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  #1  
Old 04-18-2017, 08:47 PM
pilot28906 pilot28906 is offline
 
Join Date: Apr 2006
Location: Murphy, NC
Posts: 357
Default HC-C2YR-1BF/F7666A-4 Prop?

Thought I would start a new thread for this question.

I have found this overhauled prop at a prop shop and I think this is the CS prop before the BA prop came out. Anyone using this prop and what are the pro's & con's? The price seems reasonable at $4500.

Thanks again. This site is fantastic.
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Murphy, NC
RV7
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  #2  
Old 04-18-2017, 10:48 PM
Mark Albery's Avatar
Mark Albery Mark Albery is offline
 
Join Date: Jul 2007
Location: Redwood City CA
Posts: 582
Default

I've used that prop in the past and it was very fast and efficient.
There are some RPM limitations. This is from the Van's web site:

The Hartzell Propeller Model HC-C2YR-1BF/F7666A-2 is satisfactory vibrationwise mounted on
Lycoming model O-360-A1A and similar engines rated at 180 HP at 2700 RPM and equipped
with Lightspeed Plasma II electronic ignition installed in Vanís Aircraft Model RV-8 and similar
single engine tractor aircraft with the following operating restrictions.
1. Avoid continuous operation between 2000 and 2250 RPM.
2. Operation above 2600 RPM is limited to takeoff. As soon as practical after takeoff the RPM
should be reduced to 2600 RPM or less.
3. The propeller blades are life limited and must be retired upon reaching 8700 hours.
The propeller diameter limits are 74 to 72 inches.

the -4 on the end means the diameter is 76 -4 = 72" so no further reduction is allowed. Those RPM restrictions apply for both electronic and standard magneto ignition.
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  #3  
Old 04-19-2017, 05:24 AM
Bob Martin's Avatar
Bob Martin Bob Martin is offline
 
Join Date: Jan 2005
Location: Richmond, Virginia
Posts: 1,004
Default Yes-Good Prop

What Mark said.....

I have flown my -6, 0-360 for 1100TT and my hangar mate has flown his -6, 0-360 with one for 450TT. We like the prop. Good value, especially in the used market.
One thing to watch when buying used props is history. If I am not mistaken a prop shop can straighten a blade and yellow tag it without disclosing any history. Also, if I am not mistaken a certified overhaul includes stripping the blades and re-milling them, then fresh paint. This process can only be done 3 times in the life of the blade. So it is best, if there is no damage to the blades that just an inspection and re-seal be done. Not everyone knows this information and the prop shops love overhauling them. And of course overhauling could be best as it allows a more through inspection, etc. Pretty sure an overhaul is about 2K and a reseal is about 800.
Not knowing the history, the 4500 is in the ballpark as a new BA prop is 7775 from Vans with no discount, shipping or spinner. The newer BA prop is said to be about 2knots faster.

Full disclosure: My hangar mate just purchased a new WW 74HRT at SNF. He will be selling his HC-C2YK-1BF, F666A-4 and shipping in about 7 weeks when the new WW arrives. 700hrs TT never overhauled but resealed in 2009 by H&H-Triad in NC. (KBUY). Prop comes complete with Van's spinner assembly as it is on the -6 now, painted green, with prop logs/history. He will be asking 4500.
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RV-6, 0-360 Hartzell C/S, Tip up, 1150+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
D100-KMD150-660-TT ADI2- AS air/oil seperator. Vetterman exhaust with turndown tips.
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  #4  
Old 04-19-2017, 06:47 AM
rv7charlie rv7charlie is online now
 
Join Date: May 2006
Location: Pocahontas MS
Posts: 2,380
Default

That max 2600 rpm restriction is interesting; I don't recall ever seeing that on a c/s prop. (Midrange restrictions are common.) Is that from the Hartzell TC?

