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Author Topic: new tug boat thing  (Read 7536 times)

edible_engine

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new tug boat thing
« on: January 10, 2007, 11:44:13 PM »

hi i want to make a tug about 4ft in lenth i would like single prop lots of power and a run time of about 90mins oh
and need a bit of speed the thing needs to be made out of wood i need to make it cheap under about 50ish
i have servos transmitter recever i have a 25 and a 15amp esc i have got a graupnear bow thruster (i duno how yah spell it lol)
it must be 2 cha and use sla batterys  ive been told that fan motors work well any idears
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edible_engine

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Re: new tug boat thing
« Reply #1 on: January 11, 2007, 04:45:55 PM »

hi i just found a motor on ebay it looks like it has loads of tork to drive a big prop any one use one of thees  i could use 2 batters  and use 12 and 24 volt fore the speed control


http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=011&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=320068305824&rd=1&rd=1
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Tug

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Re: new tug boat thing
« Reply #2 on: January 11, 2007, 06:27:44 PM »

Be carefull with the fan motor not all are reversable, scrap yard prices about a fiver
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BlazingPenguin

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Re: new tug boat thing
« Reply #3 on: January 11, 2007, 07:38:09 PM »

That particular motors off an electric scooter, runs on 24v and the starting current current is kinda fierceas it can slap an 'Electronize' ESc into submission, requiring a replacement. They can supply a suitable ESC with external relays that are much more suitable with a motor of this type. I use one in my TID and since fitting the new version of ESC have had no problems.

Pushers like Egrete would appear to suit your purposes as they are quick to build being rather slab sided, and will hold a decent battery. For a bow thruster i would forget the graupner type and fit on that Poll and MiniSteve use, home made but costs very little to make and has bags of power.

Single prop in a big nozzle should still be ok, but Egrete is twin screw really, but who would know...unless you have a radio controlled diver in your pond?
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edible_engine

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Re: new tug boat thing
« Reply #4 on: January 11, 2007, 09:06:34 PM »

i,m not going to have a bow thruster now because i would need to get a new radio and i don't like using the rudder on full trim to make it work
i want the price to be very low what sort of prop could the scooter motor spin like how easy is it to make a prop with a hacksaw and a blow lamp and a bit of brass and what sis prop shaft would i need 4 a big prop ?
will a 5mm do ?

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DickyD

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Re: new tug boat thing
« Reply #5 on: January 11, 2007, 09:28:07 PM »

It's a joke right  ;D ???
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J.beazley

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Re: new tug boat thing
« Reply #6 on: January 11, 2007, 09:35:17 PM »

wouldnt recommend making your own prop unless you have the tools to balance and set the pitch, you need to balance it and get the pich right.
in other words BIG job, would be cheaper to buy a ready made prop.

Jay

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If it floats I'll  build it, if it sinks its a sub either way its in the water so I'm content.

edible_engine

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Re: new tug boat thing
« Reply #7 on: January 11, 2007, 09:50:51 PM »

i have a balancer and a pillar drill Ive made them be fore by cutting a disc out of mettle cutting 4 slits in it bolting it on the shaft and twist each blade to the pitch i need i have this on a small boat it works very well but i think i  need sumthing more substantial

oh and ime 14 so i have more time than money i will have a go at any thing
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DickyD

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Re: new tug boat thing
« Reply #8 on: January 11, 2007, 09:59:22 PM »

It is a joke ::) ;D
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flybobby

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Re: new tug boat thing
« Reply #9 on: January 11, 2007, 10:25:54 PM »

This is great stuff ;D ;D
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grasshopper

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Re: new tug boat thing
« Reply #10 on: January 11, 2007, 10:40:04 PM »

He's probably a 43 year old policeman posing as a 14 year old   in the hope that he'll catch some of us weird boatties....

Mind you, the exuberance of youth knows no bounds, and who is to say he couldn't make a prop'. It is obvious he spent more time in the workshops than in the english class.
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edible_engine

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Re: new tug boat thing
« Reply #11 on: January 11, 2007, 10:45:48 PM »

why don't you believe ime 14 i am Lol sorry about the spelling do you want a pic of me or sumthing Lol making a prop ime going to try to get one made in school they have sum PC controlled cutting thing that engraves stuff and cuts it. what sort of size prop do i need fore a 4ft tug ? ime going to make a prop and try sum of the motors i got to see if they get hot and how much water they move


and Ive added a pic of me in my back garden casting aluminum
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Stavros

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Re: new tug boat thing
« Reply #12 on: January 11, 2007, 11:27:12 PM »

EE can you please cut out the LOL it's getting a bit irritating oh and bye the way if you look at the bottom of the screen there is a spellchecker available so what excuse have you now!!!!!!!
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edible_engine

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Re: new tug boat thing
« Reply #13 on: January 11, 2007, 11:41:35 PM »

i dunno what your problem is is it because you are all in your 50s ?
to be honest this forum is the worst Ive been in you all go OTT about my spelling
so what if i cant spell  ime just trying to speak to pepole with the same intrest what is your problem ?
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John W E

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Re: new tug boat thing
« Reply #14 on: January 12, 2007, 12:00:17 AM »

Edible engine - remember this - one of the richest men in this world cannot spell, cannot write and yet he owns trains, planes, boats and he has done a lot more than the majority of us on this forum and being able to spell did that improve his chances of getting on in the world - I think not.

one of the greatest musicians in this world couldnt read or write a note of music - and look where he is in this world.

