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Hunter Twin Build

Old 02-11-2009, 12:03 AM
  #51  
5150Cat
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Default RE: Hunter Twin Build

Ok I finally figured out that it's the bearing in the gearbox. I took it apart and cleaned it out but it's still all jacked up! Feels like the balls have serious flat spots in them or something. So I'm not going to screw with it anymore and will just ordered new bearings for the whole box.

My question is how to get that bearing off the gear shaft. It's right against the gear and it won't budge with a little prying. I just don't want to snap a tooth on the gear. And I don't want to torch the gear with major heat and make it brittle either.

Any ideas?
Old 02-11-2009, 01:49 PM
  #52  
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Default RE: Hunter Twin Build

Ok I'm taking Matt's advice and ordering a stock inline Zenoah from Redline Performance Motors. Nice guys and they seem to be ready to answer all the questions I throw at them. So that will be good for any future updates or upgrades.

Still have to look at a clutch though.....

Mike
Old 02-12-2009, 08:52 PM
  #53  
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Default RE: Hunter Twin Build

Please keep us posted on the build with plenty of pictures. phil's hunter was the reason i got into R/C boats. I also looked into doing this same build. Hunter with S6 drives but i was planning to use a pair of inline motors. (one inline powering each S6). I too thought about the drive showers to keep the drives cool. Good luck with the build! I hope all goes well for you!!
Old 02-12-2009, 10:05 PM
  #54  
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Default RE: Hunter Twin Build

Hey thanks 02f350! I will definitely keep you guys posted. Can't wait to build this thing! I'm going to order the engine soon and I'm still waiting on the hull to show up. Working on getting the drives and gear box smoothed out now.

Thanks for words though!

Mike
Old 02-19-2009, 11:04 PM
  #55  
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Default RE: Hunter Twin Build

Ok guys here's the next question. Exhaust.

I want to run a wet exhaust where the cooling water exits via the exhaust. But on my last conversation with Mitch from Quickdraw he highly discouraged this saying it would cut hp by at least a third. Has anyone else heard this?

If this isn't an option I'm thinking of having a small(1/4") channel thats welded to the top of the exhaust pipe that runs all the way down the top spine of the pipe and stops at the end where the exhaust exits. This would cool the pipe in addition the water would exit directly over the top of the pipe giving the same effect as if it were a wet exhaust system.

Ideas here?

Mike
Old 02-21-2009, 10:53 AM
  #56  
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Default RE: Hunter Twin Build

I'm no guru but if Mitch told you it would cut your power that much it's probably true. I know from my own experience that seemingly small changes to a pipe can have huge effects on power both good and bad.

That said I'm a nut about scale looks so I can see where your coming from but i don't think i could live with losing that much power. What if you run your outlets very close to where your pipes exit?
Old 02-21-2009, 03:13 PM
  #57  
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Default RE: Hunter Twin Build

I am with Paul on this one - Mitch is as good a source as any. But I gotsta have water at the exhaust too - If you run to a slightly larger pipe where you exit and inject water at that point you should not be restricting the gas flow. I will take some pics of the Canoes tips which is much the same.
Old 02-21-2009, 09:05 PM
  #58  
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Default RE: Hunter Twin Build

Yeah I definitely trust Mitch on stuff like that.

I'm definitely interested in seeing your setup Matt. My question is this then. If I have the water input into the pipe right at the end.....how do I keep water from running into the heads??? I remember having that problem earlier on one of my other hulls.

Mike
Old 02-22-2009, 06:23 AM
  #59  
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Default RE: Hunter Twin Build

You can see the water fitting on the bottom of the transom manifold below. I dont currently have the water lines routed - it is one of those jobs I have to get to before spring.

I have not had much an issue with water running up the pipe - particularly with aluminum hanson style pipes which also have the benifit of the header extending into the pipe. You should be aware when lifting the boat from the water that if you lift it transom first you are going to be more likely to drown your motor. But it is no different than flipping the boat if you do happen to get some water in there (though a little more work clearing an inline zenoah I will admit).

Old 02-22-2009, 05:29 PM
  #60  
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Default RE: Hunter Twin Build

Nice fittings Matt! Were those custom made I'm assuming?

Now given enough room I have an idea. If I have enough room how about making a bend in the pipe some. Say mount the pipes so they point about an inch above the exit point on the transom. Then have a 90 down and another 90 elbow back towards and out the transom. Mount the water outlet in the bottom of that 90 elbow so for any water to get back to the engines would involve it travelling straight up and back.....almost impossible.

My biggest concern is any change in the back pressure this would create. Obviously I could expand it and make it big enough that this would be limited as much as possible.....but still there will be some restriction.

It looks right in my head although probably sounds weird on paper......

Mike
Old 02-22-2009, 05:43 PM
  #61  
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Default RE: Hunter Twin Build

You will have plenty of room to work in the hunter. You could experiment with copper fittings to try some different options. Just make sure you use silver solder or braze the pieces together - plumbing solder WILL melt from the heat.

The chrome exhaust cross over pipe Phil did in his Hunter was all done in copper and then chromed.

