twin.80s- back to .67's

[jeff baham]

guys cmb purple head .80s and mac 13cc pipe set at 11 1/2 ,40% nitro in a outrigger , what props would be a good start , I have a pair h-38 from my .67 's and a pair of h-32 both are done by mark sholund.

 

[brett english]

H-48"s try them stock at first to make sure you can launch, also a pair of 1667"s cut down to 63mm with 5.5 COB, i will post a video later of how my twin 80 ran

with 63mm props..good luck!!

 

[Chris Wood]

1667 h-48 67 x 114 or cut down 1667 h-50 all good choices to start with. your limiting factory personally is 40% nitro. but all should work.. just have less cup.. might have to take down some dia to spool up better

 

[shoboat]

Jeff,

Start your set up with the H-32's first, and tune in the boat and motors.

Then I would work the H-38's next. When you get it running well and need more

try the H-48's next. Remember H-48's are just cut down 1667's in a different material.

Have Fun Testing,

Mark Sholund

 

[dwilfong]

I measured some new H50 last week that Ross had at speed master on the shelf. thy are 63mm now.

Thy might be a good prop for a 80 twin just cleaned up.

 

[jeff baham]

thanks guys i'll try these props first and see what happens.

 

[shoboat]

thanks guys i'll try these props first and see what happens.

Jeff,

Where is the video?

How did the propellers run?

Let Us Know Please,

Mark

 

[jeff baham]

sorry mark, but work is getting the best of me now , plus I have to put my motors together ,just got some parts from stu. trying to decide on building them myself or send them to someone.

 

[jeff baham]

well guys, i'm sticking with the .67 plus i'm running purple head motor which parts are hard to find , so I spoke to mr. stu and he had .67 parts so I brought them.

 

[jeff baham]

1667 h-48 67 x 114 or cut down 1667 h-50 all good choices to start with. your limiting factory personally is 40% nitro. but all should work.. just have less cup.. might have to take down some dia to spool up better

chis what % of fuel should I go with.

 

[brett english]

60% is what we run in the 80"s

 

[julianconde]

65 % what I used to run on mine worked great ;-)

 

[Chris Wood]

Ya 60 - 65 works well