Push tug - Page 4 - RC Groups
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Jul 20, 2010, 08:31 AM
GILL RC's Avatar
Well I managed to get back to do a bit of building.
Started the roof of the pilot house and made the rudders Friday night and installed the rudder linkages on Saturday morning. Now I have to make the kort nozzles and install them, also a second coat of polyester on the hull.
By using the mixes on the radio I will be able to move all the rudders at once or just the forward or just the rear.
The forward rudders are 40mm long and the rear rudders are 45mm long all are 65mm high. Just 0.062 styrene and a 5/32 brass rod with tabs soldered to it. They are filled with Plasticine resin.
Last edited by GILL RC; Jul 20, 2010 at 08:37 AM.
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Jul 20, 2010, 10:30 PM
Registered User
Hee hee, think you have enough rudders on that thing? (I know, I know, they're flanking rudders...)

Nice job!
Jul 21, 2010, 08:42 AM
GILL RC's Avatar
It should be a fun boat to operate. With twin throttles and 6 rudders. I figure that I can turn and ask how much change you would like.
But that is where the mixing on the radio comes in.
1. rear rudders (right stick, left right)
2. starboard engine (right stick, up/down)
3. port engine (left stick, up/down)
4 Flanking rudders (left stick, left right)
mix1- ch3 to ch2. give 1 stick control of both engines, mix off seperate control
mix2- ch1 to ch4. flanking goes oposite of rear rudders. mix off seperate
mix3- ch1 to ch4. flanking goes the same as rear rudders. mix off seperate
By the way I have 5 program mixes and 2 split mixes in the radio.
Jul 22, 2010, 08:49 AM
GILL RC's Avatar
Well I manamged to get about an hoours work in last night. Started labling and servo plugs and added the diodes to the 2 servos. I also started to set up the voltage regulator (drops 14.4 to 1 volt) for the radar and windshield wiper.
Jul 22, 2010, 03:33 PM
Give the dog a bone
Boatfox's Avatar
Originally Posted by Aerominded
Nice pics, towboatjoe! interesting barge- is it essentially an earth mover?
No kidding...an underwater bulldozer...LOL Seems like they could pin a spud barge and run the tug motors and flatten the underwater hills in about the same time.

Sorry Gill...looks very nice. Good execution of the plan. I have a tug with a similar amount and it runs off a single stick with a twisty top knob. Fwd/Rev = up/dwn, Strb/Port = left right, Any motor in reverse engages the flanking rudders, twisty knob = motor diferential (think tank style). All the controls ends up giving a very smooth operation. Of course you do need some practice time in to get it right.
Last edited by Boatfox; Jul 22, 2010 at 03:41 PM.
Jul 22, 2010, 04:51 PM
GILL RC's Avatar
Thanks. That truck looks good. I would have too r/c it. And I would have to remake the ramp I use for my Amphicar (too stepe). Or build a crane to put hte tug in the water. Then again the guys in the club would just say I'm getting to lazy to put the boat in the water. They say that about the Amphi. I just take it off the table set it on the ground and drive it to the water. I don't have too get out of my chair.
Jul 23, 2010, 08:30 AM
GILL RC's Avatar
I tred the radio last night and set the mixes. There are some wild rudder cominations. But all went smoothly. I hope to do a test run this Sunday at the all club regatta in South Orange. I won't have the Kort nozzels but it sould give me an idea as to the handling.
Last edited by GILL RC; Jul 23, 2010 at 08:45 AM.
Jul 23, 2010, 01:50 PM
Sea Dragon-Lover
Umi_Ryuzuki's Avatar
I think the rudders look confuzzled..
Maybe it's just me...

Looking good Gill.
Jul 24, 2010, 09:45 AM
"day ain't over yet-"
der kapitan's Avatar
Originally Posted by Umi_Ryuzuki
I think the rudders look confuzzled..
Maybe it's just me...
I'm thinking that it'll take a bit of practice to learn how to use all those rudders to best advantage---.
Jul 24, 2010, 10:44 AM
Registered User
Wow Gill, I got confused just reading your channel lineup, can't immagine actually operating it!!! lol.
Jul 25, 2010, 09:32 AM
River Rat
towboatjoe's Avatar
One trick I learned piloting the real ones is you can move the tow sideways by leaving the steering rudders straight, come forward on one engine while backing on the other and then turn the backing rudders the direction you want the tow to move. It's takes pratice to adjust the forward and reversing just right to move sideways, but hey, it's a nice challenge to pratice with.
Jul 27, 2010, 01:36 PM
GILL RC's Avatar
I did a test run on Sunday, All I can say is WOW! I have used mixing on models before, but this brings it too a whole new level.
Thanks towboatjoe I didn't know what I was doing and tried the differant configuations, to my suprise they worked. Just as you say I can make the boat move side ways. I had severel people try to find the bow thrusters. No there are none.
I do think that I am going to switch to the 60mm props, she does have a lot of power, but I like more.
I even did a recovery, That's the built in surprise. I have a channel set up that opens the rear hatch and then fires a tow line with a grapling hook. I have it set for about a 4 ft range and no more then 2 ft high. I just back up the the recovery, hold my #8 button and pull ch5. Hatch opens and hooks away. Right across the bow, slow forward and we were hooked. made for an easy tow in.
When I get the Bollard on I think that it wll work even beter as the line will come out across the bollard.
Jul 27, 2010, 01:56 PM
Grumpa Tom
Kmot's Avatar
Hahaha, cool!

I want to see a video of this!
Jul 27, 2010, 02:23 PM
GILL RC's Avatar
The funny thing only 1 guy inthe club was privy too my hook. When I fired it I closed the hatch and I had every one tring to figure out how I got the line on the the other boat.
Jul 28, 2010, 09:04 AM
GILL RC's Avatar
I took a couple pic's of the launcher last night. When I activate the servo rotates and pushes the hatch open, just before full rotation a cam on the launcher presses the trigger to release the slug. The slug is a 0.015 piano wire triple hook. With a balsa body and aluminum lock ring. This was done so that it would float and not catch the bottom. I have a range of about 4 ft and it goes about 2 ft high.
Last edited by GILL RC; Jul 28, 2010 at 09:26 AM.

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