Non-Oops version of a hull extension???

[Renny_D]

In car forums this would be refered to as bench racing so I am appologizing in advance if that's not ok here.

I've seen outboard boats with brackets that move the outboard as much as a foot back. I've seen and raced on sailboats where a sugar scoop was added to add waterline. Would it be possible to add a splashwell and hull extension aft of the transom and remount the outboard on that. Seems like a transom could be reinforced to take the additional load and maybe have taller knees to transfer the force to both the hull and gunwalls. You could even add floatation to the extension to support the weight of the outboard further aft. Could this work? Has this been done? Seems like this should be possible and less difficult than cutting the boat in half to make it longer. Probably not alot easier but easier.

Just wondering... I've already learned a ton on here and I learn more every day. Damn obsessive mind at work again with a little bit of info.

Thnks
Renny

 

[Labman]

Re: Non-Oops version of a hull extension???

I am doing something like that now. On the west coast of B.C., many of the older I/B are being converted to O/B's. Up here it has been referred to as a POD.
Basically you remove the engine/outdrive,repair the transom, (fill outdrive hole with plywood), fill all existing holes in transom,line inside of transom with 3/8" alum. plate 3m 5200 to transom,cover outside of transom, (same 3/8" plate and 5200), bolt to inside plate with 3/8 S.S. Carriage bolts, build and weld floatation tank (1/4"- 5/32"), Tank runs from just above bottom of transom up and out at an angle, so that it is 25"-30" back from transom and 25" to bottom,(must match angle*/rise* of transom),weld platform (5/32") to top of floatation pod, weld engine mount to edge of platform.

O.K. it's harder to explain, than to do!
I will be posting this project, once I have the Stringers done, having problems locating fiberglass supplies, at an acceptable cost. The two suppliers that I have found, want more for the Glass supplies, then the Alum. is worth.
My transom is 6'8"x44", the alum. is only a couple of hundred $.

 

[Renny_D]

Re: Non-Oops version of a hull extension???

I am doing something like that now. On the west coast of B.C., many of the older I/B are being converted to O/B's. Up here it has been referred to as a POD.
Basically you remove the engine/outdrive,repair the transom, (fill outdrive hole with plywood), fill all existing holes in transom,line inside of transom with 3/8" alum. plate 3m 5200 to transom,cover outside of transom, (same 3/8" plate and 5200), bolt to inside plate with 3/8 S.S. Carriage bolts, build and weld floatation tank (1/4"- 5/32"), Tank runs from just above bottom of transom up and out at an angle, so that it is 25"-30" back from transom and 25" to bottom,(must match angle*/rise* of transom),weld platform (5/32") to top of floatation pod, weld engine mount to edge of platform.

O.K. it's harder to explain, than to do!
I will be posting this project, once I have the Stringers done, having problems locating fiberglass supplies, at an acceptable cost. The two suppliers that I have found, want more for the Glass supplies, then the Alum. is worth.
My transom is 6'8"x44", the alum. is only a couple of hundred $.

Wow I'd love to see pictures of that. Any idea on how boats perform with this mod? Does this legally increase the length of the boat? Does your boat now have to be rated for HP because it is now an outboard boat? I wonder if folks are doing this for outboard boats as well?

Please post pics of yours or any boats you've seen this done to.

Thanks

Renny

 

[Labman]

Re: Non-Oops version of a hull extension???

Check out SportfishingB.C., there are Hourston,Grady Whites and others this has been done to. Mine is a 21' Sangstercraft, which with the pod will now be licensed as a 24'. One guy I know, Kelly did his Hourston 26' and now runs twin suzuki 140's and a 9.9 Yammie kicker.
Oops has been helping me track down the glass supplies I need, so hopefully I will get started putting her back together soon.
The boat was free to me, except the $600.00 for trailer tires, the $160.00 ferry fare to get it off of Vancouver Island and the 16hr. drive(one way) to get it home!

 

[Renny_D]

Re: Non-Oops version of a hull extension???

Check out SportfishingB.C., there are Hourston,Grady Whites and others this has been done to. Mine is a 21' Sangstercraft, which with the pod will now be licensed as a 24'. One guy I know, Kelly did his Hourston 26' and now runs twin suzuki 140's and a 9.9 Yammie kicker.
Oops has been helping me track down the glass supplies I need, so hopefully I will get started putting her back together soon.
The boat was free to me, except the $600.00 for trailer tires, the $160.00 ferry fare to get it off of Vancouver Island and the 16hr. drive(one way) to get it home!

Went to that site but couldn't find the pictures you spoke of. Please post of pics of yours when you are underway. I've searched google yesterday but didn't find much. BTW great price on the boat.

Thanks
Renny

 

[oops!]

Re: Non-Oops version of a hull extension???

the $160.00 ferry fare to get it off of Vancouver Island and the 16hr. drive(one way) to get it home!

you forgot the 30 bucks they soaked you for the sunshine breakfast of the ferry !......(i used to live on the island......beautful ride to take once....but man when you commute.....do you get sick of the ferries fast !

 

[oops!]

Re: Non-Oops version of a hull extension???

as far as the pod extension......yup....its done all the time......

some guys are even building the new transom farther foward than the plaining surface.......this puts the drive ahead of the last plaining surface and it stablizes the craft and eliminates the need for trim tabs......(kinda like a rib boat)

they say they jump outta the water super fast and run clean

 

[Labman]

Re: Non-Oops version of a hull extension???

Building this to use as a Charter boat, want to retire in Parksville/Qualicum area. Too many family members in Kelowna, Westbank,Rutland,Penticton. Fish it for a few years and buy the Kingfisher that I really want.

 

[oops!]

Re: Non-Oops version of a hull extension???

parksville qualicum is stunning !.....one of the best kept secrets of canada.

one of the major problems i had with the island is that you were allways cold....that breeze goes right thru you......(unless you hit shawannigan lake or the cowichan valley)......but i loved parks/quallicum......

ill have the glass info for you in about an hour or two.

 

[Labman]

Re: Non-Oops version of a hull extension???

Thank's oops, but you must have forgotten what the wind is like up here. Too long in the sunny Okanogan.

 

[Renny_D]

Re: Non-Oops version of a hull extension???

as far as the pod extension......yup....its done all the time......

some guys are even building the new transom farther foward than the plaining surface.......this puts the drive ahead of the last plaining surface and it stablizes the craft and eliminates the need for trim tabs......(kinda like a rib boat)

they say they jump outta the water super fast and run clean

That makes a lot of sense. Alot of my putting around in fun boats has been on overpowered dingys and those things don't dig at all they just go if you power them right, like instant on plane.

The main appeal for me would be to pick up a little more usable area inside the boat. My thought would be to cut down the original transom to about 14 inches in height. Have the new splashwell attach to the remaining transom but have it go back about two feet. then add another upper half of the transome about 6 inches back to create a bench seat back there with float boxes underneath out to either side of the outboard for additional floatation. They could be bolted about a quarter to half an inch above the bottom of the transom kinda like trim tabs. The front of the bench would overhang the old transom about 8 inches with some boxes for storage below the original transom I'd have some really high knees tying into the stringers. The boxes would also provide some additional structural strenght to help carry the loads forward. Enough fantasy boat building for now but this stuff really interests me and I'm one of those folks that can't leave well enough alone. I never met a vehicle that couldn't be improved or customized in some way.

Thanks for the edumication..
Renny

 

[zeagle]

Re: Non-Oops version of a hull extension???

Renny D, Check out classicmako.com search transome extension you will see some good pics. Look at the euro style extension it is sharp.

 

[getusummm]

Re: Non-Oops version of a hull extension???

I am in the process of closing in my trnasom and will be building and mounting my own outboard bracket. Just search for Master Marine. Let me fore warn you though, it is alot of work.

 

[erikgreen]

Re: Non-Oops version of a hull extension???

Yep, it's been done.

There's even a special type of drive system that's an add-on for boats that used to be outboard or I/O where a modified car engine is mounted in an add-on pod/hull section that hangs off the transom of the boat like a car top carrier would. It's a jet drive, and comes in diesel.

Extending boat hulls by adding more to one end or cutting the hull in half and putting in a new center section is something people have done for many years, since metal boats were invented (and some before that). It's only rare in small boats that are mass produced.

Go for it. I could see this being done in metal for a metal boat or fiberglass with an FRP boat. Assuming you made the new transom strong enough to handle the engine you wouldn't have to reinforce the old transom at all, just make sure the new hull section is strongly attached (with bolts).

You WOULD have to re-calculate the center of gravity, center of thrust(pressure) and hull weight and make sure it's all stable at the end.

Erik

 

[tmcalavy]

Re: Non-Oops version of a hull extension???

Interesting concept...reminds of "well" boats I have seen, relatively long and narrower than you would think, with a cut-out well in aways from the transom where the outboard is mounted. Guess it depends on where you want the rudder.

 

[jonesg]

Re: Non-Oops version of a hull extension???

In car forums this would be refered to as bench racing so I am appologizing in advance if that's not ok here.

I've seen outboard boats with brackets that move the outboard as much as a foot back. I've seen and raced on sailboats where a sugar scoop was added to add waterline. Would it be possible to add a splashwell and hull extension aft of the transom and remount the outboard on that. Seems like a transom could be reinforced to take the additional load and maybe have taller knees to transfer the force to both the hull and gunwalls. You could even add floatation to the extension to support the weight of the outboard further aft. Could this work? Has this been done? Seems like this should be possible and less difficult than cutting the boat in half to make it longer. Probably not alot easier but easier.
Renny

this sounds exactly what you're looking for ,

http://forums.iboats.com/showthread.php?t=306152

 

[Renny_D]

Re: Non-Oops version of a hull extension???

this sounds exactly what you're looking for ,

http://forums.iboats.com/showthread.php?t=306152

Thanks for the link that is even cooler than what I was thinking of. His video was awesome to.

I've had a great season with the boat but this coming year she will need a lot of work. Like that guy in the video I would love to go with a four stroke and I would also love to have built in tanks. Time to save my duckets I guess.

Thanks again for the feedback

Renny

 

[Huron Angler]

Re: Non-Oops version of a hull extension???

Renny D, Check out classicmako.com search transome extension you will see some good pics. Look at the euro style extension it is sharp.

http://www.classicmako.com/projects/castillo/

This one looks pretty sweet...perfect height for the prop it looks like.

Not sure how much that smaller extension would stabilize...not as much as one that ran the full beam of the transom and a little deeper.

I'd like to rig a tin starcraft islander or chieftain with dual outboards on a similar setup...someday

 

[Renny_D]

Re: Non-Oops version of a hull extension???

That looks interesting but the lack of additional boyancy would be an issue for me as my boat is already a little stern heavy with the batteries, fuel and big kicker on the stern.

Thanks for posting

Renny

 

[evildocrsx]

Re: Non-Oops version of a hull extension???

http://www.classicmako.com/projects/castillo/

This one looks pretty sweet...perfect height for the prop it looks like.

Not sure how much that smaller extension would stabilize...not as much as one that ran the full beam of the transom and a little deeper.

I'd like to rig a tin starcraft islander or chieftain with dual outboards on a similar setup...someday

There's an Islander for sale in my area for $900 boat/trailer no engine lol. I got mine for $500 with engine, but I want to do an outboard conversion on it. I've been told it throws off the balance of the boat. Don't know in which manner tho.