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Archive for July, 2011
Posted by zanek | Jul 23, 2011 @ 01:37 PM | 3,334 Views
Today and yesterday evening I was busy. I have glued on the bottom planks on the bottom of the v. It is really starting to look like a boat. I also cut off the little tabs on the frame that you use when glueing it with the spacing jig. Here are some pictures:



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Posted by zanek | Jul 17, 2011 @ 09:44 PM | 3,306 Views
Today I finished up the aluminum chassis I have been making for my micro SCT. I had it almost finished a few weeks ago, but I had problems with the gear mesh, and I didn't get around to fixing them until now. I was occupied with building the boat. I also added some sticky velcro to hold the battery on. The gear mesh problem was that I had drilled the motor mount holes a tad bit to far forward, and that caused the spur gear teeth the hit the flat part at the base of the pinion, where the set screw would be on a larger scale pinion. I managed to get it driving around, but it put a huge strain on the motor mount and the gear mesh was so tight that the battery lasted 1/3 of usual time and the motor smelled bad. So this time I managed to get that problem fixed. Instead of making new motor mount holes, which would have required making a whole new chassis. I couldn't just swap the motor side with the battery side because the center driveshaft it offset. The motor is lighter than the battery, so it has to be farther offset from the center to achieve a perfect left right weight balance. So it would have leaned heavily had I swapped the battery and motor. So what I did was take off the pinion and cut off the flat part, as it has no set screw (it is a friction fit). That way the pinion gear can move closer to the motor. Then I can get a good gear mesh without redoing the motor mounting area. I took it for a test drive around the house. It cornered beautifully, and it seemed to work well. On the first run the steering block fell off the chassis, but I re glued it and it seems to be holding. Here are some videos and pictures.


Battery mounted up



Chassis without top deck


Pinion before trimming


After pinion trimming


Gear mesh is much better


If you have some spare 1/10 Short course truck tires hanging around, they made a great stand.


Quick test to make sure the drivetrain is free


Driving around and then hitting camera


High speed cornering, filmed by my mom
Posted by zanek | Jul 17, 2011 @ 07:37 PM | 3,059 Views
Today I did some drilling sanding and gluing. I drilled some holes in the flat pieces of wood so the inside of the boat was all one air compartment. Then I sanded the burs off, made a spacing jig and started gluing the frame. While I am writing this the glue on the last bulkhead is drying. So exciting
Pics:



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Posted by zanek | Jul 16, 2011 @ 10:06 PM | 3,380 Views
Here is a video I shot of the Summit driving around on a track. It is running Mamba monster/2200kv motor/4s lipo. Video was shot by my mom while I drove.


Posted by zanek | Jul 16, 2011 @ 10:01 PM | 3,397 Views
I did some cutting, and I have the frame almost all cut out. Now I just need to hollow out the centers of the bulkheads to reduce weight, do some sanding, build a jig and then I can glue it! Right now it all fits together perfectly, but it has some splinters.



Posted by zanek | Jul 12, 2011 @ 08:04 PM | 4,404 Views
I am just finishing up cutting the pieces of wood for the main frame. I also made a stand for the boat. It is a simple 3 piece stand with a lip around the bottom so that it can be a parts tray. It fits the cardboard version well. Now all I need to do is add padding to the v shape that holds the boat so that it doesn't scratch the wooden version.



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Posted by zanek | Jul 12, 2011 @ 10:42 AM | 4,169 Views
This morning I started cutting out the pieces. I am using a jigsaw with a metal blade, because the wood blade cuts to fast for such thin wood. I am going to cut more pieces tonight and I should be finished cutting in a few days. Here is how far I have gotten:


Posted by zanek | Jul 11, 2011 @ 04:35 PM | 4,543 Views
Today I started working on the real one, out of wood. I started tracing the plans onto the wood and I am going to start cutting them out soon. I am using 3mm Birch plywood for the main frame and 1/32" birch plywood for the outer cover.


Posted by zanek | Jul 08, 2011 @ 10:23 PM | 4,635 Views
I finished the cardboard mockup. It looks pretty good for cardboard. I made it wil hot glue. It looks very sleek and fast. All of the parts still fit well after being scaled down. Here are the pics of the cardboard version. It is made in the same scale that the wooden version will be made in.

These are the pics of it as it goes together. They are pretty self explanatory.



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Posted by zanek | Jul 08, 2011 @ 03:29 PM | 4,473 Views
Cardboard transforms are all cut out. I will start building the cardboard version tonight. Should be done in a few days. And I will be sure to post plenty of pictures.


Posted by zanek | Jul 08, 2011 @ 01:28 PM | 4,693 Views
I have cut out the plans for the boat, and now I am making a cardboard mockup to make sure everything fits. I was not sure if it would because I scaled up some of the plans on one printer and the rest on another. I wanted to make sure they were the right size. Here are some pics of the cardboard build:


The top deck.


The bottom

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Posted by zanek | Jul 04, 2011 @ 07:22 PM | 4,403 Views
So I decided to build a 25" Mono hull RC boat over this summer. I got the plans off of modelpowerboats.com . Today I got some wood. I am going to be using 3mm birch ply for the main frame and .4mm birch ply for the skin. I will post more updates once I start cutting. Here is the wood and my plans:


The plans


The wood
Posted by zanek | Jul 04, 2011 @ 06:51 PM | 4,408 Views
I have been working on my chassis more over the last few days. It turns out that the sizing of my top plate was slightly off, so when it was on it would lift one of the wheels off the ground. I tried repositioning the holes with no results. After about an hour of messing with it I got annoyed and just put the stock plastic second deck back on. I will redo the aluminum top plate when I feel that I have the patience. I also need to lengthen the holes in the chassis for the screws that mount the motor. I didn't make them long enough so my gear mesh is too tight. Here are some pics:


Bottom view. The plastic washers protect the screw heads that hold the motor in place.


Side view. It sits low compared to the body, but I didn't lose any ground clearance. It just looks low here because I have my suspension lowered.

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