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Warp Drive propeller blades

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ptiller(at)lolacars.com
Guest

Posted: Wed Apr 25, 2007 3:59 am Post subject: Warp Drive propeller blades

Hi,

I've searched this forum to see if I can find the answer but I can't.  



So, can anyone tell me why on the 62" Warp Drive ground adjustable propeller, tapered blades are recommended for a Rotax 912 and broad blades are recommended for a 912S and 914?



What is the issue with running a tapered blade on a 912S or a broad blade on a 912?



Yours,



'Newbie to Propeller design'

Visit -  www.EuropaOwners.org

grahamsingleton(at)btinte
Guest

Posted: Wed Apr 25, 2007 5:26 am Post subject: Warp Drive propeller blades

Phil

it's the power absorption. The tapered blade matches the power output of 

the 912, so allows the engine to develop enough rpm for the power needed 

for take oiff and climb..

912S & 914 need more blade area to absorb the power. Tapered blades will 

over rev too easily. Tapering a broad blade is maybe the cheap way to do 

it, they can use the same mould for either then cut to suit. My guess 

anyway.

Graham



flyingphil2 wrote:

 	  Quote: 	
		   

 

 Hi,

 I've searched this forum to see if I can find the answer but I can't.  

 

 So, can anyone tell me why on the 62" Warp Drive ground adjustable propeller, tapered blades are recommended for a Rotax 912 and broad blades are recommended for a 912S and 914?

 

 What is the issue with running a tapered blade on a 912S or a broad blade on a 912?

 

 Yours,

 

 'Newbie to Propeller design'

 

 

 

 

 

 

 Visit -  www.EuropaOwners.org

 

 

 

 

 

 

 

 

 


	


-- 

Graham Singleton



Tel: +441629820187

Mob: +447739582005

william(at)wrmills.plus.c
Guest

Posted: Thu Apr 26, 2007 8:53 pm Post subject: Warp Drive propeller blades

Your guess is correct, Graham.  I visited the Warp Drive stand at S n F last 

year and they confirmed they have only one mould for all blades.

Regards,

William

---

grahamsingleton(at)btinte
Guest

Posted: Fri Apr 27, 2007 8:38 am Post subject: Warp Drive propeller blades

It's amazing that these props work at all at the speeds we fly, they 

were designed and developed on Microlights.

Graham



William Mills wrote:

 	  Quote: 	
		   

 <william(at)wrmills.plus.com>

 

 Your guess is correct, Graham.  I visited the Warp Drive stand at S n F 

 last year and they confirmed they have only one mould for all blades.

 Regards,

 William

gcrowder2

Joined: 09 Jan 2006
Posts: 136
Location: Golden, Colorado USA

Posted: Fri Apr 27, 2007 9:02 am Post subject: Warp Drive propeller blades

Thats just it Graham, they DON'T work at all speeds we fly, only the lower speeds.

 I gained 20 mph on the top end and lost no climb from the WD by going to a custom designed

 fixed pitch prop.

  

                                                  Glenn



 	  Quote: 	
		   Date: Fri, 27 Apr 2007 17:39:23 +0100

 From: grahamsingleton(at)btinternet.com

 To: europa-list(at)matronics.com

 Subject: Re: Europa-List: Warp Drive propeller blades

 

 --> Europa-List message posted by: Graham Singleton <grahamsingleton(at)btinternet.com>

 

 It's amazing that these props work at all at the speeds we fly, they 

 were designed and developed on Microlights.

 Graham

 

 William Mills wrote:

 > --> Europa-List message posted by: "William Mills" 

 > <william(at)wrmills.plus.com>

 > 

 > Your guess is correct, Graham. I visited the Warp Drive stand at S n F 

 > last year and they confirmed they have only one mould for all blades.

 > Regards,

 > W========================> 

 

 


	


Get news, entertainment and everything you care about at Live.com. Check it out!  [quote][b]

jeff(at)rmmm.net
Guest

Posted: Fri Apr 27, 2007 10:23 am Post subject: Warp Drive propeller blades

I would be interested in knowing info on this prop Glenn,

Jeff

N128LJ / Gold Rush

On Apr 27, 2007, at 12:02 PM, glenn crowder wrote:



 	  Quote: 	
		      Thats just it Graham, they DON'T work at all speeds we fly, only 

 the lower speeds.

