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Old Sep 22, 2012, 04:16 PM
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Build Log
1980 Outrigger with an Electric Outboard - Changed to Predator Outrigger w/outboard

I am going to start the outrigger build in the next post. First I want to thank anixs for the ESC. Change of plans, my girlfriends son said the boat that I was going to build for him and do a build log and use that ESC was "Dorky looking". So now we are going to buy him this boat and use that ESC in it. He likes this one a lot. It's from Hobby King.
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Old Sep 22, 2012, 04:21 PM
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1980 Outrigger with an Electric Outboard

Now for the outrigger build. I am going to build this boat for myself. I bought the plans on ebay. It's a 1980 design. I am going to change it from a nitro inboard to an electric outboard using the outboard in the 2nd picture, and make it like a smaller Spitfire Hydro from Prather see 3rd picture (except electric instead of nitro). Boat is giong to be 24" long. I will take photos as I build. For more on the outboard see this thread http://www.rcgroups.com/forums/showthread.php?t=1702142
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Last edited by Dave8888; Sep 22, 2012 at 06:41 PM.
Old Sep 22, 2012, 04:22 PM
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Bradenton, Florida
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That really looks more like a mono than a rigger. Is it going to be running one of the outboard legs?

Edit Never mind, shoulda waited for the 2nd post
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Old Sep 22, 2012, 08:27 PM
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If you need some small struts for that little hull I got some kicking around that need a new home.

Also got a wire drive!
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Old Sep 24, 2012, 08:04 PM
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Thanks Basstronics, I will keep that in mind. Made a full size paper mock-up of outrigger today. Plans are for a 26" in length outrigger. Mine is going to be 23 1/2". Plans have rear sponsons, but I don't think I am going to put those on. Also the sponson supports are 2 1/2" on the right side and 3" (in length) on the left on the plans. I am going to make them a little longer 3 1/2" and the same on both sides. The sponson supports for this outrigger are made of 1/4" plywood.
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Old Sep 25, 2012, 06:49 AM
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You're definitely going to want rear sponsons with an outboard on the back, you'll probably want to either extend or move them back so the trailing edge is closer to the prop.
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Old Sep 25, 2012, 09:35 AM
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Quote:
Originally Posted by wparsons View Post
You're definitely going to want rear sponsons with an outboard on the back, you'll probably want to either extend or move them back so the trailing edge is closer to the prop.
You mean like the Prather Spitfire? Why are rear sponsons so important if I use an outboard?
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Old Sep 25, 2012, 09:50 AM
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To keep the stern afloat...
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Old Sep 25, 2012, 12:18 PM
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^^ Exactly, it'll be hard to get the same lift at the transom as you would get with an inboard motor if you run an outboard.
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Old Sep 25, 2012, 03:52 PM
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Thanks guys. You're right, ( I wasn't thinking) the prop has a lot more weight to lift with an outboard. I am going to put on the rear sponsons. This is exactly why I started this build log was to get advice as I go.
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Old Sep 25, 2012, 04:25 PM
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Quote:
Originally Posted by wparsons View Post
You're definitely going to want rear sponsons with an outboard on the back, you'll probably want to either extend or move them back so the trailing edge is closer to the prop.
How far back should I extend the rear sponsons? If you look at the Prather Spitfire they extend out pretty far (first 3 pictures), but if you look at the JAE .21 outboard outrigger they don't extend out very much (4th picture).
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Old Sep 25, 2012, 06:56 PM
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They can almost to inline/even with the prop; if you go any further you will starve the prop for undisturbed water in the turns.
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Old Sep 28, 2012, 06:19 PM
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Quote:
Originally Posted by Kcal View Post
They can almost to inline/even with the prop; if you go any further you will starve the prop for undisturbed water in the turns.
If I make them almost even with prop, like the boat in the first picture, they will be put on like the second picture (back of boat is white with red background). There's not enough sponson glued to back of boat is there? I want to use these rear sponsons (on the plans) because I have the templates already.
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Old Sep 28, 2012, 07:26 PM
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Maybe add a gusset if your worried about them braking off, or move them up a little?
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Old Sep 28, 2012, 07:33 PM
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I was thinking of moving them up a little. What is a gusset?
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