---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Fri 07/30/10: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:27 AM - Re: CATTCO PROPS 3 Vs 2 (rveighta@comcast.net) 2. 06:38 AM - Re: CATTCO PROPS 3 Vs 2 (FLYaDIVE) ________________________________ Message 1 _____________________________________ Time: 05:27:49 AM PST US From: rveighta@comcast.net Subject: Re: RotaxEngines-List: CATTCO PROPS 3 Vs 2 Barry, I installed a three blade Catto prop on my RV-8A back in 2003. I sol d the plane last fall after 450 hours. The prop performed great for me. The only problem with the 3 blade was that it made the cowl h arder to remove than with a two blade prop. Walt Shipley ----- Original Message ----- From: "FLYaDIVE" Sent: Thursday, July 29, 2010 5:32:19 PM Subject: RotaxEngines-List: CATTCO PROPS 3 Vs 2 Hello Gaggle: =C2- I am looking for some information on CATTCO PROPS. =C2- This is their web site: =C2- http://www.cattoprops.com/index.html =C2- Is anyone using their props? =C2- Info needed is: Three Blade Prop Vs Two Blade Prop. Is a 54" Pitch CATTCO equivalent to a 62" Pitch Sensinich? Why is there so much of a difference in pitch call-out between the two? I say this because a 54" is what was recommended / suggested Vs a 62". I did some basic calculations and for the same engine and going from a two blade to a three blade the pitch should be closer to a 60". I do not want a climb prop - I want a cruse prop. =C2- Does anyone have a spread sheet program or a web site for doing calculation s? =C2- =C2- ANY IDEAS? =C2- Thanks Gaggle- =C2- ============ == ________________________________ Message 2 _____________________________________ Time: 06:38:26 AM PST US Subject: Re: RotaxEngines-List: CATTCO PROPS 3 Vs 2 From: FLYaDIVE Rick: Thank you for the post... As you say; is as I figured. They all play their games to make their common product exclusive. Thanks Rick, Barry On Thu, Jul 29, 2010 at 7:02 PM, Richard Girard wrote: > When it comes to prop carvers they are free to call out there measurements > as they choose. One carver may chose to measure at 75% of diameter, another > may choose 70%, one may choose to use a flat bottom airfoil section and use > the bottom as the reference plane while another might use the true chord of > the airfoil. > People I know who buy carved props generally have a collection and some are > reshaped more than once in the search for that perfect prop. > When I was building a LongEZ I bought a Carver prop that was supposed to be > just the ticket. It had been specially run through Don Bates' Prop Optimizer > program by Bates himself. I sold it to a friend who mounted it on his O-235 > powered Varieze. He liked it, it was faster than the prop he was running but > he got itchy for a little more performance and sent it back to Carver. The > company had changed hands and the new guys worked it over pretty good > because when Mike got it back his Varieze was instantly 40 MPH faster. Go > figure. > Craig Catto, Gary Hertzler, and others offer great products, but you may > have to work with them to get exactly what you want. Just put it down to > another aspect of your experiment. > > Rick Girard > > On Thu, Jul 29, 2010 at 4:32 PM, FLYaDIVE wrote: > >> Hello Gaggle: >> >> I am looking for some information on CATTCO PROPS. >> >> This is their web site: >> >> http://www.cattoprops.com/index.html >> >> Is anyone using their props? >> >> Info needed is: >> Three Blade Prop Vs Two Blade Prop. >> Is a 54" Pitch CATTCO equivalent to a 62" Pitch Sensinich? >> Why is there so much of a difference in pitch call-out between the two? >> I say this because a 54" is what was recommended / suggested Vs a 62". >> I did some basic calculations and for the same engine and going from a two >> blade to a three blade the pitch should be closer to a 60". >> I do not want a climb prop - I want a cruse prop. >> >> Does anyone have a spread sheet program or a web site for doing >> calculations? >> >> >> ANY IDEAS? >> >> Thanks Gaggle- >> >> Barry >> >> * >> >> ist" target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List >> tp://forums.matronics.com >> _blank">http://www.matronics.com/contribution >> * >> >> > * > > * > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.