Fred / Graham,
I believe the ideal combination for a constant speed prop would be a
Woodcomp hub, Arplast blades and a Smart Avionics controller, for the
following reasons: The Woodcomp SR 3000 hub is very well engineered and is
half the price of the Airmaster, the latest Arplast blades PV55 have a slim
aerofoil with plenty of twist (hub to tip) to cope with cruise speeds of 120
/130 Kts (about 24 degs is required) and the Smart Avionics controller is
very good and extremely reliable.
I am trying to persuade Woodcomp to manufacture 100% composite blades for
their SR 3000, so that they can build in more twist with a slimmer aerofoil.
Their current blades have wooden cores with a carbon skin, which makes them
a bit bulky and limits the amount of twist, because of grain run-out. They
also produce a very good leading edge protection.
Regards,
William
----- Original Message -----
From: "Graham Singleton" <grahamsingleton@btinternet.com>
Sent: Monday, May 28, 2007 12:36 AM
Subject: Re: Europa-List: re:propeller optimization
> <grahamsingleton@btinternet.com>
>
> Fred
> Good point. I spoke to the Airmaster guys a few years ago and they told me
> they spent a lot of time looking for the right blades. Warp were far from
> ideal, the design of the prop was for ragwing microlights, but nobody else
> was cooperative. Sad, Arplast would have been ideal but the chemistry
> didn't work so both Arplast and Airmaster lost out. Alain Petit, the
> Arplast boss is a nice guy but his English isn't confident and I don't
> suppose the NZ guys speak much French. What an opportunity missed. Wish I
> had been in the right place a few years earlier!
> Graham
>
> Fred Klein wrote:
>>
>> Those concerned w/ this topic would be well to question the basic
>> performance of the Warp Drive blades. In a series of emails I exchanged
>> w/ Airmaster some time ago, they concede that the shortened blades needed
>> for the Europa and given the speed ranges in which it flies, these blades
>> leave much to be desired.
>>
>> Fred
>
>
> --
> 269.8.0/817 - Release Date: 24/05/2007 16:01
>
>
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