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All Forums >> RC Boats >> Speed - RC Gas Boats >> RE: Hunter Twin Build
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RE: Hunter Twin Build - 3/6/2009 9:37 PM   
specialk1



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Status: offline 		that is a nice set up

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RE: Hunter Twin Build - 3/6/2009 10:17 PM   
02f350psd



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Status: offline 		The servos to the far outside in matt's picture look too far outside to be for the drives (and a tad small as well). I think they may be for adjustable trim tabs

Sweet boat!! Keep the pics coming!!

< Message edited by 02f350psd -- 3/6/2009 10:18 PM >

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RE: Hunter Twin Build - 3/7/2009 7:26 AM   
Gerwin Brommer


 

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Status: offline 		Matt : about pic of your boat :
Is it finished in that pic ?
I mean : is the flex staying like that ?? No brass ?

BTW : Hunters can do over 75 km/h : http://www.youtube.com/watch?v=7Z5A1ll-Uds

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RE: Hunter Twin Build - 3/11/2009 3:47 AM   
5150Cat



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Status: offline 		So working on the hatch.....getting all the imperfections out and am thinking about hatch mounts. What are your guys feelings on the rare earth magnets?

Thinking that might be better than actual hatch locks. That way in case of a nasty rollover the hatch comes free vs ripping the locks out of the top. Also it's nice to have everything nice and flush!

Ideas?
Mike

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RE: Hunter Twin Build - 3/11/2009 8:23 AM   
Justaddwata



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Status: offline 		Gerwin - no the boat is not finished - I have the stuffing tubes out of the boat in that image - actually I have a lot of things out of that boat.

Mike - I personally like the idea of magnets - I have a few boats which use that means of securing the hatch and it works well. As you mention - hatch may come off rather than being torn off. I have read that they can be tricky bonding to the hull. I will be using them in a few boats in the future as I really have not found a cowl lock I love yet.

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RE: Hunter Twin Build - 3/11/2009 12:18 PM   
nieto1124


 

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Status: offline 		Mike , imperfections in the hatch? what is this you say? from a $1000.00 MH$ hull? how bad is it? pictures please.

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RE: Hunter Twin Build - 3/11/2009 1:43 PM   
Justaddwata



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quote:

ORIGINAL: nieto1124

Mike , imperfections in the hatch? what is this you say? from a $1000.00 MH$ hull? how bad is it? pictures please.

http://www.rcuniverse.com/forum/fb.asp?m=8547638

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RE: Hunter Twin Build - 3/11/2009 7:36 PM   
5150Cat



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Status: offline 		Neito,
I had posted some pics earlier of the defects on the hull. Nothing major but like you said I expected a bit more from a $1k boat. I know I'm pretty anal as well but I'm good with that. Right now my biggest issue is the hatch and hull weren't done as one. So the hull curves a bit and thatch doesn't. This means when the nose and tail of the hatch are smooth and flush with the f/r of the hull the center of the hatch sits below making a big efffffing drop. That to me looks like a$$! So thats where I'm at currently. Nightly going out to sand and get fiberglass all over my shop when this all should have been designed correctly.

Still happy with my purchase but Hans Peter is a fiberglass boat building God in my book! )

I'll get updated pics of my work uploaded for you guys this weekend.

Mike

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RE: Hunter Twin Build - 3/11/2009 10:02 PM   
5150Cat



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Status: offline 		You know.......some more thoughts on rare earth magnet setups. I see there being a couple of issues. First is mounting. But glassing them in or making some sort of bracket mounting system would be terribly difficult.

My main concern is the number, strength and size. Not enough pull and you risk losing your top on a windy day at 50mph. To many any you risk a high speed flip andripping out any attachment type method previously mentioned. Either way the wrong calculation and your screwed in both situations.

I'm thinking of this. Make a mount system that would break away. Something that won't move in any wind but if you crash and end upside down it would either pop off the hatch or break the mounting system leaving the majority if not all of your hatch in one piece allowing a reglue of the mount and running the next day. Vs having to order a whole new hatch cover.

Mike

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RE: Hunter Twin Build - 3/14/2009 10:36 PM   
5150Cat



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Status: offline 		Ok guys here are the latest pics. This week I cut out all the vents and the window area and finally figured out what the issues with the hatch were. The attached pics will explain better. I also wish I would have cut the windows out first as it really let me see what was going on.

The hatch is completely flat. The hull is rounded and curved on two planes. It curves from the sides and f/r. After some grinding of the center section I was able to get the front and rear of the hatch completely flush with the hull. The center now sits about 4mm's lower in the center. Looks like complete ass to me but maybe it won't be as noticable once I get some paint on it. I actually tried sanding some of the sides down as you can see in the pics but if have since stopped because it's never going to be close. So there's no sense in weakening that one point. I either had to pick of having the center/sides flush or the front and rear. I went for the aerodynamics of f/r vs the sides.

