ORIGINAL: bem
Hi,
I'm just curious - do You think the advantage with contra rotation props is so big that top fliers
need to use it to be able to stay at the top?
This unit is a very nice thing and it looks so cool and seems to be some clear advantages but the added cost of $1200-1300 (for Brenner's unit) will not help to broaden the base of people want to get more serious into F3A flying I'm afraid. But maybe there will be more manufacturers of contra rotationg props units in the future and cost will hopefully get down a little.
The spinner/props looks rather fragile and a light prop strike is out of the question I suppose.
Anyone know what contra rotation props unit Sebastiano Silvestri use on his Wind S Pro ''all composite'', seen in the picture in link below:
http://<font color=''#00265e''>http:...de=view</font>
/Bo
Hi,
Just a few pointers;
The props are no more fragile than any other carbon props.
Brenners drive has a clutch built in that will slip in the event of a strike so the props do not break.
Seba's unit is now down to 2500 Euros thats $3500.00 .
For the $1200 you are getting 2 props at $100 each and the spinner at say a value of $100.
Then you can buy a motor only (no gear box) saving $300.
It is a net increase of $700.00 approx over a standard good quality motor/prop spinner set up.
There are gear and prop options with Brenners that makes it a for more adaptable unit to your model choice and or the weather thats prevailing.