HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Nov 03, 2012, 10:10 AM
Registered User
ali26300's Avatar
Pakistan, Islamabad Capital Territory, Islamabad
Joined Jul 2012
11 Posts
Discussion
which props for O.S. .55 ax ?

I am new to rc world. I have OS 55 ax and don't know which propeller to use with it. My airplane is .40 seagull boomerang 2 trainer. Please help.
ali26300 is offline Find More Posts by ali26300
Last edited by ali26300; Nov 03, 2012 at 10:55 AM.
Reply With Quote
Sign up now
to remove ads between posts
Old Nov 03, 2012, 10:58 AM
Registered User
USA, IL, Benton
Joined Jan 2005
375 Posts
Do not pay any attention to the factory manual when it comes to props as anything over a 12x5 is just to keep the rpm and noise down and will not let the engine get into its powerband.
Your largest problem most likely will be prop clearance. If you can use a 12x5 then that is what I would recommend. The APC 12 1/4x 3 3/4 might also work. I also have used the 11x6, and 11x7 and 11x8 with success. You will be so overpowered anyway since the 55 would never need more than 1/2 throttle to fly your plane with authority. This is just my opinion from using the OS55 on many different planes.
Fred
Red Raider is online now Find More Posts by Red Raider
Reply With Quote
Old Nov 03, 2012, 09:19 PM
Registered User
kimchiyuk's Avatar
United States, NY, Eldred
Joined Jun 2012
520 Posts
On a .40 size plane, especially a tricycle gear, prop clearance will be your limiting factor. I personally have found that .40 size trainers do well on 11 X 5 to 11X8's. I say this not only as it seems a good match for speed and power, but 10 inch props sometimes don't give much authority as far as pull on a .40 trainer. Plus you'd be taching out a .55 with a 10 inch prop. As to a 12 inch prop, I highly doubt you'd have the ground clearance, especially if you fly off a grass strip. My advice, as many will agree, the best method is to buy several props and spend an afternoon trying them out. You are definately not limited by power. The right prop will make a world of difference. The good thing about props in this range is that they are cheap.
kimchiyuk is offline Find More Posts by kimchiyuk
Reply With Quote
Old Nov 04, 2012, 02:22 PM
Registered User
johngr's Avatar
Germany, NRW, Heiligenhaus
Joined Mar 2012
16 Posts
I have used a 11x6 prop with that engine.
or you an go 11x8 for top speed
Dont use 10 u ll have no enough power for a trainer.
johngr is offline Find More Posts by johngr
Reply With Quote
Old Nov 11, 2012, 04:03 PM
H&H
H&H Hobbies
H&H's Avatar
Old mystic CT U.S.A.
Joined Nov 2003
641 Posts
12x6 and 3" wheels
H&H is offline Find More Posts by H&H
Reply With Quote
Old Nov 11, 2012, 04:13 PM
Registered User
gene6029's Avatar
Wilson NC 27896
Joined Apr 2009
726 Posts
I have several OS 55AXs & am currently running an APC 11-7 on an Avistar trainer & like previously posted i installed larger wheels. On my fun fly stuff i run APC 13-4W & even have used 14-4W props. My Tower Kaos uses the 11-7 & is stupid fast.....Gene
gene6029 is offline Find More Posts by gene6029
Reply With Quote
Old Nov 11, 2012, 05:50 PM
use the 4s luke, use the 4s...
scrub monkey's Avatar
Australia, QLD, Booyal
Joined Sep 2012
848 Posts
Hi. I can't comment on the prop but I can on the plane. The 55 ax will be a heap of power for the boomerang. Most of the 60 size boomerangs at the club run the 55. Assuming this is supposed to be a trainer/first plane remember that the throttle is proportional for a reason and I am sure that your instructor will probably tell you the same thing.
scrub monkey is offline Find More Posts by scrub monkey
Reply With Quote
Old Nov 15, 2012, 08:11 PM
Registered User
Joined Sep 2012
14 Posts
not trying to highjack the thread, but i hate to start a new one when i have almost the same question.

i have a avistar elite with an os .46 ax2 engine. it came with a 12x5 prop, but i fly on a bumpy grassy field and keep banging the prop. i changed to a larger front wheel but im still hitting the prop. what would be a good prop for this plane/engine combo. im not terrible concerned with going really fast, i do want to make sure it has the thrust to climb vertically though, and i would like to gain a little ground clearance. i did try an 11x7.5, this gives me more clearance, seems to perform ok, im not seeing much of a difference between half throttle and full throttle though. any suggestions?
cedwards04 is offline Find More Posts by cedwards04
Reply With Quote
Old Nov 15, 2012, 08:18 PM
use the 4s luke, use the 4s...
scrub monkey's Avatar
Australia, QLD, Booyal
Joined Sep 2012
848 Posts
It should be running an 11x6 the 46ax. That is the most common one
scrub monkey is offline Find More Posts by scrub monkey
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold O.S. 55 ax abl w/tune muffler barrelgun Aircraft - Fuel - Engines and Accessories (FS/W) 1 Nov 03, 2012 10:49 AM
For Sale O.s. .55 max ax KenSue Aircraft - Fuel - Engines and Accessories (FS/W) 2 Aug 15, 2012 08:24 AM
For Sale O.S. .55 AX, With Tru Turn 2 1/4" Spinner (NEW Price!!!!!) KenSue Aircraft - Fuel - Engines and Accessories (FS/W) 0 Aug 10, 2012 07:32 AM
For Sale O.s. .55 max ax (reduced) KenSue Aircraft - Fuel - Engines and Accessories (FS/W) 0 Aug 07, 2012 09:41 AM
Help! Prop suggestions for O.S. .55? KenSue Pylon Racing 11 Jun 02, 2012 08:58 PM