  I gained 20 mph on the top end and lost no climb from the WD by going 

 to a custom designed

  fixed pitch prop.

   

                                                   Glenn



 > Date: Fri, 27 Apr 2007 17:39:23 +0100

 > From: grahamsingleton(at)btinternet.com

 > To: europa-list(at)matronics.com

 > Subject: Re: Warp Drive propeller blades

 >

 > 

 <grahamsingleton(at)btinternet.com>

 >

 > It's amazing that these props work at all at the speeds we fly, they

 > were designed and developed on Microlights.

 > Graham

 >

 > William Mills wrote:

 > > 

 > > <william(at)wrmills.plus.com>

 > >

 > > Your guess is correct, Graham. I visited the Warp Drive stand at S 

 n F

 > > last year and they confirmed they have only one mould for all 

 blades.

 > > Regards,

 > > W========================>

 >

 >

 Get news, entertainment and everything you care about at Live.com. 

 Check it out!



Jeff Roberts
	


Eagleville Marketing Group / EMG

488 Beasley RD.

Eagleville TN 37060



615-355-7575 Office

615-406-8651 Cell

615-534-1082 Fax



Please note our name & address change.

gcrowder2

Joined: 09 Jan 2006
Posts: 136
Location: Golden, Colorado USA

Posted: Fri Apr 27, 2007 11:06 am Post subject: Warp Drive propeller blades

Hey Jeff - I am using a Catto fixed pitch 3 blade, 64 x 62 on my 125 hp EA81 powered

mono.  Here is an 8 page Vans Air Force forum thread that is discussing the Catto vs other

fixed pitch AND constant speed units.  The general consensus is that the Catto fixed

pitch is just as good on the RV as a Hartzell C/S unit and 20 lbs lighter for thousands less.

   I'm sure Craig would build a 912 or 914 optimized prop if a few people got interested.

http://www.vansairforce.com/community/showthread.php?t=12964&page=1&pp=10 

  There is a new design by Paul Lipps that Catto is also producing, pic below.  This

should be the direction of future prop design.  An article by Paul Lipps on his prop

design is here: 

http://www.batterson.net/EAA499/Issue77_8-13.pdf 

  This ones pricey for a fixed pitch because of the laminar flow prop airfoil is much

 harder to carve at $3200 US.  Plan on a long wait - up to a year.

I am ordering a Lipps design prop.  I hope to use the exact same profile as Lipps 

uses on his 0-235 powered Lancair as hp and prop rpm are the same.

                                                       Glenn

  	  Quote: 	
		    From: jeff(at)rmmm.net

Subject: Re: Warp Drive propeller blades

Date: Fri, 27 Apr 2007 13:21:20 -0500

To: europa-list(at)matronics.com

  .ExternalClass .EC_EmailQuote{margin-left:1pt;padding-left:4pt;border-left:#800000 2px solid;} I would be interested in knowing info on this prop Glenn,

Jeff

N128LJ / Gold Rush

On Apr 27, 2007, at 12:02 PM, glenn crowder wrote:

   Thats just it Graham, they DON'T work at all speeds we fly, only the lower speeds.

I gained 20 mph on the top end and lost no climb from the WD by going to a custom designed

fixed pitch prop.

                                                 Glenn

 	  Quote: 	
		   Date: Fri, 27 Apr 2007 17:39:23 +0100

 From: grahamsingleton(at)btinternet.com

 To: europa-list(at)matronics.com

 Subject: Re: Warp Drive propeller blades

 --> Europa-List message posted by: Graham Singleton <grahamsingleton(at)btinternet.com>

 It's amazing that these props work at all at the speeds we fly, they 

 were designed and developed on Microlights.

 Graham

 William Mills wrote:

 > --> Europa-List message posted by: 'William Mills' 

 > <william(at)wrmills.plus.com>

 > 

 > Your guess is correct, Graham. I visited the Warp Drive stand at S n F 

 > last year and they confirmed they have only one mould for all blades.

 > Regards,

 > W========================> 

Get news, entertainment and everything you care about at Live.com. Check it out! 