Anyway, next I'll be working on getting some lexan or PPG molded a bit and mounted up. Then it will be the engine rails. My engine assembly will probably get ordered in the next few weeks I think.

Has anyone used carbon fiber sheets for engine frame rails? It does flex a bit but I can't see tht being a bad thing neccessarily.....even if I was to brace the cf it would still be lighter and stronger than just regular wood stringers.

How about placement of the trim tabs. Anyone have any pointers on where to place these?

Mike

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RE: Hunter Twin Build - 3/15/2009 3:03 AM   
justintime2w8mac


 

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Status: offline 		Yea, I think its time to pass around a petition, everyone sign it and send it to Hanspeter to get him to build us some deep V's :-)

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RE: Hunter Twin Build - 3/15/2009 6:52 AM   
dicko



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Status: offline 		I have seen carbon fiber engine rails on an AC lazer, they work well. They were only a couple of mm thick too.

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RE: Hunter Twin Build - 3/15/2009 3:59 PM   
FlogginHarvey


 

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Status: offline 		Here is a thread on a MHZ Drambuie rebuild done by sickmodelpowerboats (not me). The workmanship by he and his brother is over the top. The rails are as solid as a rock. got me thinking...

http://www.rcuniverse.com/forum/m_8327357/anchors_8327357/mpage_1/key_drambuie/anchor/tm.htm#8327357

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RE: Hunter Twin Build - 3/24/2009 4:34 AM   
5150Cat



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Status: offline 		Engine is ordered! Should be here in a couple weeks. Went with a set of Tony's M5's from Warehouse Hobbies. Tony is just a good dude and made me a great deal on a clutch, inline mounts and engines.

Ordered a couple sheets of carbon fiber also. My question is do I use fiberglass cloth or cf cloth? And epoxy or something else? Never laid or connected carbon fiber to a hull.

Mike

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RE: Hunter Twin Build - 3/31/2009 2:39 PM   
justintime2w8mac


 

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Status: offline 		If you can find it, CF tape about 1" thick is nice but it seems a lot of people are just epoxying with no glass or CF, this seems risky to me. If you have a glass hull then the glass reinforcement might look better.

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RE: Hunter Twin Build - 4/7/2009 5:26 AM   
5150Cat



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Status: offline 		Hi guys,
Haven't forgotten the thread. Just waiting for parts!

Tony at WHH is working on getting my engines, mounts and clutch to me. Also just ordered some carbon fiber/kevlar weave and will get some engine rails this weekend.

Been working on sanding the hull to make it nicer. I'll get more pics soon!
Mike

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RE: Hunter Twin Build - 5/8/2009 3:05 PM   
5150Cat



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Status: offline 		Maaaan I'm a slacker! Sorry I haven't updated anything on here for a while. Been a hellish couple of months with everything going on. I'll try to get some pics posted this weekend.

Got the inline from Tony(who rocks to do business with by the way) and it's ready to go other than pipes. Still haven't made up my mind yet there. Buddy is cutting rails for me as we speak as well as the bulkhead reinforcement ply. The drives and tabs are mounted and I'm going to try to order some carbon/kevlar sheet this weekend also to get everything glassed in.

Pipes, fuel tank system and a handful of servos should be about all I need for major stuff.....

Pics soon,
Mike

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RE: Hunter Twin Build - 5/9/2009 3:43 PM   
FlogginHarvey


 

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Status: offline 		Welcome back!!! Looing forward to seeing your progress when you get pix posted.

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RE: Hunter Twin Build - 5/9/2009 7:37 PM   
5150Cat



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Status: offline 		Ok guys, sorry again for the delay. It's been a little crazy here with crap happening every weekend! But I'm finally getting back at it. Here are some pics to update where I'm at now.

Currently I have the boat on end with 14 cans of soup weighing down my transom ply while the epoxy dries. I also have just fabbed up the engine rails and temporarily hot glued them together to I can get all the heights right for the gear box and engine.

Just ordered the glass so that should be here this week so hopefully by next weekend I'll be adding in the rails, engine and gear box.

All of these pics are just initial and nothing is permanent yet as the plywood on the bulkhead isn't in yet. But it will give you guys an idea.

Mike

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RE: Hunter Twin Build - 5/9/2009 8:19 PM   
5150Cat



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Status: offline 		Here's pics of the engine and the rails in their early stages.

Mike

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RE: Hunter Twin Build - 5/21/2009 8:11 PM   
5150Cat



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Hey guys,
Here's some questions that I'd be up for some input on.

