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All Forums >> RC Airplanes >> RC Warbirds and Warplanes >> Prop Reduction drive
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Prop Reduction drive - 7/6/2002 5:17:56 AM   
Jack Devine


 

Posts: 314
Joined: 1/7/2002
From: Kirkland, WA, USA
Status: offline 		Ray: There is a guy in Everett that has a Ziroli Corsair with the Mick Reeves reduction Torquemaster on a G-62. He used the Moki adjustable three blade hub and a 24" three blade prop and could spin it at 5500 RPM. That puts the G-62 way up in RPM but he felt the combination was solid. The last time I spoke with him he was going to build a similar reduction drive and bolt it to a Zenoah GT-80. He felt a 28" prop was possible with that combination. I'll have to see if I can find him again. We had some great discussions on scale props and reduction units. If we could just come up with some efficient props we would make a giant step forward.
Jack Devine

(in reply to AirRayInc)
       Post #: 26

Props available..... - 7/7/2002 11:46:02 AM   
skerlock



Posts: 260
Joined: 3/13/2002
From: sandiego, CA,
Status: offline 		http://www.desertaircraft.com


Mejzli,
3-blade, Hollow Carbon Fiber Props
Prop Size(s) Price
16 x 11 $46.00
16.5 x 14 $50.00
18 x 10 $53.00
19 x 11n $56.00
20 x 10, 12 $59.00
21 x 11.5n $64.00
22 x10, 12 $69.00
23 x 14n $74.00
24 x 10, 12 $80.00
28 x 12 $139.00


Bolly props

3-blade Carbon Fiber Props
Prop Size(s) Price
16 x 13 $49.00
16.5 x 12 $49.00
18 x 10 $57.00
19 x 11 $57.00
20 x 12 $65.00
21 x13 $68.00
22 x12 $71.00


4-blade Carbon Fiber Props
Prop Size(s) Price
12 x 6 $37.00
12 x 6 extended $38.00
15.5 x 12.5 $53.00


Scott

(in reply to AirRayInc)
       Post #: 27

Saito 100 prop - 7/7/2002 6:06:04 PM   
RLeeds



Posts: 72
Joined: 12/13/2001
From: Knoxville, TN, USA
Status: offline 		Anyone have a recommendation on a four blade prop for a Saito 100?
Thanks, Bob

(in reply to AirRayInc)
       Post #: 28

4 Bladed props? - 7/7/2002 9:52:13 PM   
AirRayInc



Posts: 922
Joined: 12/30/2001
From: San Pedro, CA, USA
Status: offline 		No 4 blade bigger than a 15.5 x 12 from DA, I would think that with all the giant motors they sell they would have something.

Jack, if you are in touch with the guy building the reduction drive let me know how it works out, maybe there will be a way to make it work with the 5.9 and maybe even, dare I say, a 26inch four blade (as the mouth waters) I would lose it for sure, if I had a 26 inch 4 blade prop on my Bearcat, and was able to fly with it and have fun.

Wonder what size motor it would take to spin say a 26 x 12 at about 6k??? Hey you ultra giant scale guys might know the answer to that one. Maybe I could shoe horn whatever size motor it would take into the plane..................
ever the dreamer!

Ray

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(in reply to AirRayInc)
       Post #: 29

4 Bladed props? - 7/12/2002 5:44:20 AM   
fryfly



Posts: 592
Joined: 4/26/2002
From: Duncan, SC, USA
Status: offline 		Hey guys I fly a Ziroli with a 3w 70i with a 24/10 bolly prop the plane weighs 35 lbs. and will pull a good size loop with plenty of power to spare,on the ground the 2 blade prop pulls on a digital fish scale 25 lbs and like I said the plane flies with authority the 4 blade carbon fiber prop at 20/12 pitch pulls the same as the 2 blade haven't flown the 4 blade yet but plan on it this weekend.pulls the same rpm's too!

(in reply to AirRayInc)
       Post #: 30

4 BLADE SCREWS - 7/12/2002 7:44:30 AM   
SUPRA FLY


 

Posts: 24
Joined: 3/15/2002
From: VERRY SOUTH GEORGIA
Status: offline 		CHECK OUT HODGES HOBBIES . COM
HE FLIES A 20 FOOT B-29 WITH 4 ZDZ-80'S WITH 4 BLADERS THAT I BUILD UP FOR HIM. HE THINKS THEY LOOK MORE SCALE THIS WAY.

