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marco2236 · 04-18-2010, 10:19 AM

For my TF.60 Corsair I am going to run a 3 blade prop. My engine manual recommends a 12X6 2 blade, which will convert to what in a 3 blade?? 11X7? 11X8?

Im not looking for too much speed, just enough power to fly around casualy.

michel gravelle · 04-18-2010, 10:33 AM

Hi Mark

It is a well known fact that a three blad prop is NOT as efficient as a two blade . And add to the fact that a three blad prop gives you more of a chance to stall at low speeds , when throttleing down . ( I think I got that right )

Just a thought

Michel

wingburner · 04-18-2010, 10:42 AM

You will want to drop to a 10" diameter prop

or get a larger engine to turn the larger 3 blades.

**dean2287** · 04-18-2010, 11:05 AM

As per Zinger, drop the diameter by one and keep the pitch. So 12x6 coverts to 11x6 three blade.

Here's a link: http://www.zingerpropeller.com/_2_blade_.htm

marco2236 · 04-18-2010, 11:15 AM

OK. The plans on the kit also recommended 12X6 which is what I have. (see pics below) But this prop looks way small for the airframe??

I might just have to break down (and the piggy bank) and get a BIGGER engine

Oh and BTW, Im not going to run that old prop, its just one I had laying around.. its kinda damaged

**dean2287** · 04-18-2010, 11:22 AM

Looks fine to me. Just a large cowling. Remember that the prop is pulling the plane more than pushing it. If you look at the Gee Bee's they have props that are hardly any bigger diameter than the cowling. Should be fine.

marco2236 · 04-18-2010, 11:27 AM

Right on!! I will keep to a 12X6 2 blade. I have several new ones to choose from.

dean2287

wingburner · 04-18-2010, 11:34 AM

You can follow Zingers recommendations if you wish.

I have spent a lot of time and money on 3 blade props for engines from.90 glow to 150cc. It does not work by simply dropping an inch in diameter

Your best bet is to stick to 2 blade unless noise is an issue.Or you install a large enough engine that it'll power your plane with a 3 blade the same way your current engine will on a 2 blade.

Just saying

**dean2287** · 04-18-2010, 11:34 AM

No proplem (hahaha)

The front of the plane looks great BTW.

michel gravelle · 04-18-2010, 12:45 PM

Hi
Mark

You didn,t mention what engine you were going to put in it . That is also a facture . BTW , the two blad prop looks great and also the cowling .

Michel

04-18-2010, 10:19 AM	#1
marco2236 RCC Master Contributor I am: Marc A. Join Date: Jan 2007 Location: Cynthia Alberta (middle of no-where) Radio of choice: Spektrum DX9 # of RCs: 10+ Feedback: 3 / 100% Posts: 1,252 Total Props: 6	which prop?? Remove this ad - become a site supporter! For my TF.60 Corsair I am going to run a 3 blade prop. My engine manual recommends a 12X6 2 blade, which will convert to what in a 3 blade?? 11X7? 11X8? Im not looking for too much speed, just enough power to fly around casualy. __________________ Marc A. MAAC #81823... Valley Model Aeronautics Club.
	.

04-18-2010, 10:33 AM	#2
michel gravelle RCC Supreme Contributor I am: Michel G Join Date: Apr 2006 Location: Saint-Jerome Quebec Canada Feedback: 3 / 100% Posts: 3,316 Total Props: 12	Re: which prop?? Hi Mark It is a well known fact that a three blad prop is NOT as efficient as a two blade . And add to the fact that a three blad prop gives you more of a chance to stall at low speeds , when throttleing down . ( I think I got that right ) Just a thought Michel __________________ M.A.A.C. 75640 Hitec Aurora 9 LT-40 LT-60 Alpha-40 Tiger-60 (90 ) ARF P-51 40 TF-P51 Giant KIT TopFite P-51 Giant ARF X 3 Hanger 9 SpitFire 60 ARF X2 TopFlite Elder-40 ( on the board ) Aero Works 540 T -60 The Ground came up and hit my plane
	.

04-18-2010, 10:42 AM	#3
wingburner RCC Supreme Contributor I am: Jack D. Join Date: Oct 2002 Location: Beaverlodge AB Radio of choice: Futaba.18sz # of RCs: 15 Feedback: 19 / 100% Posts: 9,210 Total Props: 21	Re: which prop?? You will want to drop to a 10" diameter prop or get a larger engine to turn the larger 3 blades.
	.

