HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Nov 14, 2012, 06:42 AM
TRex 450,500,600, Dragonus II
hp88's Avatar
Australia, QLD, Brisbane
Joined Nov 2008
103 Posts
Question
Stinger flex shaft hole height from bottom of deep V

I have 57 inch Apache hull and just after some advice on what height to drill the holes for the flex shaft from the bottom of the transom. I am going to run twin stingers, any advice would be appreciated.
hp88 is offline Find More Posts by hp88
Reply With Quote
Sign up now
to remove ads between posts
Old Nov 14, 2012, 11:47 AM
Redneck Injuneer
bill34207's Avatar
Bradenton, Florida
Joined Aug 2007
6,056 Posts
Running as twins complicates the answer for this one.
Basically you will need to figure out the spacing between the two and wherever that falls in you will want them so that the bottom edge of the stinger base is about 1/8" above the bottom of the hull.
bill34207 is offline Find More Posts by bill34207
RCG Plus Member
Latest blog entry: Top Gun 2014
Reply With Quote
Old Nov 14, 2012, 12:20 PM
Registered User
wparsons's Avatar
Canada, ON, Markham
Joined Aug 2008
8,785 Posts
Twins in a V are a pain, especially if it's a deeper V.
wparsons is offline Find More Posts by wparsons
Reply With Quote
Old Nov 14, 2012, 05:47 PM
TRex 450,500,600, Dragonus II
hp88's Avatar
Australia, QLD, Brisbane
Joined Nov 2008
103 Posts
Quote:
Originally Posted by bill34207 View Post
Running as twins complicates the answer for this one.
Basically you will need to figure out the spacing between the two and wherever that falls in you will want them so that the bottom edge of the stinger base is about 1/8" above the bottom of the hull.
Cheers mate, Bill when you say bottom edge of stinger base, do you mean the mounting bracket or the actual tube part for the flex shaft.
hp88 is offline Find More Posts by hp88
Reply With Quote
Old Nov 14, 2012, 09:13 PM
Redneck Injuneer
bill34207's Avatar
Bradenton, Florida
Joined Aug 2007
6,056 Posts
The bracket.
If you drilled your stuffing tube hole 1/8 from the bottom of the hull, part of the base (bracket) would most likely be below the edge of the hull on the outward side.
If it were me, I'd draw the vertical center lines where the drives will be and place the bracket(s) so you have the clearance wanted from the hull bottom. Get it secured to the hull, then bolt the stinger on to use as a drilling jig for making the pilot hole(s) for the stuffing tube(s). But, that's just me.
bill34207 is offline Find More Posts by bill34207
RCG Plus Member
Latest blog entry: Top Gun 2014
Reply With Quote
Old Nov 15, 2012, 01:28 AM
TRex 450,500,600, Dragonus II
hp88's Avatar
Australia, QLD, Brisbane
Joined Nov 2008
103 Posts
Quote:
Originally Posted by bill34207 View Post
The bracket.
If you drilled your stuffing tube hole 1/8 from the bottom of the hull, part of the base (bracket) would most likely be below the edge of the hull on the outward side.
If it were me, I'd draw the vertical center lines where the drives will be and place the bracket(s) so you have the clearance wanted from the hull bottom. Get it secured to the hull, then bolt the stinger on to use as a drilling jig for making the pilot hole(s) for the stuffing tube(s). But, that's just me.
Cheers mate, appreciate your advice and love the idea of using the stinger as a jig for the holes. I am still think if I should go with the 1/4" full flex shaft or use 1/4 flex turned down shaft to 3/16" so i have a better range of props. I read that I need to keep the two props as close as possible to centre. All fun and games lol.
hp88 is offline Find More Posts by hp88
Reply With Quote
Old Nov 15, 2012, 06:33 AM
Registered User
wparsons's Avatar
Canada, ON, Markham
Joined Aug 2008
8,785 Posts
The further apart they are, the higher they'll sit and the more likely they are to come out of the water as the hull gets up on plane. IMO, if you need two motors I would gear them together into a single flex/prop over having two full drivelines on a V.
wparsons is offline Find More Posts by wparsons
Reply With Quote
Old Nov 15, 2012, 04:57 PM
TRex 450,500,600, Dragonus II
hp88's Avatar
Australia, QLD, Brisbane
Joined Nov 2008
103 Posts
Quote:
Originally Posted by wparsons View Post
The further apart they are, the higher they'll sit and the more likely they are to come out of the water as the hull gets up on plane. IMO, if you need two motors I would gear them together into a single flex/prop over having two full drivelines on a V.
Mate this is not something new for a setup on a Apache hull, if you do a search you will see most that setup a Apache hull or similar will use twin drives .

