TURNS LEFT NOT RIGHT

Longest running airboat discussion on the internet.
Post Reply
BUSERDOG
Southern Airboat Member
Posts: 5
Joined: Sat Nov 09, 2019 1:22 pm

TURNS LEFT NOT RIGHT

Post by BUSERDOG » Sat Nov 09, 2019 1:30 pm

UNDER CETAIN CONDITIONS MY BOAT WILL NOT TURN RIGHT. IDLING AND ON STEP I HAVE NO ISSUES. HOWEVER SOMETIMES ON WATER UNDER MEDIUM OR LOW POWER I CAN NOT EVEN PUSH THE STICK FORWARD TO MAKE THE BOAT TURN RIGHT.
NO MUCH TO GO ON IN ALASKA SO ANY HELP IS APPRECIATED

User avatar
kwanjangnihm
Site Supporter - IV
Site Supporter - IV
Posts: 1983
Joined: Sat Mar 30, 2013 8:23 pm
Location: Bartow FL

Re: TURNS LEFT NOT RIGHT

Post by kwanjangnihm » Sat Nov 09, 2019 1:41 pm

Welcome to SA BUSERDOG :salute:

A bit more info is needed to give you advice on your issue.

Boat setup: hull size, motor, prop diameter, rudder size (height, width between rudders, inches from prop)

A photo from rear and side will help as well :thumbleft:
" I don't care who you are back in the world, you give away our position one more time, I'll bleed ya, real quiet. Leave ya here. Got that? "

BUSERDOG
Southern Airboat Member
Posts: 5
Joined: Sat Nov 09, 2019 1:22 pm

Re: TURNS LEFT NOT RIGHT

Post by BUSERDOG » Sat Nov 09, 2019 1:53 pm

20 FOOT WITH CAB 418 LS3 STROKER 2.55 REDUCTION
4 SENSENICH 82JR SERIES BLADES

User avatar
John Fenner
Southern Airboat Member
Posts: 2850
Joined: Tue Feb 14, 2012 12:26 pm
Location: Miami(Cuba) Fl.

Re: TURNS LEFT NOT RIGHT

Post by John Fenner » Sun Nov 10, 2019 5:48 am

Start with basics first, is engine and drive centerline plumb to boat centerline? Next, let the rudders loose from cable or drag link, run engine up, do they favor one position from neutral? Meaning is the rudder stick pushing back to where you have to keep pressure on it to make it go straight? If engine is plumb to boat, and the stick is doing as described, you need to trim tab the rudders so they stay neutral under power.
Now, 20' is a large craft, the powerplant and gear driven airscrew is very boastful, I hope the rudders you have are at least 5' tall and of a thick airfoil design with at least a 22/24" chord, otherwise you are fighting torque roll otherwise known as P factor.
I never finish anyth,,,.

SWAMPHUNTER45
Site Supporter - III
Site Supporter - III
Posts: 2904
Joined: Thu Nov 21, 2013 11:38 am
Location: Naturecoast, Florida

Re: TURNS LEFT NOT RIGHT

Post by SWAMPHUNTER45 » Sun Nov 10, 2019 6:32 am

Are you talking about a loss of turning ability in a low to medium power application while the hull is not on plane and when exposed to a wind.

If so it's fairly common to see the boat respond strong in one direction and weak in another based on prop rotation.

When your trying to power out to the weak turn side rather than get a steering response you seem to just sail toward what your trying to avoid faster?

Big boat, huge profile, poor steering ability and no keel. Your flying a Kite !

Don't take this as being a smart ass but running a big boat in wind is a lot like sailing. You learn to set the boat so it will tack to the desired route and keep your strong side turn as a recovery tool if things go wrong. It's hard going through narrow channels or creek beds in a +15mph wind with a large profile.

BUSERDOG
Southern Airboat Member
Posts: 5
Joined: Sat Nov 09, 2019 1:22 pm

Re: TURNS LEFT NOT RIGHT

Post by BUSERDOG » Sun Nov 10, 2019 8:58 pm

43AF1737-149B-43EE-897A-3AB86482B994.jpeg
394CC86C-045F-4CC1-8713-2D91882F77C7.jpeg
06F33CE5-A3F5-486E-BBF5-EB7068FAFBE1.jpeg
43AF1737-149B-43EE-897A-3AB86482B994.jpeg

BUSERDOG
Southern Airboat Member
Posts: 5
Joined: Sat Nov 09, 2019 1:22 pm

Re: TURNS LEFT NOT RIGHT

Post by BUSERDOG » Sun Nov 10, 2019 8:59 pm

I’m in Alaska, not down under !!!!!!

BUSERDOG
Southern Airboat Member
Posts: 5
Joined: Sat Nov 09, 2019 1:22 pm

Re: TURNS LEFT NOT RIGHT

Post by BUSERDOG » Sun Nov 10, 2019 9:03 pm

4’ tall rudders
31” apart

bkmail
Southern Airboat Member
Posts: 322
Joined: Sun Apr 11, 2010 5:30 am
Location: Palmer, Alaska
Contact:

Re: TURNS LEFT NOT RIGHT

Post by bkmail » Mon Nov 11, 2019 12:58 am

Mr Martin,
You have help. Give me a call.
232-6399
Brian



Sent from my iPhone using Tapatalk
https://www.bkmarineservices.com
https://m.facebook.com/BKMarineServices

502 BBC on a 18' Alumitech 2.68 Stinger box, w/84" 4 blade Whisper Tip Whirlwind blades.

Post Reply

Return to “Airboat Talk”