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

http://forums.matronics.com

Jeff Roberts

Eagleville Marketing Group / EMG

488 Beasley RD.

Eagleville TN 37060

615-355-7575 Office

615-406-8651 Cell

615-534-1082 Fax

Please note our name & addrsp;         - The Europa-List EmailEuropa-List" target=_blank>http://www.matronics.com/Navigator?Europa-List         - NEW MATRONICS WEB FORUMSsp;  --> h=====================

Explore the seven wonders of the world Learn more!

Paul_Lipps_prop.JPG

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mikenjulie.parkin(at)btop
Guest

Posted: Fri Apr 27, 2007 12:45 pm Post subject: Warp Drive propeller blades

Reminds me of the final instruction before entering  the examination room - RTFQ!!!   (Read the question)

  

 regards,

  

  

  

 



 [quote]    	  Quote: 	
		       <?fontfamily><?param Tahoma><?x-tad-bigger>  Thats just it Graham,      they DON'T work at all speeds we fly, only the lower speeds.<?/x-tad-bigger><?/fontfamily>

<?fontfamily><?param Tahoma><?x-tad-bigger>I      gained 20 mph on the top end and lost no climb from the WD by going to a      custom designed<?/x-tad-bigger><?/fontfamily>

<?fontfamily><?param Tahoma><?x-tad-bigger>fixed      pitch prop.<?/x-tad-bigger><?/fontfamily>

<?fontfamily><?param Tahoma><?x-tad-bigger> <?/x-tad-bigger><?/fontfamily>

<?fontfamily><?param Tahoma><?x-tad-bigger>                                                      Glenn

     <?/x-tad-bigger><?/fontfamily>

<?param Tahoma><?x-tad-bigger>>      It's amazing that these props work at all at the speeds we fly, they <?/x-tad-bigger><?/fontfamily>

<?fontfamily><?param Tahoma><?x-tad-bigger>>      were designed and developed on  Microlights.<?/x-tad-bigger><?/fontfamily>

<?fontfamily><?param Tahoma><?x-tad-bigger>>      Graham<?/x-tad-bigger><?/fontfamily>

<?fontfamily><?param Tahoma><?x-tad-bigger>

	
[b]

fklein(at)orcasonline.com
Guest

Posted: Fri Apr 27, 2007 3:24 pm Post subject: Warp Drive propeller blades

Mike...I don't get your drift...could you explain further?



Fred

A194



On Friday, April 27, 2007, at 01:44  PM, Mike Parkin wrote:



 	  Quote: 	
		    

 Reminds me of the final instruction before entering the examination 

 room - RTFQ!!!   (Read the question)

  

 regards,

grahamsingleton(at)btinte
Guest

Posted: Fri Apr 27, 2007 4:16 pm Post subject: Warp Drive propeller blades

Now isn't that a coincidence! Craig also makes one of the favourite EZ 

propellers, (3 blade). The other EZ favourite is Gary Hertzler's 2 blade 

"Silver Bullet" AFAIK both these guys use computer optimisation.

BTW waiting list for either is quite long. Market opportunity for 

someone. Wish I was a bit younger!

Graham



glenn crowder wrote:

 	  Quote: 	
		     Hey Jeff - I am using a Catto fixed pitch 3 blade, 64 x 62 on my 125 

 hp EA81 powered

 mono.  Here is an 8 page Vans Air Force forum thread that is discussing 

 the Catto vs other

 fixed pitch AND constant speed units.

grahamsingleton(at)btinte
Guest

Posted: Fri Apr 27, 2007 4:19 pm Post subject: Warp Drive propeller blades

Mike

you're getting as cryptique as me! Which question, preis or value?

Graham



Mike Parkin wrote:

 	  Quote: 	
		    

 Reminds me of the final instruction before entering the examination room 

 - RTFQ!!!   (Read the question)

  

 regards,

  

  

  

 

           Thats just it Graham, they DON'T work at all speeds we fly,

         only the lower speeds.

         I gained 20 mph on the top end and lost no climb from the WD by

         going to a custom designed

         fixed pitch prop.

          

                                                          Glenn

 

          > It's amazing that these props work at all at the speeds we

         fly, they

          > were designed and developed on Microlights.