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       Post #: 31

4 Bladed props? - 7/12/2002 8:33:30 AM   
AirRayInc



Posts: 922
Joined: 12/30/2001
From: San Pedro, CA, USA
Status: offline 		Supra Fly,
can you build a 22in - 24in X 8 - 12 pitch narrow four blade set up?
If so how much, and what would you use to tie the blades together?

Checking all options,

Ray

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       Post #: 32

4 Bladed props? - 7/13/2002 3:23:35 AM   
SUPRA FLY


 

Posts: 24
Joined: 3/15/2002
From: VERRY SOUTH GEORGIA
Status: offline 		I start with two choice zingers and key them together and glue them with a very slow setting epoxy then put 4 dowels and 2 3/32 ply disk on them.
It takes about 2.5 hours just to get to glue part ,then they are cleaned up.
All of this is done with great care and precision on a vertical milling machine and jigs to keep alignment.
You just shape the tips ,balance paint and fly.

http://www.hodgeshobbies.com/index.htm

This is who I started making the props for.
Mac hodges can give you info on diameter and pitch for engine sizes.
As far as price, about $35.00 plus props for one 4 blade prop.
I might be able to get the props at a good price.
Zinger has a small selection of blade style

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       Post #: 33

RE: 4 Bladed props? - 11/6/2005 2:48:26 PM   
51-D GUY


 

Posts: 131
Joined: 12/28/2004
From: Franklin, LA, USA
Status: offline 		Tounge tied & twisted just an Earthbound misfit I

(in reply to Vince)
       Post #: 34

RE: 4 Bladed props? - 11/6/2005 3:03:22 PM   
51-D GUY


 

Posts: 131
Joined: 12/28/2004
From: Franklin, LA, USA
Status: offline 		My Friend, All you are likely to get from I. B. is the runaround & lies, I personaly would descourage ANYONE in dealing with them.

(in reply to Kregg)
       Post #: 35

RE: Hey Guys - 3/26/2006 12:19:09 AM   
51-D GUY


 

Posts: 131
Joined: 12/28/2004
From: Franklin, LA, USA
Status: offline 		Hello RonR ,

The byron in the picture, "Red Eraser" belongs to me now 51-D GUY ,
Ihad to change a lot of parts "with new ones" when i bought it from N.Y.
Not to mention repairing shipping damage It flies like a DREAM !
Currently has 3 flights at my field & 1 at Bomber Field TX.
Just thought you would like to know.


51-D GUY

(in reply to RonR)
       Post #: 36

RE: 4 Bladed props? - 3/26/2006 11:35:44 AM   
ifshnee-RCU


 

Posts: 132
Joined: 6/25/2003
From: Boca Raton, FL, USA
Status: offline 		Air:
Try soloprops.com
ifshnee

(in reply to AirRayInc)
       Post #: 37

RE: 4 Bladed props? - 3/30/2006 5:13:02 PM   
gjarossy


 

Posts: 18
Joined: 10/25/2003
From: Boise, ID, USA
Status: offline 		Hello all. I was reading this forum and thought that I would reply with some first hand info. Attached in my gallery is a picture of my Yellow P-47 with a Taurus 52 turning the Zinger 4-blade 22-6 during initial engine breakin and evaluation. I can say that on the ground, the combination pulls very hard. There is more than enough power for this model. (and no cowling cutouts). It also has custom scale exhaust. The prop "hub" has been scalloped by a friend with a CNC and I have since added the scale Hamilton hub. Just don't have any pics yet. I am very pleased with the scale looks and power of this setup. Yes, the prop is expensive, but at only $9 per spare blade, replacements may be cheaper than replacing an entire 2-blade (depending how many blades are damaged by a runway mishap). This aircraft will be finished in aluminum and should go in the air by this Fall.

< Message edited by gjarossy -- 3/30/2006 5:20:31 PM >

(in reply to AirRayInc)
       Post #: 38

RE: Prop Reduction drive - 3/30/2006 8:12:20 PM   
TLH101



Posts: 5513
Joined: 12/27/2001
From: Corpus Christi, TX, USA
Status: offline 		What RPM does your engine turn the prop? Pitch speed for a 6" prop at 6500 rpm is only about 37 mph.

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(in reply to gjarossy)
       Post #: 39

RE: Prop Reduction drive - 3/30/2006 10:16:41 PM   
impalacustom


 

Posts: 73
Joined: 3/19/2006
From: Lincoln, NE, USA
Status: offline 		I don't have a big enough plane for the use of these, yet I get bored and do some looking on the net and see what people are doing.