Here are some pics from a build to show what I am after,


hp88 is offline Find More Posts by hp88
Reply With Quote
Old Nov 15, 2012, 06:25 PM
Redneck Injuneer
bill34207's Avatar
Bradenton, Florida
Joined Aug 2007
6,056 Posts
Those aren't stingers. Those are struts.
bill34207 is offline Find More Posts by bill34207
RCG Plus Member
Latest blog entry: Top Gun 2014
Reply With Quote
Old Nov 15, 2012, 07:46 PM
Registered User
wparsons's Avatar
Canada, ON, Markham
Joined Aug 2008
8,785 Posts
To run stingers you're looking at the props being at least 3/8" higher I bet, depending on how big the base of the stingers are.

I still stand by my original thought though, look how far from the bottom of the V the props hubs are here, that means running bigger props than needed with less prop in the water so you're losing efficiency.
wparsons is offline Find More Posts by wparsons
Reply With Quote
Old Nov 15, 2012, 09:29 PM
TRex 450,500,600, Dragonus II
hp88's Avatar
Australia, QLD, Brisbane
Joined Nov 2008
103 Posts
Quote:
Originally Posted by bill34207 View Post
Those aren't stingers. Those are struts.
Yeh I know that mate, it was just an example.
hp88 is offline Find More Posts by hp88
Reply With Quote
Old Nov 16, 2012, 07:04 AM
Registered User
wparsons's Avatar
Canada, ON, Markham
Joined Aug 2008
8,785 Posts
If you have the stingers already, line them up to see just how far above the keel the prop hubs will be. The only way I can see you getting the props low enough is to mount the stingers on an angle so the base is parallel to the V angle instead of parallel to the deck. That could make adjusting them give weird reactions though.
wparsons is offline Find More Posts by wparsons
Reply With Quote
Old Nov 16, 2012, 07:24 AM
TRex 450,500,600, Dragonus II
hp88's Avatar
Australia, QLD, Brisbane
Joined Nov 2008
103 Posts
Here are some more Apache hulls setup with twins,

This is a beautiful boat



I would love a set of these

hp88 is offline Find More Posts by hp88
Reply With Quote
Old Nov 16, 2012, 08:45 AM
Redneck Injuneer
bill34207's Avatar
Bradenton, Florida
Joined Aug 2007
6,056 Posts
The scale Arneson (?) drives do look sweet but MHZ wants a small fortune for them.
bill34207 is offline Find More Posts by bill34207
RCG Plus Member
Latest blog entry: Top Gun 2014
Reply With Quote
Old Nov 16, 2012, 07:58 PM
TRex 450,500,600, Dragonus II
hp88's Avatar
Australia, QLD, Brisbane
Joined Nov 2008
103 Posts
Quote:
Originally Posted by bill34207 View Post
The scale Arneson (?) drives do look sweet but MHZ wants a small fortune for them.
Yeh they are just too expensive for what i want to do.
hp88 is offline Find More Posts by hp88
Last edited by hp88; Nov 22, 2012 at 01:54 AM.
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Question The holes of the bottom of BRAtt. JPCAT Scale Boats 5 Nov 13, 2012 06:52 PM
Discussion Distance between twin stingers on Deep Vee hp88 Racing Boats - Electric 2 Nov 02, 2012 05:07 AM
Sold dremal flex shaft chyorn Aircraft - General - Miscellaneous (FS/W) 5 May 02, 2012 01:14 PM
For Sale NIB Dremel 7360 Flex shaft tool kit. Ramboamt Aircraft - General - Miscellaneous (FS/W) 0 Apr 16, 2012 11:48 AM
For Sale Flex shafts gkamysz Boats (FS/W) 16 Mar 22, 2012 09:25 PM