Collets.  They have the kind that clamp down on the flex shaft or the kind that you have to solder the flex shaft in.  Which does everyone prefer?

Also, anyone know where I can get a good radio box with a fully sealable screw on lid?  I don't want to use hatch tape.  I want something that has some thumb screws or something.  MH$ has one but I'll be damned if I'm paying $90 for one.  Rather try to make one.  I'm going to run a full 7.4v stick battery also so it has to be long enough to fit that in as well.

Mike



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RE: Hunter Twin Build - 5/21/2009 10:50 PM   
FlogginHarvey


 

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Status: offline 		Here's my $.02 worth...

I HAD the "solder" or super-duper-locktite setup on the Apache and swapped out what I could.  When i replaced the flex shaft I did not grind the end and it wobbled TERRIBLY...I know, I know....my fault...but this is a hobby and i am all about easy and good.  no problems with the clamp kind sense...  Just make sure it is TIGHT.   Go with the clamp down from this side.

The lid, WD200 (Werner) can custom make a lid with everything to YOUR specs and is GREAT to work with.  All you do is scuff is up and use epoxy & filler , 3M 5200, yadda yadda yadda to affix it to your box.  I saw a Mastons RC Epoxy box some place that looked sweet!  I laid mine up on my own and added the WD200 lid...it did not turn out quite liked I had hoped but not too bad for my first time laminating an RC Box...  The lid is AWESOME!  my box...not so awesome.

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RE: Hunter Twin Build - 5/27/2009 4:17 PM   
5150Cat



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Well the boats coming along nicely.  Next I need to order the exhaust and get that system all set up.  Then a couple servos and it's pretty much there......for the most part.

Looking at the hatch.  Would like to figure out a way to make a trick hinge system that opens from the front, hinges at the rear and has some shocks for that nice slow motion open effect.  That way my lids not getting kicked around or falling off the pier or anything.  One less thing to worry about.

Anybody have any experience with hinging a lid?  I'm trying to get my brain around mounting up the hinges without being able to mount them with the lid closed.  That could prove to be difficult and I want this thing perfect. 

Any suggestions?  I've been looking at the Robart #350 bomb door or retract door type hinge.  Think that would be the best bet.  Then glass/carbon it in for strength. 

This seems like a good idea until I think about flipping the boat at full speed off a wave.....then I see piece and parts floating all around in my head and in San Diego bay!  (  Maybe I should stick with my rare earth magnet idea?

Mike



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RE: Hunter Twin Build - 5/27/2009 5:35 PM   
Justaddwata



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Status: offline 		Hi Mike,

I can sympathize with your quandry. I like the idea of a smooth pivoting hatch over the idea of having to stow it somewhere whenever the motor is accessed. Though having the hatch looming large overhead while working on the boat is also an area of concern too.

Phil did a nice job with the hinges on the rear of the canoe though there is nothing in place to hold it up. Gas struts are a great idea but I have yet to find some light duty ones. On the smaller 65" canoe I also got from Phil early in the build he used a kitchen cabinet hinge which lifts the hatch away from the hull as it opens - this is a nice effect and it is spring loaded so it will stay open untill acted on with a little force. It does feel like a point of failure if the boat wipes out though.

The idea of using magnets is also a good one but not as clean. True they will breakaway if the boat wipes out but the hatch can still sustain damage in the wipeout regardless.

I personally would be looking further at the hinge options available to you. She is a big exotic vee - worthy of more than some magnets

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RE: Hunter Twin Build - 5/28/2009 4:42 AM   
5150Cat



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Status: offline 		Matt,
Yeah, I'm going to see what I can make happen with the hinge option.  Just seems like a better option.  I guess I'm thinking in my head also.....if I yard sale the boat at high speed it's going to be ugly all the way around.  Guess the friggin hatch is the least of my worries!   )  

Engineer buddy of mine had a good idea.  Instead of spring so it opens slow why not a servo actuated top?   )  He might be onto something here.  Extra weight but that would be easier and more reliable than the shock option.

Ok, I'm having another issue.  I ordered a fuel filler cnc machined piece from MH$.  I'm torn.  I think it looks the best on the side of the hatch just behind the windshield but this creates all sorts of issues.  So I'm leaning towards where Phil had his on the hull itself next to the hatch seam......that makes way more sense I guess but it just looks more race on the side of the hatch.........

Also adding some pics.  Ordered a intake for the roof.  Just to make it look a little different and a little more aggressive.  And to serve as that much more resistance when the water hits it when I flip it......     Think it looks pretty good.  Liked it more on the back than I did towards the front.

Again disregard the destroyed shop in the background......

Mike

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