So take no notice of these half wits that pull you apart about not being able to spell because you are the type of person this hobby needs.  You are young, enthusiastic and willing to give it a go.

For those who pull you apart about your spelling on this Forum you are actually doing something that they wish they could do - and that is producing a model for yourself from nothing.  So what I say to those who criticise is take the plank out of their own eye, before they try to take the spelk out of yours.

KEEP ON BUILDING MY FRIEND and take no notice of these dictionary halfwits.

Aye
BLUEBIRD
John E
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edible_engine

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Re: new tug boat thing
« Reply #15 on: January 12, 2007, 12:21:21 AM »

thanks BLUEBIRD

is polyester resin OK to seal the hull and not expoy epoxy has more flex i think and it is a 50/50mix
and what is the largest brass prop you can purchase Ive seen 70mm ones is this as big as it gets ?
just looks in the shead the strip of brass Ive got it so small to make a prop

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portside II

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Re: new tug boat thing
« Reply #16 on: January 12, 2007, 12:49:20 AM »

hi edible_engine
you should be able to get props above 100mm as i have a 90mm fitted to my tug (brakengarth) and that was off the shelf ,i think it's a raboche(please pick me up on the correct spelling as the spell checker can't work it out).if your building a pusher then twin's would be better and the radiator fans from Austin metro's work well in both directions and have a realistic torque and speed of about 850rpm on 12v i fitted twin's in my first scratch build through 50mm three bladed props in plant pot corts worked fine plenty of pull
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I like to build my boats to play with, not to just look pretty,so they dont !

edible_engine

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Re: new tug boat thing
« Reply #17 on: January 12, 2007, 12:53:53 AM »

thanks

the boat in the pic is like what i wanted but i cudend get plans do you no wher i culd get plans of this and how long is it ?
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portside II

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Re: new tug boat thing
« Reply #18 on: January 12, 2007, 08:35:32 AM »

she is called SILEX and her sister ship THORAX  i built her from very basic plans in a copy of Lecco international (a tug enthusiasts magazine)which i found whilst trawling through the net ,saw her and liked her.she was built to my own unorthodox scale ,about 3' long but has since moved to another quay.
All made from mdf ribs,keel and deck, balsa sheet sides covered with colour (acrylic) mixed fiberglass and tissue and a 40a gel battery for power and ballast  and boy did she need it as well as the 10lb's of lead in the aft to put the props in the water.
I may have the original mag somewhere in the shed if you want some pages scanning .
daz
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HS93 (RIP)

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Re: new tug boat thing
« Reply #19 on: January 12, 2007, 10:18:28 AM »

At least his posts are about Model Boats..

Peter
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John W E

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Re: new tug boat thing
« Reply #20 on: January 12, 2007, 10:19:31 AM »

is polyester resin OK to seal the hull - yes polyester resin is fine for the amount of time that our models are actually in the water.  If you look through this forum there are quite comprehensive threads on the use of poly resins and  expoy resins

 epoxy has more flex i think and it is a 50/50mix - yes this is right to a degree but, when you mention 50/50 epoxies you are dealing with epoxies with additives in that we tend to use for bonding and the other 50/50 epoxies which I can think of with a 50/50 mix is the specialised stuff which the Electricity Board use and also pipe manufacturers use and it isnt really suited for our purpose in modelling - its too thick and difficult to use.

and what is the largest brass prop you can purchase Ive seen 70mm ones is this as big as it gets ? The largest - I believe someone has already answered this.   Have a quick look on ebay I noticed there were some 100mm brass props for sale on there - however, when I get me brain switched on (after charging it) somewhere I have drawings for making a jig up to make your own prop blades.

'just looks in the shead the strip of brass Ive got it so small to make a prop' themethod you use to make a prop is I presume is to make a prop out of a circle the method I was going to show is making individual blades and centre boss for this you will need the facility of either a pillar drill or lathe & to be able to silver solder.

Hope is this of some help.

Aye
JOHN E
bluebird

(away to get me brain charged)
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John W E

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Re: new tug boat thing
« Reply #21 on: January 12, 2007, 10:22:11 AM »

DickyD - with great respect Sir, if you are so concerned about spelling/spell checkers/peoples' images you my friend need to disembark from this forum and perhaps relocate yourself on a Forum entitled 'The do's and dont's of the English Language' .   Least said the better  ::)

Aye
JOHN E
BLUEBIRD
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DickyD

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Re: new tug boat thing
« Reply #22 on: January 12, 2007, 10:30:18 AM »

At least his posts are about Model Boats..

Peter
Changed your tone since you posted on "Re: 12volt batterys slead lead "  ;)
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DickyD

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Re: new tug boat thing
« Reply #23 on: January 12, 2007, 10:46:16 AM »

DickyD - with great respect Sir, if you are so concerned about spelling/spell checkers/peoples' images you my friend need to disembark from this forum and perhaps relocate yourself on a Forum entitled 'The do's and dont's of the English Language' .   Least said the better  ::)

Aye
JOHN E
BLUEBIRD


The Forum should be entitled 'The dos and don'ts of the English Language'
Least said the better . ;)
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John W E

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Re: new tug boat thing
« Reply #24 on: January 12, 2007, 10:55:51 AM »

hey Dicky or should I say (DictionaryD) hooo yee man am off to bild a mogel of the ceee4th conrer like hinney

at least a daint av to luk at dickynary d bild a mogel.

have a nice day marra  ;D ;D ;D :D ::)

aye
john e
bluebird

 ;D ;D ;D
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