Register Now

Dig it · 03-01-2005, 03:51 PM

I have a 1/5 Byron SU-26 with a OS91FX. I runnin a 15x6 APC on it now but I'd like more torque so I thought a 17x4 would do the trick. If anybody has experiance with this engine/prop combo, I'd like to hear what the results were.....

**scaleguy** · 03-01-2005, 10:31 PM

Ain't that a LOT of prop for a poor little 2 stroke? Seams a .91FS my swing that 17" but a little 2 stroke. My OS 1.08 2S is happy with a 15 x 6 or 16 x 6 but I think 17" would be too much for it.

AC/DC-patrice · 03-02-2005, 09:17 AM

i tryed a 16/6 and it was to much for that engine, the best prop i found was the 15/6

FaceDeAce · 03-24-2005, 09:34 PM

Anyone else here have the "thrusthp" program? I have found it really useful for assessing different props before going out and buying one.

The 17x4 has about a 10% higher load than the 15x6. I think it will work just fine - especially if you are not adverse to trimming it little to 16.5x4

If you are OK with the speed drop due to the lower pitch, then by all means Give it a try! It will have the desired effect.

treecutter · 03-24-2005, 09:45 PM

I would go with a 16x4wide APC. That will up the thrust for ya. I have used the wide props with great success on many engine.

Dig it · 03-24-2005, 09:57 PM

Claude: I'll have to give that program a try

Treecutter: I actually have a 16x4W in my grimmy hands,

AC/DC-patrice · 03-24-2005, 10:00 PM

i would go for a 16/4

FaceDeAce · 04-06-2005, 11:42 AM

Here is the link to the program. It works great for me.

http://freespace.virgin.net/barry.ho...e/goodies.html

Gary Maker · 04-06-2005, 04:15 PM

Quote:

Originally Posted by Dig it

I have a 1/5 Byron SU-26 with a OS91FX. I runnin a 15x6 APC on it now but I'd like more torque so I thought a 17x4 would do the trick. If anybody has experiance with this engine/prop combo, I'd like to hear what the results were.....

Every prop chart that I have says a 14"X 4 or 14"X6 is the range for a 90 two stroke engine. So according to this, even your 15"X6 is slightly too large! If your looking for better performance, just drop down slightly in pitch, to say a 15"X 4.

As Jims says, even a 1.08 2 stroke takes a max of 16"X 6. I would think that going to 17" anything would load your engine down too much!

x

03-01-2005, 03:51 PM	#1
Dig it RCC Expert Contributor I am: Dale I Join Date: Nov 2003 Location: Red Deer Feedback: 4 / 100% Posts: 841 Total Props: 0	What Prop?? Remove this ad - become a site supporter! I have a 1/5 Byron SU-26 with a OS91FX. I runnin a 15x6 APC on it now but I'd like more torque so I thought a 17x4 would do the trick. If anybody has experiance with this engine/prop combo, I'd like to hear what the results were..... __________________ Hey Buddy, thats a Kadet not an Extra!!!
	.

03-01-2005, 10:31 PM	#2
scaleguy IMAC/SA or NOTHING! ★ Site Supporter ★ I am: JimmyD Join Date: Nov 2002 Location: Mississauga On, SE Zone Radio of choice: JETI Duplex DS-24 # of RCs: ? Feedback: 75 / 100% Posts: 16,820 Total Props: 59	Ain't that a LOT of prop for a poor little 2 stroke? Seams a .91FS my swing that 17" but a little 2 stroke. My OS 1.08 2S is happy with a 15 x 6 or 16 x 6 but I think 17" would be too much for it. __________________ Jim Daly #IAmIMAC IMAC Sequence Committee Member MAAC #14323L IMAC #3678 *Windy you ask? I have Whitecaps on my Coffee, YOU be the Judge!*
	.

03-24-2005, 09:34 PM	#4
FaceDeAce RCC Supreme Contributor I am: Claude P. Join Date: Sep 2002 Location: Great Western Radio of choice: Futaba 7C and 9C, Prism 7x # of RCs: 20+ Feedback: 8 / 100% Posts: 2,092 Total Props: 1	Anyone else here have the "thrusthp" program? I have found it really useful for assessing different props before going out and buying one. The 17x4 has about a 10% higher load than the 15x6. I think it will work just fine - especially if you are not adverse to trimming it little to 16.5x4 If you are OK with the speed drop due to the lower pitch, then by all means Give it a try! It will have the desired effect. __________________ Work Hard, Play Harder
	.

03-24-2005, 09:57 PM	#6
Dig it RCC Expert Contributor I am: Dale I Join Date: Nov 2003 Location: Red Deer Feedback: 4 / 100% Posts: 841 Total Props: 0	Claude: I'll have to give that program a try Treecutter: I actually have a 16x4W in my grimmy hands, __________________ Hey Buddy, thats a Kadet not an Extra!!!
	.

04-06-2005, 11:42 AM	#8
FaceDeAce RCC Supreme Contributor I am: Claude P. Join Date: Sep 2002 Location: Great Western Radio of choice: Futaba 7C and 9C, Prism 7x # of RCs: 20+ Feedback: 8 / 100% Posts: 2,092 Total Props: 1	Here is the link to the program. It works great for me. http://freespace.virgin.net/barry.ho...e/goodies.html __________________ Work Hard, Play Harder
	.

03-02-2005, 09:17 AM	#3
AC/DC-patrice Guest Join Date: Jul 2004 Feedback: 0 / 0% Posts: 196 Total Props: 0	i tryed a 16/6 and it was to much for that engine, the best prop i found was the 15/6
	.

03-24-2005, 09:45 PM	#5
treecutter RCC Senior Contributor I am: Chris l Join Date: Apr 2003 Location: Regina, Sk Canada Feedback: 3 / 100% Posts: 553 Total Props: 0	I would go with a 16x4wide APC. That will up the thrust for ya. I have used the wide props with great success on many engine.
	.

03-24-2005, 10:00 PM	#7
AC/DC-patrice Guest Join Date: Jul 2004 Feedback: 0 / 0% Posts: 196 Total Props: 0	i would go for a 16/4
	.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

vBulletin Message

Cancel Changes

Register Now

Log-in