If it's truly limited to 2600 rpm continuous, it means you won't be able to operate at 75% power at altitude. Not a big deal if you operate in 'economy cruise' all the time, but if you like to use the speed advantages of an RV.....
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  #5  
Old 04-19-2017, 05:23 PM
pilot28906 pilot28906 is offline
 
Join Date: Apr 2006
Location: Murphy, NC
Posts: 357
Default

Thanks for the info on the -4 meaning and info about the overhauls. I will get more info from the prop shop.
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Murphy, NC
RV7
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  #6  
Old 04-26-2017, 06:48 AM
RV8Squaz's Avatar
RV8Squaz RV8Squaz is offline
 
Join Date: Feb 2006
Location: Senoia, Georgia
Posts: 495
Default

Quote:
Originally Posted by Bob Martin View Post
What Mark said.....

I have flown my -6, 0-360 for 1100TT and my hangar mate has flown his -6, 0-360 with one for 450TT. We like the prop. Good value, especially in the used market.
One thing to watch when buying used props is history. If I am not mistaken a prop shop can straighten a blade and yellow tag it without disclosing any history. Also, if I am not mistaken a certified overhaul includes stripping the blades and re-milling them, then fresh paint. This process can only be done 3 times in the life of the blade. So it is best, if there is no damage to the blades that just an inspection and re-seal be done. Not everyone knows this information and the prop shops love overhauling them. And of course overhauling could be best as it allows a more through inspection, etc. Pretty sure an overhaul is about 2K and a reseal is about 800.
Not knowing the history, the 4500 is in the ballpark as a new BA prop is 7775 from Vans with no discount, shipping or spinner. The newer BA prop is said to be about 2knots faster.

Full disclosure: My hangar mate just purchased a new WW 74HRT at SNF. He will be selling his HC-C2YK-1BF, F666A-4 and shipping in about 7 weeks when the new WW arrives. 700hrs TT never overhauled but resealed in 2009 by H&H-Triad in NC. (KBUY). Prop comes complete with Van's spinner assembly as it is on the -6 now, painted green, with prop logs/history. He will be asking 4500.
What Bob and Mark said....

Prop shops can make the blades and hub look brand new and put a pretty little yellow tag on it and call it serviceable. While it may be serviceable, it may not be desirable. As Bob said, the tips are at the minimum diameter and the blades could be milled to their minimum thickness. In addition the hub (based on serial number) could be affected by an AD requiring repetitive check. That would be worth investigating. A prop hub affected by the AD is serviceable, but nearly worthless. Blades milled and cut to minimum dimensions are probably worth $1000-1500 each. Also, as Bob said, the new BA props are worth at least 2 knots more, but I bet it's closer to 4-5 knots.

I would buy new.
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  #7  
Old 08-12-2017, 11:18 AM
mikerkba mikerkba is offline
 
Join Date: Sep 2008
Location: Ely, Nevada
Posts: 134
Default Understanding the RPM restriction....

Do I read this correctly to mean that the RPM restrictions (particularly the 2600 RPM at cruise constraint) only apply if partnered with Lightspeed or other electronic ignition? Or does it apply to a dual magneto installation?

I hope I didnt miss an obvious answer in my previous reading. Thanks for considering.
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  #8  
Old 08-12-2017, 07:53 PM
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Mark Albery Mark Albery is offline
 
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Location: Redwood City CA
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Quote:
Originally Posted by mikerkba View Post
Do I read this correctly to mean that the RPM restrictions (particularly the 2600 RPM at cruise constraint) only apply if partnered with Lightspeed or other electronic ignition? Or does it apply to a dual magneto installation?

I hope I didnt miss an obvious answer in my previous reading. Thanks for considering.
My understanding is that the 2600 rpm restriction only applies to electronic ignition, but the continuous operation between 2000 and 2250 RPM applies to all 180HP O-360 models.

https://www.vansaircraft.com/pdf/Hartzell_c2yk.pdf
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  #9  
Old 08-13-2017, 12:13 AM
Canadian_JOY Canadian_JOY is offline
 
Join Date: Aug 2007
Location: Ontario, Canada
Posts: 1,424
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"My understanding is that the 2600 rpm restriction only applies to electronic ignition, but the continuous operation between 2000 and 2250 RPM applies to all 180HP O-360 models."

Just to clarify, these restrictions do not apply to counterweighted O-360's like the A1F6, if I'm reading my Hartzell Owner's Manual correctly.
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