---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Sat 07/30/05: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:41 AM - Re: 2 or 3 blade prop?? (Don Hall) 2. 10:57 AM - Re: 2 or 3 blade prop?? (Charlie England) 3. 01:04 PM - ACS EFIS? (Jeff Williams) ________________________________ Message 1 _____________________________________ Time: 04:41:24 AM PST US From: "Don Hall" Subject: RE: RV7-List: 2 or 3 blade prop?? --> RV7-List message posted by: "Don Hall" 3-blade is less noisy. I bet that's a more important consideration in Europe than here in the States. -----Original Message----- From: owner-rv7-list-server@matronics.com [mailto:owner-rv7-list-server@matronics.com] On Behalf Of Alf Olav Frog Subject: RV7-List: 2 or 3 blade prop?? --> RV7-List message posted by: Alf Olav Frog > > > Hello again! > > Thanks for all the inputs regarding the right hand seat! Great that there's a forum like this for us who are living outside of the "action"! > > Since I got so good response on my first issue, here's another choice I've to make: 2 or 3 blade prop? > > Ok, I know that the engine-choice is the first and biggest, but there I'm so far looking into different options.... what IS decided however, is a CS-prop. > > When the engine-choice is made, I'll check out the producers opinon regarding this, but what do you guys out there think?? > I was thinking that since I'm building a 7A, the distance to the ground from the propellertips would be slightly greater (better) with a 3 blade since this prop has a smaller diameter?? > Is there any big advantages or disadvantages with a 3 blade vs a 2 > blade? (expect for the price...) Is a 2 blade more efficient maybe?? > > > Best regards Alf Olav Frog > > ________________________________ Message 2 _____________________________________ Time: 10:57:05 AM PST US From: Charlie England Subject: Re: RV7-List: 2 or 3 blade prop?? --> RV7-List message posted by: Charlie England Alf Olav Frog wrote: >--> RV7-List message posted by: Alf Olav Frog > > > > >>Hello again! >> >>Thanks for all the inputs regarding the right hand seat! Great that there's a forum like this for us who are living outside of the "action"! >> >>Since I got so good response on my first issue, here's another choice I've to make: 2 or 3 blade prop? >> >>Ok, I know that the engine-choice is the first and biggest, but there I'm so far looking into different options.... what IS decided however, is a CS-prop. >> >>When the engine-choice is made, I'll check out the producers opinon regarding this, but what do you guys out there think?? >>I was thinking that since I'm building a 7A, the distance to the ground from the propellertips would be slightly greater (better) with a 3 blade since this prop has a smaller diameter?? >>Is there any big advantages or disadvantages with a 3 blade vs a 2 blade? (expect for the price...) >>Is a 2 blade more efficient maybe?? >> >> >> >>Best regards Alf Olav Frog >> 2 blades are usually cheaper & usually slightly faster. Someone will now jump in with info that their particular 3 blade is faster. ;-) 3 blades are usually smaller in diameter but there should be plenty of ground clearance anyway. 3 blades are usually a bit quieter & can be a bit smoother. Offsetting the quieter feature of the smaller diameter 3 blade is the fact that at low speeds the larger the diameter the more efficient (higher thrust per hp) the prop will be. Some pay the extra money for the 'cool' factor of the 3 blades. My opinion is that new modern airfoil 2 blades & 3 blades are close enough that the decision for me would come down to money. Charlie ________________________________ Message 3 _____________________________________ Time: 01:04:50 PM PST US From: Jeff Williams Subject: RV7-List: ACS EFIS? --> RV7-List message posted by: Jeff Williams Hey guys.. Does anyone know if ACS has a standalone EFIS or if they still only offer the engine management system? thanks Jeff