TheRcModelBoatForum.com
Please login using your username and password to use the forum.

If you do not have an account please register to participate, it’s free!

TheRcModelBoatForum.com

A Forum For Modelers By Modelers.
 
HomeHome  PortalPortal  RegisterRegister  Log inLog in  
Share
 

 Our Springers

Go down 
AuthorMessage
Mark
Able Seaman
Able Seaman
Mark

Posts : 42
Join date : 2011-06-11
Location : Portsmouth uk

Our Springers Empty
PostSubject: Our Springers   Our Springers EmptySat Jun 11, 2011 2:36 pm

First my wifes boat and then my big springer

[img]Our Springers PICT0141[/img]

[img]Our Springers 2010_02140001[/img]
Back to top Go down
AlanP
Master
Master
AlanP

Posts : 281
Join date : 2011-06-11
Age : 75
Location : South Cumbria

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyThu Jun 23, 2011 10:10 pm

Here are my two Springers, Lady Laura and Woody

Our Springers Lady_l10


Our Springers Woody110
Back to top Go down
nhp651
Captain (moderator)
Captain (moderator)
nhp651

Posts : 3951
Join date : 2011-06-11
Age : 68
Location : Fleetwood Lancashire

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyThu Jun 23, 2011 10:22 pm

i just love the hundreds of variations that you see of the springer......

if it weren't for these variations i don't suppose it would have the same appeal that it does, but boy oh boy, there are some that REALLY make me smile and brighten my day....little things like the toy story woodie on yours alan....just brilliant imagination.....sadly something i don't possess....if it ain't on the plans, i'm stuffed, and i really do admire that imaginative trait in you springer builders..
Back to top Go down
Mark
Able Seaman
Able Seaman
Mark

Posts : 42
Join date : 2011-06-11
Location : Portsmouth uk

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyFri Jun 24, 2011 8:44 pm

Thats the good thing about about springers Neil,the tops of them are endless.
Your building qualities are superb,so maybe we will see a RNLI springer
Mark
Back to top Go down
nhp651
Captain (moderator)
Captain (moderator)
nhp651

Posts : 3951
Join date : 2011-06-11
Age : 68
Location : Fleetwood Lancashire

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyFri Jun 24, 2011 9:11 pm

well, it's definately a thought...was wondering if i ever got round to one, what i could do one as.

what i didn't realise was that they are modelled on the base of real vessels that have the hull shape....i always thought that they were originally a figment of someones imagination.
how wrong can i be.
cheers.

neil
Back to top Go down
Mark
Able Seaman
Able Seaman
Mark

Posts : 42
Join date : 2011-06-11
Location : Portsmouth uk

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyFri Jun 24, 2011 9:33 pm

Easy,
Build a basic hull,then put one of great ribs that you made on top,bucket by pondside,
hopefully public will give to a worthy cause
Back to top Go down
Footski
Forum Sponsor
Forum Sponsor
Footski

Posts : 549
Join date : 2011-06-11
Age : 61
Location : Malaga, Spain

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyFri Jun 24, 2011 10:09 pm

Here is my one and only effort at a Springer, modeled on the tanker my son works on..

Our Springers Tessa_10
Back to top Go down
mattycoops43
Midshipman
Midshipman


Posts : 51
Join date : 2011-06-12
Location : Newport, South Wales

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptySat Jun 25, 2011 9:21 am

HA HA HAAA! Still waiting to see that springer on the plane!!! bounce
Back to top Go down
vnkiwi
Deck Hand
Deck Hand
vnkiwi

Posts : 6
Join date : 2011-06-11
Age : 70
Location : Hamilton NZ

Our Springers Empty
PostSubject: my footy springer   Our Springers EmptyFri Mar 16, 2012 7:19 am

