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Mar 12, 2012, 02:35 PM
Submarines, etc.
tsenecal's Avatar
how reluctant would you be to "updating" some of that 24 year old technology?
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Mar 13, 2012, 09:25 AM
SA-2 Samson
I guess I would be "relatively" reluctant.
I know the "new" radios dont work well in subs
and the "retro" speed controls are relatively bullet - proof.

what were you proposing to update ?
Mar 13, 2012, 12:09 PM
BabyBootLegger
sunworksco's Avatar
Dave,
You can pick up a 75MHz radio for a song now that most everyone is using 2.4GHz radios. And the brushless motors and ESCs from china are so cheap but good quality.
Mar 13, 2012, 02:32 PM
SA-2 Samson
But my trolling motors are high torque, low rpm, and waterproof, and will run for hours on a 7ah gel cell .

My propellers are large diameter and pitch, and do not need a 30k rpm motor.
Instead, they require the lower rpm and high torque of the trolling motor.

Mar 13, 2012, 03:42 PM
BabyBootLegger
sunworksco's Avatar
Your trolling motors,ESC and battery will work fine, but I like my boat to be much lighter when I'm lifting it out of the water. You will need a strong sling and a crew to heft the boat out of the water.
Just wanted to show alternatives for other boats.
Some low KV high-torque motors are made by eFlite.
I use a 245KV high-torque motor with a Castle/Hydra 120amp ESC in my boat.

http://www.e-fliterc.com/Products/De...odID=EFLM4160A

http://www.castlecreations.com/products/hydra.html

Giovanni
Mar 13, 2012, 04:50 PM
Submarines, etc.
tsenecal's Avatar
Quote:
Originally Posted by Rotorhead Dave
I guess I would be "relatively" reluctant.
I know the "new" radios dont work well in subs
and the "retro" speed controls are relatively bullet - proof.

what were you proposing to update ?
those mechanical speed controls are giving me nightmares.
Mar 15, 2012, 08:22 AM
SA-2 Samson
But - those mechanical speed controls are so - darn - bulletproof !!! :O

same for the 1989 vintage 75mhz radio gear ! ( more watts, too ! ) And I have already customized the radio transmitters with slide pots !
Mar 15, 2012, 09:48 AM
SA-2 Samson
We 'built' an 8 channel radio, with 8 proportional channels, by teaming up a pair of 4 channel units, on different 75mhz frequencies. Then we replaced most of the joysticks with linear slide potentiometers. This allows a servo to be moved to any positon and left there, as none of the slide pots are spring loaded in any way.
Mar 15, 2012, 11:44 AM
Submarines, etc.
tsenecal's Avatar
i don't remember when the gold certification happened, but your antique 75mhz radio might be illegal*.
Mar 16, 2012, 08:10 AM
SA-2 Samson
Hmmm. Good point !! :O

Guess I better check my transmitter cases and hope they have the "sticker of life" !! :O
Mar 17, 2012, 09:06 AM
SA-2 Samson
Saturday ! Time for more photos !
Mar 17, 2012, 09:08 AM
SA-2 Samson
few more shots. Note the new stainless steel prop shafts !
Mar 17, 2012, 01:59 PM
skypirate
Stainless shafts, nice. Red props, are they plastic, and do you intend to use them with this build or do intend to change them out at some point. It all appears to be going well, nice work.
Last edited by alligator; Mar 17, 2012 at 02:06 PM.
Mar 17, 2012, 06:02 PM
SA-2 Samson
large red plastic props are from Graupner. Large diameter & Pitch. Perfect for trolling motors.
I also have Scale props made from bronze. They will be polished up and used for display / show purposes only.
Mar 22, 2012, 08:49 AM
SA-2 Samson
I suppose I should paint the blood red props a dingy gun metal gray color, so they are not such an eyesore !


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