You could also use a tuned pipe with a can after the cone (like a cooper pipe) which will definately keep water from flowing back up the exhaust.
Old 02-22-2009, 05:52 PM
  #62  
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Default RE: Hunter Twin Build

I think that's the route I'll go on the back end there. Have my buddy CNC me some really nice exhaust outlets for the rear of the hull with the correct fittings and then brass pipe my own custom deal back there. Do you think it's a good idea to connect them via a crossover pipe? Probably not going to hurt I wouldn't think......

Just sure does sound better when there's water bubbling and spitting out of that exhaust! )

Mike
Old 02-25-2009, 05:08 PM
  #63  
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Default RE: Hunter Twin Build

Sweet! Just got fedex confirmation my hull is on it's way! Not to bad since I ordered it on 2/9. Hopefully it shows up in one piece! I'll have pics when it arrives!

Mike
Old 02-25-2009, 05:12 PM
  #64  
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Default RE: Hunter Twin Build

That being the case it may just make the Feb deadline he promised - That is good news
Old 02-25-2009, 08:45 PM
  #65  
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Yes it is! Frankly I was scared to death and thinking I wouldn't see that hull until next Christmas. Glad he came through. I'm not sure how long it takes for Fed Ex to deliver a big honkin boat from one coast to the other but I'm assuming I'll have it next week? It just left Florida tonight.

Matt, I know I've asked you before, but where is the best place to get those sweet hinges and such I see on all the boats. For the top of the canopy for instance......

And what do you recommend for a nice flush fully working hatch closure type device? Some on here have used rare earth magnets. I guess if I got enough it would hold and then be good for a high speed spill in that it wouldn't rip the hatch locks out. What are your thoughts here?

Mike
Old 02-25-2009, 09:51 PM
  #66  
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Default RE: Hunter Twin Build

mike , did you get the drive thingy i sent. LMK robert
Old 02-25-2009, 10:12 PM
  #67  
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Default RE: Hunter Twin Build

Hi Robert,
Yes I did get the part. Swear I emailed you. Sorry if I didn't! But yes thank you! Can't wait to get those drives on the hull!

Mike
Old 02-27-2009, 11:41 AM
  #68  
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Default RE: Hunter Twin Build

Holy crap the FedEx tracking bill says the package is only 12lbs?!?!?! Does that sound right? For a 69" hull that seems light weight! But I'm used to the big cat hull so maybe thats why it seems light.

Curious what the end weight will be.....

Mike
Old 02-27-2009, 01:30 PM
  #69  
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Default RE: Hunter Twin Build

You might want to call Dr. Who and double check that one. Hull would weigh around 18-20 pounds - box would be another 10 pounds (with all the "found" packaging he will use).

If it is a 12 pound package then it should only be 36" long
Old 02-27-2009, 02:30 PM
  #70  
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Default RE: Hunter Twin Build

Phew. Just got confirmation. The box is 28lbs or something. So it should be good. Looks as though FedEx just f'd up on the details when they input the info.

Matt, do you know if they come straight from MHZ in Germany or do they get routed to the good dr first?

Can't hardley wait to get that hull. I've taken all next week off to go grab it from my buddies house and work on it. Hopefully I can get some good progress on it.

Mike
Old 03-05-2009, 05:05 PM
  #71  
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Default RE: Hunter Twin Build

hull come in yet?
Old 03-05-2009, 06:30 PM
  #72  
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Default RE: Hunter Twin Build

Hi guys!
Dang. After one missed attempt with FedEx and spending all day waiting around for them it finally showed up yesterday! Woohooooooooooo!!!!! Packing was marginal but none the less the boat showed up on time in a respectable amount of time and was in one piece.

And I know this is probably my own fault but holy crap this hull at $1000 makes me really really appreciate the work that HPR puts into his hulls. This hull is crap compared to his hulls. Granted I paid almost double the cost and in no means am I going to be unhappy with this hull but HPR's hull was ready to go showroom right out of the box. This hull has chips, scrapes and inconsistencies from the factory. I've attached those pics so you can see as well. Decent hull....will just take a bit more work to make it perfect!

Matt, question for you. How the hell did Phil cut out that top hatch to access the motors? That's such a fine line there I don't see how he did that and still maintained the strength. It was a nice touch and I plan on doing the same. I'm also ordering a scoop for the top. Think it needs it. And I'm a scoop guy......

Anyway here's pics! Now if I could hurry up and get my sisters wedding done with and family headed back home I can get started on this bad boy!

Also talked with a nice guy from Finland who has a very nice Hunter hull on YouTube.....TMIPredator if you want to check it out. He said the hull maximum speed is around 75kph. Anything past that he said it gets very skiddish. So that's cool. I can be completly happy with around 50mph as a top speed.

Here's the pics! Also some pics of the boat pond here in San Diego I checked out last weekend. Could be kind of funny breaking in the boat in that pond with all those gajillion sail boats! LOL!

Mike
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Old 03-05-2009, 06:58 PM
  #73  
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Default RE: Hunter Twin Build

Well 75kph translates to roughly 45 mph. You will be pushin that boat to it's limit. I think go for it and prove them wrong...
Old 03-05-2009, 08:07 PM
  #74  
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Default RE: Hunter Twin Build

I would like to know what are the servos on left and right for. They have rods going through the transom.
Old 03-05-2009, 08:43 PM
  #75  
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Default RE: Hunter Twin Build

Those servos are for the adjustable pitch on the drives. Makes it so you can adjust the drives via the radio while driving.

Mike

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