NTM
01-23-2008, 09:53 AM
Hi, I should have snapped more pictures as I built it, but I thought I'd throw a few pics up anyways.
I won't get a chance to run it for a few months yet, as our water's quite frozen around here !
The motor is a neu 1912-1y (830kv), esc is a hacker 77, batteries are a pair of 25c 10s 3700mah packs to be run in paralell, and the first prop on deck will be an octura 940/3. Once I get a few runs on it I'll switch to a detongued prather 235.
This is the closest it'll get to the water for a while. Hurry up spring !
http://img.photobucket.com/albums/v325/NTM95/IMG_1082.jpg
http://img.photobucket.com/albums/v325/NTM95/IMG_1085.jpg
http://img.photobucket.com/albums/v325/NTM95/IMG_1091.jpg
http://img.photobucket.com/albums/v325/NTM95/IMG_1090.jpg
I couldn't find squat for information while building this thing so I'll throw up a description of how I mounted the wing and cowl for others future reference.
If you look closely at the pics, you can see a deans female plug at the front, behind the cockpit, this is wired into the negative lead that runs to the esc. You just plug in the male jumper deans and it provides power to the esc and bec, an on/off switch basically.
There is a hole in the front of the cowling that engages that deans plug and there are neodynamium magnets epoxied in the cowling that line up with matching neo magnets epoxied in the hull, that are visible in the pics of the hull opened up.
This way there are no hold downs spoiling the look, it removes easily but stays put (the magnets are very strong) and the sub hatch (turbine exhaust) can be taped easily.
The idea was to be able to put the batteries in and tape up the hatch well ahead of time, and merely plug in the jumper, slip on the cowling and go once at the lake.
The wing is mounted with carbon rods that are epoxied through the deck of the boat, they extend right to the bottom of the hull for more strength and are epoxied there as well. They only stick above the deck of the boat 1/2" or so.
The wing uprights have holes drilled in their base that mate with the carbon dowels sticking out of the deck of the boat, a small hole is drilled horizontally through the wing upright and the dowel to allow a retaining pin to be slipped in. I just use small pieces of solder as I want them to shear easily in a blowover.
The horizontal wing I epoxied 10-32 du-bro brass inserts into. I then drilled the corresponding holes in the vertical uprights and retained the horizontal wing with 10-32 plastic bolts with small pieces of fuel tubing on each side.
I made small brackets to go on the plastic 10-32 bolt between the horizontal wing and vertical upright to attach the wing supports to. I drilled and tapped the strut mount for a pair of 4-40 cup style ball links. Made a couple of supports with 4-40 rod and clevises and there you go !
The wing is very secure under normal conditions but will seperate easily in a crash. Both the horizontal and vertical wings were injected with foam, so the wing assembly floats.
Cheers !
Nathan
I won't get a chance to run it for a few months yet, as our water's quite frozen around here !
The motor is a neu 1912-1y (830kv), esc is a hacker 77, batteries are a pair of 25c 10s 3700mah packs to be run in paralell, and the first prop on deck will be an octura 940/3. Once I get a few runs on it I'll switch to a detongued prather 235.
This is the closest it'll get to the water for a while. Hurry up spring !
http://img.photobucket.com/albums/v325/NTM95/IMG_1082.jpg
http://img.photobucket.com/albums/v325/NTM95/IMG_1085.jpg
http://img.photobucket.com/albums/v325/NTM95/IMG_1091.jpg
http://img.photobucket.com/albums/v325/NTM95/IMG_1090.jpg
I couldn't find squat for information while building this thing so I'll throw up a description of how I mounted the wing and cowl for others future reference.
If you look closely at the pics, you can see a deans female plug at the front, behind the cockpit, this is wired into the negative lead that runs to the esc. You just plug in the male jumper deans and it provides power to the esc and bec, an on/off switch basically.
There is a hole in the front of the cowling that engages that deans plug and there are neodynamium magnets epoxied in the cowling that line up with matching neo magnets epoxied in the hull, that are visible in the pics of the hull opened up.
This way there are no hold downs spoiling the look, it removes easily but stays put (the magnets are very strong) and the sub hatch (turbine exhaust) can be taped easily.
The idea was to be able to put the batteries in and tape up the hatch well ahead of time, and merely plug in the jumper, slip on the cowling and go once at the lake.
The wing is mounted with carbon rods that are epoxied through the deck of the boat, they extend right to the bottom of the hull for more strength and are epoxied there as well. They only stick above the deck of the boat 1/2" or so.
The wing uprights have holes drilled in their base that mate with the carbon dowels sticking out of the deck of the boat, a small hole is drilled horizontally through the wing upright and the dowel to allow a retaining pin to be slipped in. I just use small pieces of solder as I want them to shear easily in a blowover.
The horizontal wing I epoxied 10-32 du-bro brass inserts into. I then drilled the corresponding holes in the vertical uprights and retained the horizontal wing with 10-32 plastic bolts with small pieces of fuel tubing on each side.
I made small brackets to go on the plastic 10-32 bolt between the horizontal wing and vertical upright to attach the wing supports to. I drilled and tapped the strut mount for a pair of 4-40 cup style ball links. Made a couple of supports with 4-40 rod and clevises and there you go !
The wing is very secure under normal conditions but will seperate easily in a crash. Both the horizontal and vertical wings were injected with foam, so the wing assembly floats.
Cheers !
Nathan