single seater pushed into speed burns with a rotax two stroke up 25 lit per hour.


JOS





JOS
 
I notice that Proair claims a VNE of 227 km, which I have a pretty clear idea of being 140 MPH. (I got tagged for 221k in a 60k zone in Germany in 1986, which worked out to 137mph, so this number is pretty clear in my mind).

I can't imagine you could make it go 140, except for straight down with the rotors off. The cruise speed is given as 100-150kmh (60-90mph) which seems more reasonable and comparable to other lead sleds, and normal max speed as 180kmh (about 110 or so), which seems a trifle optimistic.

The site does admit that these are estimates (there is nothing on Proair's English site yet. I read Czech thanks to a year studying that language at the Defense Language Institute, long ago).

Thanks to Paul Komender for posting the detailed pictures.

cheers

-=K=-
 
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