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Home🌌Off Topics🌌Off Topics Main Discussion › need help creating a Sleeper RC decoy duck.
09-16-2009 02:06 AM  11 years ago
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Cope

rrVeteran

South Lake Tahoe CA

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need help creating a Sleeper RC decoy duck.
OK guys here's the situation. I was approached today by some one who wants me to build a RC Decoy duck. I said I'd do it even tho I know squat about RC boats, but heck how hard can it be right?

The budget is cheep, a couple hundred bucks from dude and what ever i decide to spend.

I have some old radios that i can donate to use but what I really need is some good boat sites, Boat specks, any and all ideas you folks can think of.

We want fast as the decoy is for a race. None of the other decoys will be RC so we should be a ringer. I checked the rules and they don't say any thing about RC.

I"m gonna go with electric power, so what range ESC and battery combo should I look at?

I have a bunch of 3 Cell lipos ranging from 1320 to 2500 Mah.

Did I say I want fast? I'll pay, What do i need?

I'm looking at water cooled ESCs and motors but like I said I know squat about RC boats.

The duck will be running in a creek so were looking at rough water conditions.

I'm thinking a deep V duck?

I'm gonna place the electronics battery and motor inside the decoy to maintain a stock look on top but the bottom i want pure race boat.

Please any and all suggestions are welcome.

I get the duck in a day or so and I'll post pictures then.

Thanks for the time and help.
Fear is the little death,The mind killer. I will allow my fear to pass through me.Only I will remain
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09-16-2009 02:29 AM  11 years ago
midwestpilot

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Crystal Lake, IL

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i made one before
... it wont work for the ducks though.. they were to smart...

Get a plastic decoy..
cut open the back from just behind the neck to the tail
get running gear for a boat of similar size
If you look at a boat you will figure it out..

As for power that will depend on speed controller and stuff... I did it back in the 80's and I used a small brushed motor and a couple of D batteries to power it up.. this is a duck afterall and if it hauls ass across the lake it would not look real.

I also cut the head off and conected it to the rudder so he looked where he was going and also cut open his mouth and hooked it up to the throttle with a string.. the mouth would fall open and if you pull the sting it would close. the throttle which was nothing more than a servo pushing on a momentary switch... so it was either on or off.. sounds crude.. but it worked great

it is old and not kept up.. but it could live again
In life there is no spacebar!

Rich Erikson AMA 6175
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09-16-2009 03:07 AM  11 years ago
Cope

rrVeteran

South Lake Tahoe CA

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Ok that my friend is EXACTLY what I"m looking for!!!!!

Could you please get me some close up shots of how the prop shaft exits the hull? The more picks the better I'm a slow learner.

What type of sleeve did you mount the rotating head on? I never thought of this but man what a attention getter!!!!!

What would you do different if you re built it?

You are the man, Thank you.

Folks Please how do we make this sucker scream?

Thanks a million.
Fear is the little death,The mind killer. I will allow my fear to pass through me.Only I will remain
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09-16-2009 04:07 AM  11 years ago
S76 Mech

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Hatboro, Pa.

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midwestpilot
Thats pretty cool!
Gaui Greatness X7, X5, NX4, X3
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09-16-2009 03:15 PM  11 years ago
svenaslav

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Kalamazoo, MI

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09-16-2009 03:30 PM  11 years ago
svenaslav

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Kalamazoo, MI

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09-16-2009 04:07 PM  11 years ago
midwestpilot

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Crystal Lake, IL

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I built this thing a long time ago
long before I had any real building skills... If I were to do it over I would build it cleaner.. a nice servo tray instead of a hacked up one.. better motor mount.. all for looks though as it worked well as it was.

I will take more pics for you...

Nothing to complicated about the prop shaft and suport tubes... just make sure you glue them in water tight and that the tube extend up into the body well above the water level so water just does not pour in. Now I did not build a speed demond.. so I am sure to get it to haul ass would mean you would need to mount it to some existing deap V boat.. but that defeats the purpose of the duck as I see it.

this thread is kind of making me want to get it going again
In life there is no spacebar!

Rich Erikson AMA 6175
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09-16-2009 04:46 PM  11 years ago
Cope

rrVeteran

South Lake Tahoe CA

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Thanks midwest!

The rudder and prop shaft just run through "Standpipes" that are above water level. Seems easy.

How did you sleeve the neck to get rotation out of the head and what is that servo horn in the neck of the decoy hooked to?

If anyone knows the formula for figuring out the required Amprage ESC to motor combo?

What type of prop shaft? What type of prop?

I figured i would just build a fiberglass deep V on the bottom of the decoy, may hap over balsa?

I'm looking for enough power to go up the creek with out a paddle...

This duck will be entered in our local community "Duck race" unlimited class. The unlimited class is open to mods, but 99.9% of folks just modify the looks of the duck.
Fear is the little death,The mind killer. I will allow my fear to pass through me.Only I will remain
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09-16-2009 05:04 PM  11 years ago
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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what is that servo horn in the neck of the decoy hooked to?
1) So it can quack up if it cracks up while racing?

2) So it can look like it's trash-talkin' the other ducks?
op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t
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09-16-2009 06:12 PM  11 years ago
midwestpilot

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Crystal Lake, IL

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the head is keyed on with a 1/4 turn... I will take it apart tonight and take pics... I just used what ever I had around at the time.. you will see soon.

I saw on the links posted that ducks would follow the decoy... I did not have that luck... they all swam away fast from mine as it approached
In life there is no spacebar!