          > Graham

 

 *

 

 

 *


	


-- 

Graham Singleton



Tel: +441629820187

Mob: +447739582005

mikenjulie.parkin(at)btop
Guest

Posted: Fri Apr 27, 2007 9:46 pm Post subject: Warp Drive propeller blades

Fred,

  

 It's my twisted mind - gets worse as I get  older.  What amused me is how a 'thread' is subtly changed with each  email.

  

 Graham wrote -

  " It's amazing that these props work at all  at the speeds we fly, they were designed and developed on Microlights.  "

         (---that  these props work at all    -------    AT the speeds we fly.)

 Glenn replied -

  " Thats just it Graham, they DON'T work at  all speeds we fly.....".

  

 I'm sorry, I blame my english teacher with the  'supersonic' board rubber (eraser in american).

  

 regards,

  

 Mike

  

 Do not archive.

 [quote]    

[b]

fklein(at)orcasonline.com
Guest

Posted: Sat Apr 28, 2007 12:59 pm Post subject: Warp Drive propeller blades

Regarding Craig Catto's props, in my email exchanges with him, Craig 

has been very leery of the Rotax hub due to the forces his 3 bladed 

wood props generate; he much prefers, at a minimum, a SAE 1 hub/bolt 

circle for adequate bearing.

Fred

A194

On Friday, April 27, 2007, at 05:16  PM, Graham Singleton wrote:

 	  Quote: 	

 <grahamsingleton(at)btinternet.com>

 Now isn't that a coincidence! Craig also makes one of the favourite EZ 

 propellers, (3 blade). The other EZ favourite is Gary Hertzler's 2 

 blade "Silver Bullet" AFAIK both these guys use computer optimisation.

 BTW waiting list for either is quite long. Market opportunity for 

 someone. Wish I was a bit younger!

 Graham

 glenn crowder wrote:

>   Hey Jeff - I am using a Catto fixed pitch 3 blade, 64 x 62 on my 

> 125 hp EA81 powered

> mono.  Here is an 8 page Vans Air Force forum thread that is 

> discussing the Catto vs other

> fixed pitch AND constant speed units.

gcrowder2

Joined: 09 Jan 2006
Posts: 136
Location: Golden, Colorado USA

Posted: Sun Apr 29, 2007 6:41 am Post subject: Warp Drive Propeller Blades

Hey Fred - Saber Manufacturing in Grandbury Texas has a line of adapters and hub

 extensions available that can mount anything to anything!  They will make anything you

 need.

  

 http://www.sabermfg.com/extensions.htm

  

                                             Glenn

  

  

 Regarding Craig Catto's props, in my email exchanges with him, Craig

has been very leery of the Rotax hub due to the forces his 3 bladed

wood props generate; he much prefers, at a minimum, a SAE 1 hub/bolt

circle for adequate bearing.

 Fred

A194 

Get news, entertainment and everything you care about at Live.com. Check it out!  [quote][b]

fklein(at)orcasonline.com
Guest

Posted: Sun Apr 29, 2007 8:18 am Post subject: Warp Drive Propeller Blades

Thanks Glenn...this info goes direct to my prop file...my only wish is 

that I would need the info today, rather in the fuzzy future.



Fred



Do Not Archive



On Sunday, April 29, 2007, at 07:40  AM, glenn crowder wrote:



 	  Quote: 	
		     Hey Fred - Saber Manufacturing in Grandbury Texas has a line of 

 adapters and hub

 extensions available that can mount anything to anything!  They will 

 make anything you

 need.

  

 http://www.sabermfg.com/extensions.htm

  

                                             Glenn

creightonious

Joined: 10 Mar 2007
Posts: 40

Posted: Mon Apr 30, 2007 7:21 am Post subject: Warp Drive propeller blades

Regarding Craig Catto's comments re: Rotax hub circle...

After reading Paul Lipps' short article it appears to me that the lack of racking and twisting and the reduced mass at the tips might go a long way toward minimizing the loads at the hub which give Craig the fantoids.

Creighton Smith

A036 Half done

Visit -  www.EuropaOwners.org

_________________
Creighton Smith
A 036

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