Don't have enough space for a full springer, so made this one at 66% size.
Runs a 240 motor, SAB plastic prop and brass tube, on 7.2v rechargable NiMH, 2.4Ghz control.
https://i.servimg.com/u/f46/17/36/24/73/scruff12.jpg
https://i.servimg.com/u/f46/17/36/24/73/scruff13.jpg
https://i.servimg.com/u/f46/17/36/24/73/scruff14.jpg

video here

https://www.youtube.com/watch?v=d3PZENXBFpQ

All balsa, and will be my rescue boat for my other boats I'm building

vnkiwi
Back to top Go down
Tug--Kenny
Lost But Never Forgotten R.I.P
Tug--Kenny

Posts : 284
Join date : 2011-06-11
Age : 77
Location : Newport, South Wales,UK

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyFri Mar 16, 2012 11:15 am

Very nice. Very Happy Do you plan to have pushers on the bow ?


ken
Back to top Go down
nhp651
Captain (moderator)
Captain (moderator)
nhp651

Posts : 3951
Join date : 2011-06-11
Age : 68
Location : Fleetwood Lancashire

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyFri Mar 16, 2012 12:02 pm

a bonny little model.............you could almost put it in your pocket.....

neil.
Back to top Go down
AlanP
Master
Master
AlanP

Posts : 281
Join date : 2011-06-11
Age : 75
Location : South Cumbria

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyFri Mar 16, 2012 4:25 pm

Cute cheers



Alan
Back to top Go down
vnkiwi
Deck Hand
Deck Hand
vnkiwi

Posts : 6
Join date : 2011-06-11
Age : 70
Location : Hamilton NZ

Our Springers Empty
PostSubject: Re: Our Springers   Our Springers EmptyFri Mar 16, 2012 5:33 pm

Not at this stage Ken. Most of my boats are less than 24inches long and its fitted with a floating ball and line, (not attached in the video) so its mostly circle and tow back. But it does have a continuous soft rubber bumper all round.
May fit one later if I think its required
Here is a video link of the size boats I have at the moment

https://www.youtube.com/watch?v=QOHhgG6Ay3A

This is my 12" Fairey Swordsman, Both boats have the same power train and r/c, except that the swordsman runs 4.8v NiMH rechargeables (weight is critical)
cheers
kiwi
Back to top Go down
tarak
Deck Hand
Deck Hand


Posts : 5
Join date : 2019-10-18
Location : Devonport Tasmania

Our Springers Empty
PostSubject: just a help for my brothers   Our Springers EmptyFri Oct 18, 2019 9:48 am

I tried to post this before so i will try again. I was asked to help with the springer tug that my brothers and mate are and have built.
so one brother Roy wanted to use a shottle drive so need some help
so
Graupner Schottel Drive Unit I (1761) then motors choice


MFA Torpedo 800 with Belt Drive Unit

MFA950D 385 Geared Motors
Krick Max Gear 540 Type Motor 2.5:1

so I worked out a way to do some more calculations and could be used on any model I think I have been mainly working stuff out for real boats so made an adaption
Model boat speed/ pitch/rpm calculations
 
First change all to meters   and seconds
 
RPM = RPS    Speed MPH to   m/s  pitch inches or cm or mm to metres
 
V= speed wanted or known
 
RPS
 
P pitch into meter
 
V=  P/RPS        P = V/RPS     RPS = V/P 
 
Example   tug
Prop RPM   = 560    
 
P x 2.89” = per rev = 2.89X 60 = 173.4”  = 4.38m 
 
V = 9.33 /4.38  = 2.13m/s    = 7.66kph or 4.76mph
Losses approx. 26%  would then give 4.76 – 1.23 = 3.53mph
 
The thrust ?
 
 
Dwlbs  Springer tug 1.5kg = 3.31lb
 
So I make it
 
3.31lb will displace .0015m3  in fresh water or .05297cub ft
 
To move it at 3.576 m/s or 8mph
 
You will need  52.6 N  or 11.82lb-force
 
At 1.788m/s or 4 mph
 
You will need 26.3N or 5.9lbs- force
 
This will help   https://www.omnicalculator.com/physics/buoyancy#buoyant-force-equation
 
Loss about 5%  about 7.6 mph   or 3.8mphjust thought it may be interesting to you
Back to top Go down
 
Our Springers
Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
TheRcModelBoatForum.com :: Modelling Categories :: Tug Boats-
Jump to: