Interesting Twin Idea

[Marty Davis]

OK, here is a new idea for a twin. I know that there are many on this forum that LOVE TWINS.

How about this......

You build 2 single engine boats that are identical. They are 2 40's, 2 20's, 2 91's, 2 101's or whatever...

Both boats have the rear sponsons taped on with the good automotive trim tape. (I use taped on rear sponsons even on my 101 boat)

You rig boats and run them and get them running perfect. Same speed, same props, etc.

Now, you remove one of the rear sponsons on each boat and use the same double sided foam tape and attach the center sections of each boat together, after removing the sponson tubes. Now, you have a twin all except for new sponson tubes and a set of wider sponsons.

You will have to remove one rudder assy, or just the blade. You have both boats set up on the same frequency with 2 seperate radios so you have what most twin guys run anyway.

You now have a twin that is sorted before attaching together.

What do you think? B)

 

[TomMoorehouse]

why not just make 2 tubs sort of... both with center rear skis and also a single front "ski". Attach the 2 tubs with 2 tubes..... no sponsons needed.

 

[Joe Warren]

OK, here is a new idea for a twin. I know that there are many on this forum that LOVE TWINS.

How about this......

You build 2 single engine boats that are identical. They are 2 40's, 2 20's, 2 91's, 2 101's or whatever...

Both boats have the rear sponsons taped on with the good automotive trim tape. (I use taped on rear sponsons even on my 101 boat)

You rig boats and run them and get them running perfect. Same speed, same props, etc.

Now, you remove one of the rear sponsons on each boat and use the same double sided foam tape and attach the center sections of each boat together, after removing the sponson tubes. Now, you have a twin all except for new sponson tubes and a set of wider sponsons.

You will have to remove one rudder assy, or just the blade. You have both boats set up on the same frequency with 2 seperate radios so you have what most twin guys run anyway.

You now have a twin that is sorted before attaching together.

What do you think? B)

The heavier the boat the wider the front sponsons need to be. That same set of fronts (Single engine type & size) would not support the boat if you double in weight. (Motors & Fuel X 2) for the same set of fronts????????

 

[Joe Warren]

You need to get into the Twin class Marty!! Missing the Ride of a Life time as much as you love Hydro`s! Ralph can build you a new One.... Or there are many used ones coming up for sale. jw

 

[dwilfong]

David Caldwell has done this many years ago and it worked good. We are working on a new project and he told me about this set up.

David

 

[Marty Davis]

You need to get into the Twin class Marty!! Missing the Ride of a Life time as much as you love Hydro`s! Ralph can build you a new One.... Or there are many used ones coming up for sale. jw

Joe:

I have probably have had 20+ twins over the years. The longest I ever kept one was 6 weeks. Just not for me.... :blink:

 

[Marty Davis]

OK, here is a new idea for a twin. I know that there are many on this forum that LOVE TWINS.

How about this......

You build 2 single engine boats that are identical. They are 2 40's, 2 20's, 2 91's, 2 101's or whatever...

Both boats have the rear sponsons taped on with the good automotive trim tape. (I use taped on rear sponsons even on my 101 boat)

You rig boats and run them and get them running perfect. Same speed, same props, etc.

Now, you remove one of the rear sponsons on each boat and use the same double sided foam tape and attach the center sections of each boat together, after removing the sponson tubes. Now, you have a twin all except for new sponson tubes and a set of wider sponsons.

You will have to remove one rudder assy, or just the blade. You have both boats set up on the same frequency with 2 seperate radios so you have what most twin guys run anyway.

You now have a twin that is sorted before attaching together.

What do you think? B)

The heavier the boat the wider the front sponsons need to be. That same set of fronts (Single engine type & size) would not support the boat if you double in weight. (Motors & Fuel X 2) for the same set of fronts????????

Joe:

Any idea why I said new tubes and wider front sponsons?

 

[Joe Warren]

OK, here is a new idea for a twin. I know that there are many on this forum that LOVE TWINS.

How about this......

You build 2 single engine boats that are identical. They are 2 40's, 2 20's, 2 91's, 2 101's or whatever...

Both boats have the rear sponsons taped on with the good automotive trim tape. (I use taped on rear sponsons even on my 101 boat)

You rig boats and run them and get them running perfect. Same speed, same props, etc.

Now, you remove one of the rear sponsons on each boat and use the same double sided foam tape and attach the center sections of each boat together, after removing the sponson tubes. Now, you have a twin all except for new sponson tubes and a set of wider sponsons.

You will have to remove one rudder assy, or just the blade. You have both boats set up on the same frequency with 2 seperate radios so you have what most twin guys run anyway.

You now have a twin that is sorted before attaching together.

What do you think? B)

The heavier the boat the wider the front sponsons need to be. That same set of fronts (Single engine type & size) would not support the boat if you double in weight. (Motors & Fuel X 2) for the same set of fronts????????

Joe:

Any idea why I said new tubes and wider front sponsons?

Todays Modern 101-91 Nitro Twin weight is 15 lbs or less. You would be hard press to glue 2 boats together & stay light? The New design twins have newier benifits too, Higher ride heights, longer sponsons, Higher tub sides & Wide spread on tubes for bigger tanks. Many advantages come Race Day!!!!!!

 

[Piston1]

Maybe we can tie a couple of Twin 101s to make a Quad 101.

 

[Don Ferrette]

Maybe we can tie a couple of Twin 101s to make a Quad 101.

Only if you pay the fuel bill. :lol: :lol: :lol: :lol:

 

[Kevin Krogness]

Why not just luanch 2 boats on the same chanel at once instead of twin engines you have real twins :lol:

 

[LarryConrad]

Sure fire way to cause carnage and exactly the reason frequency boards are used with crystal based radio systems.

 

[mark holton jr]

why not run two motors in one tub, but use a small chain drive to drive one prop. set the motors on an angle like a v-twin B)

 

[Jeff Schindler]

I seriously thought about a triple 21, to meet the multiengine hydro displacement rules, but the 3 props would make the tub too wide. Anyone have ideas to make a legal boat without using big blocks?

My first thought was an inline triple, but the crank has me scratching my head. That, and all the bearings I would have to use to keep the crank volumes seperate. Maybe I could spline the cranks together on 3 seperate motors?

Marty's idea is one I'd be willing to try, 3 JAE tubs = 12 lb x 9.75" wide :huh:

 

[Mike Hughes]

I know a lot of people who want to put together smaller twins. If you are going to race it. Then you should be shooting for the 67+ on motors sizes for twin class. Anything less and you are going to find some real big holes to fall into. I put together a twin 7.5. It was one of those projects were I had all the parts sitting around. So I did it for fun. I do not race it. I run the 84 boat instead.

Mike

 

[Mark Poole ModVP]

Used to be a racer here in the southeast that made a triple engine rigger by using three 7.5cc K&B outboard powerheads. He took the cowl off and used the starter cone to start each engine (the flywheels facing forward in the tub)

 

[julianconde]

Mike i have a small Twin rigger and it could run very well with the 45 and 60 Hydros..

julian

 

[thomaselkins]

Power to weight the 67s have the upper hand, that's easy just weigh the engines and HP. as for the RR Joe its a dated design and glad to see its growing and maturing after all these years. as for weight well heavy boats seem to run well in race water and very very light (Marty) boats seem to be good for SAW unless you want to rebuild like Nascar all the time. Tested a different designed rear end yesterday on a rigger and found it worked as planed, we have been missing the boat just building the same thing that's been working for years. see ya at Brandon soon

 

[Tom Foley]

Power to weight the 67s have the upper hand, that's easy just weigh the engines and HP. as for the RR Joe its a dated design and glad to see its growing and maturing after all these years. as for weight well heavy boats seem to run well in race water and very very light (Marty) boats seem to be good for SAW unless you want to rebuild like Nascar all the time. Tested a different designed rear end yesterday on a rigger and found it worked as planed, we have been missing the boat just building the same thing that's been working for years. see ya at Brandon soon

I disagree , 80's are where its at on the power to weight deal imho , same case bearings , flywheel carb etc . Out of necessity I'm putting 90's in a boat designed for 80's , it won't be any faster but that's what i've got .

Marty , respectfully it's a waste of time , the two boat idea that is . just get both new motors running good and ride the platform for years . all good things unfortunately come to an end though .

 

[Mike Hughes]

Mike i have a small Twin rigger and it could run very well with the 45 and 60 Hydros..

julian

Run it against some 80-101 twins and see how well it does. Yes running a twin 21 in single 45 class is not a stretch. In a 60 class is not legal. Other than that, your money would be better spent else were. Unless it is just for fun project like I said earlier.

Mike