Rich Erikson AMA 6175
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09-16-2009 06:25 PM  11 years ago
STR8HUCKIN

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lodi ca

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Just get a small electric boat like an sv27. Then you can remove everything you need. Stuffing tube, flex shaft , collet , rudder , outdrive, prop , esc , water cooled motor. If you put the sv 27 stuf in there you would have a 30mph duck.
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09-16-2009 06:27 PM  11 years ago
STR8HUCKIN

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lodi ca

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09-16-2009 09:50 PM  11 years ago
Cope

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South Lake Tahoe CA

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Here's the hull I'm looking at.

http://www.dumasestore.com/catalog/...products_id=418

A possible motor. Is this to big?

http://www.horizonhobby.com/Product...?ProdID=PRB3310

A possible ESC

http://www.horizonhobby.com/Product...?ProdID=PRB3309

Pro boat BlackJack 26 Steerable Drive system.
http://www.xenonproject.com/rc-boat...j26-p-6752.html

I'm not sure i even wanna give this sucker away.
This is kinda making me want to build a boat for my self.....

any one care to share their thoughts on this set up? What i have here is basically all the Proboat Blackjack Brushless running gear. I have heard the Blackjack Brushless is a pretty fast boat? I'll be installing it all in a smaller but probably heaver hull. Oh boy I can't wait to order all this stuff, I might have to get two of everything and just build one with out the duck on top.

Thanks again for all the help.
Fear is the little death,The mind killer. I will allow my fear to pass through me.Only I will remain
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09-17-2009 01:44 AM  11 years ago
midwestpilot

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Crystal Lake, IL

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more pics
Here ya go... I half assed in the servos so you could see how it worked...

I ran the throttle, rudder, turned the head and opened the mouth.. all on two channels. I hooked the mouth to the throttle control that is why there is a slide involved.. the full range of the servo opened the mouth.. and at the very end it would turn it off and on.

The string ran through the eye you can see up into the head where I put a metal rod from ear to ear to have the string loop over and go to the mouth.

I think the rest is self explanatory.. but feel free to ask questions.

In life there is no spacebar!

Rich Erikson AMA 6175
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09-17-2009 04:24 AM  11 years ago
Cope

rrVeteran

South Lake Tahoe CA

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Midwest

Thanks a million for taking the time to disassemble and take those picks.

I hope you don't mind if i use your rotating head and opening mouth?

I got to hand it to ya, that sucker is a marvel of early RC. I love it.
You are one hell of a clever guy.

Thanks again.

Common folks is this too much motor?

Who here runs fast boats and can tell me about propshaft angle, prop pitch and desired prop RPM...

I'm looking to have them rewrite the rules after my duck.
Fear is the little death,The mind killer. I will allow my fear to pass through me.Only I will remain
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09-17-2009 04:30 AM  11 years ago
Brokenlink

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Oakdale

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How fast are you wantin that duck to go?

You are going to be the only one with a motor right,shouldn't have to be awfully fast,just make it dependable with good steering.
Jamie Griffith
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09-17-2009 04:36 AM  11 years ago
Kjarman

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noblesville, IN

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That motor should really push it around..... man, 1500kv at 45amps. That's equivilant to about a .30 nitro engine.... should work out well I would think. Just use as light of a top section as possible....

Better get vid. I wanna see.
I sold another one to Terrafirma...... wife wants to know where the money's at!!!!
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09-17-2009 05:08 AM  11 years ago
Cope

rrVeteran

South Lake Tahoe CA

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Well like I said I don't know squat about RC boats.

As far as fast, I want it so fast they're gonna have to rewrite the rules next season.

I want this guy to win, He's old and could use a vacation.

Yeah 99.9 of the boats are free floating, BUT last year one guy entered a RC duck power by D cell batteries. It did not have much power nor did it win.

This guy is our supplier for ice cream at work ( not really cuz I just quit) He knows I fly helis and approached me about building a RC Duck. I told him you pay I'll build you a seventy MPH duck.

(Granted 70 is pushing it, but I want Fast.)

Double edit, Just so yall no, All I asked for is to have "Designed and built by Lake Tahoe RC" on one side.
Fear is the little death,The mind killer. I will allow my fear to pass through me.Only I will remain
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09-17-2009 02:39 PM  11 years ago
midwestpilot

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Crystal Lake, IL

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I did not copyright any head movement ideas...
so they are all yours...

if your boat gets top heavy and does not want to stay "duck side up" you might need to add a keel.. see pic below of my sail boat..

it is hard to see.. but that is the only pic I have of it.

As stated above.. you might be best to buy a ready to run boat and mount the duck on to it

In life there is no spacebar!

Rich Erikson AMA 6175
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09-17-2009 04:13 PM  11 years ago
Cope

rrVeteran

South Lake Tahoe CA

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While i'm sure it would be best (Easiest) To buy a RTR boat, One of the things I enjoy about this hobby is designing and building things.
If it don't work I play with it until it dose.

I'm also a avid sailor and own a 21' CM swing keel. I was already having thoughts of keels and such. First I'll mount all the heave stuff down as low as i'm able, if that don't work I'll go to a keel then. One issue with a traditional keel is the depth, I'll be running in a small creek so depth is an issue. I might experiment with a"Shoal" keel or even just get some of those lead strips and put those in the bottom of the boat.

Thanks again for the ideas and advice.
Fear is the little death,The mind killer. I will allow my fear to pass through me.Only I will remain
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