04-18-2010, 11:05 AM	#4
dean2287 Level 3 Supporter ★ Site Supporter ★ I am: Dean M Join Date: Jul 2009 Location: Calgary Feedback: 19 / 100% Posts: 2,344 Total Props: 8	Re: which prop?? As per Zinger, drop the diameter by one and keep the pitch. So 12x6 coverts to 11x6 three blade. Here's a link: http://www.zingerpropeller.com/_2_blade_.htm __________________ Dean Myers MAAC 81138 CMPRA Calgary (www.cmpra.com) *fly2bfree*
	.

04-18-2010, 11:15 AM	#5
marco2236 RCC Master Contributor I am: Marc A. Join Date: Jan 2007 Location: Cynthia Alberta (middle of no-where) Radio of choice: Spektrum DX9 # of RCs: 10+ Feedback: 3 / 100% Posts: 1,252 Total Props: 6	Re: which prop?? OK. The plans on the kit also recommended 12X6 which is what I have. (see pics below) But this prop looks way small for the airframe?? I might just have to break down (and the piggy bank) and get a BIGGER engine Oh and BTW, Im not going to run that old prop, its just one I had laying around.. its kinda damaged Attached Thumbnails __________________ Marc A. MAAC #81823... Valley Model Aeronautics Club. Last edited by marco2236; 04-18-2010 at 11:17 AM.
	.

04-18-2010, 11:22 AM	#6
dean2287 Level 3 Supporter ★ Site Supporter ★ I am: Dean M Join Date: Jul 2009 Location: Calgary Feedback: 19 / 100% Posts: 2,344 Total Props: 8	Re: which prop?? Looks fine to me. Just a large cowling. Remember that the prop is pulling the plane more than pushing it. If you look at the Gee Bee's they have props that are hardly any bigger diameter than the cowling. Should be fine. __________________ Dean Myers MAAC 81138 CMPRA Calgary (www.cmpra.com) *fly2bfree*
	.

04-18-2010, 11:27 AM	#7
marco2236 RCC Master Contributor I am: Marc A. Join Date: Jan 2007 Location: Cynthia Alberta (middle of no-where) Radio of choice: Spektrum DX9 # of RCs: 10+ Feedback: 3 / 100% Posts: 1,252 Total Props: 6	Re: which prop?? Right on!! I will keep to a 12X6 2 blade. I have several new ones to choose from. dean2287 __________________ Marc A. MAAC #81823... Valley Model Aeronautics Club.
	.

04-18-2010, 11:34 AM	#8
wingburner RCC Supreme Contributor I am: Jack D. Join Date: Oct 2002 Location: Beaverlodge AB Radio of choice: Futaba.18sz # of RCs: 15 Feedback: 19 / 100% Posts: 9,210 Total Props: 21	Re: which prop?? You can follow Zingers recommendations if you wish. I have spent a lot of time and money on 3 blade props for engines from.90 glow to 150cc. It does not work by simply dropping an inch in diameter Your best bet is to stick to 2 blade unless noise is an issue.Or you install a large enough engine that it'll power your plane with a 3 blade the same way your current engine will on a 2 blade. Just saying
	.

04-18-2010, 11:34 AM	#9
dean2287 Level 3 Supporter ★ Site Supporter ★ I am: Dean M Join Date: Jul 2009 Location: Calgary Feedback: 19 / 100% Posts: 2,344 Total Props: 8	Re: which prop?? No proplem (hahaha) The front of the plane looks great BTW. __________________ Dean Myers MAAC 81138 CMPRA Calgary (www.cmpra.com) *fly2bfree*
	.

04-18-2010, 12:45 PM	#10
michel gravelle RCC Supreme Contributor I am: Michel G Join Date: Apr 2006 Location: Saint-Jerome Quebec Canada Feedback: 3 / 100% Posts: 3,316 Total Props: 12	Re: which prop?? Hi Mark You didn,t mention what engine you were going to put in it . That is also a facture . BTW , the two blad prop looks great and also the cowling . Michel __________________ M.A.A.C. 75640 Hitec Aurora 9 LT-40 LT-60 Alpha-40 Tiger-60 (90 ) ARF P-51 40 TF-P51 Giant KIT TopFite P-51 Giant ARF X 3 Hanger 9 SpitFire 60 ARF X2 TopFlite Elder-40 ( on the board ) Aero Works 540 T -60 The Ground came up and hit my plane
	.

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