Matronics Email Lists :: View topic - Does Size Matter (for Hartzell Propellers that is....) ?

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Does Size Matter (for Hartzell Propellers that is....) ?

Matronics Email Lists Forum Index -> RV8-List

View previous topic :: View next topic

Author Message

DONKEYVET(at)aol.com
Guest

Posted: Mon Nov 06, 2006 6:42 am Post subject: Does Size Matter (for Hartzell Propellers that is....) ?

Hi All,

  

 After much gut wretching and lost sleep I finally made a decision  about my last major purchase and decided to go with the Hartzel blended airfoil  2 blade propeller for my soon to be finished RV-8.

  

 Now I'm faced with one last (albeit minor) decision between the 72" and 74"  props. Any thoughts? The guys at Vans considered it literally a "flip a coin"  decision with little decernable difference between the two. Any other  thoughts out there? Noise, ground clearance (probably no biggie with a tail  dragger), ability to grind off tip of the longer one if damaged. I will be  greatfull for any opinions. Thanks!

  

 Dennis Flosi, N963DF  El Paso, TX 

  

 P.S. Are you happy with your Hartzell blended airfoil  prop?



  [quote][b]

- The Matronics RV8-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV8-List

BERFlyer(at)aol.com
Guest

Posted: Mon Nov 06, 2006 7:20 am Post subject: Does Size Matter (for Hartzell Propellers that is....) ?

Dennis,

 

      I went with the 74" prop.  Supposedly, a bit better performance.  Length is not a problem on the -8.

 

 Bruce Raymond

 RV-8

 N488RV  [quote][b]

- The Matronics RV8-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV8-List

december29(at)bellsouth.n
Guest

Posted: Mon Nov 06, 2006 7:44 am Post subject: Does Size Matter (for Hartzell Propellers that is....) ?

Gents,

   Finally, a thread that doesn't involve  "gapping" insults.  As we all have to admit, size does matter.  And to  follow Bruce's comment, luckily, length is not a problem for guys that fly the  -8.  It ain't no FlyBaby, ha ha.

   Didn't want to comment................just  felt I had to. 

  

 Later,

  

 John

 80002

  

 do not archive- my mom might find out I write stuff  like this.  ha, ha

 [quote]   ---

- The Matronics RV8-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV8-List

Tailgummer(at)aol.com
Guest

Posted: Mon Nov 06, 2006 7:57 am Post subject: Does Size Matter (for Hartzell Propellers that is....) ?

You may also wish to consider which Hartzell prop you would prefer to  have  IF you were to either start off with  electronic ignition...... or add it later.  There are EI/harmonic issues  that have been identified and evaluated by Hartzell (and  others) which have resulted in rpm/power restrictions and/or blade life  limitations.  No big deal, but something else to be aware of.

                                                                       John D.   RV8 N585JD 

  [quote][b]

- The Matronics RV8-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV8-List

rv8striker(at)hotmail.com
Guest

Posted: Mon Nov 06, 2006 8:37 am Post subject: Does Size Matter (for Hartzell Propellers that is....) ?

I went with the 74" Blended Airfoil. I have been very happy with it. I  would not worry about ground clearance, if you get the tail up that high you  have more to worry about than a ground strike of the prop. The blended airfoil  has a unique profile and slightly curved tips that, in my opinion, look  cool. Performance has been everything I expected.

  

 Steve Struyk

 RV-8, 75 Hrs

 St. Charles MO

 Getting ready for first annual condition inspection

 [quote]   ---

- The Matronics RV8-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV8-List

martin(at)gbonline.com
Guest

Posted: Tue Nov 07, 2006 6:44 pm Post subject: Does Size Matter (for Hartzell Propellers that is....) ?

Dennis.

 800 hours ago, I had the opportunity to test several different props on my  RV8 (IO=390).  I tested and still have a std hartzell constant speed (at)  76".  It gave superior climb  and standard cruise performance.

 I then was offered the opportunity by Aero Composites Inc.. to conduct an  exhaustive set of tests on their propellers. The tests were conducted on the  following dimensions,  76", 74" 72", 70", & 68".  All lengths  performed well, however here are some observations:

 76"  superior climb - ok cruise

 74"  excellent climb = excellent cruise

 72" good climb - excellent cruise

 70" ok climb - good cruise

 68 " ok climb - goodf cruise

  

 The Aero Composites propellers are on average 10 to 16 lbs lighter than the  Hartzell (std model) and 10 to 15mph faster than the Hartzell (I did not test  the new Hartzell blended airfoil, as it was not available at the time of  testing}

 [quote]   ---

- The Matronics RV8-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV8-List

Display posts from previous:

	Matronics Email Lists Forum Index -> RV8-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum