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Author Topic: Springer tugs  (Read 3063 times)

john_k

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Springer tugs
« on: May 03, 2014, 03:39:49 PM »

Hi,
 I'm almost becoming embarrassed when every time I post it's a cry for help. Busy finishing my sailboat? trimaran, but I seem to have found Springers. I have started making my hull, want to start ordering the prime mover etc. but it seems that for every boat builder there is another spec. I have just gone through 100's of posts suggesting various motor / gearbox / propeller  combinations. I think I know which way to go but I need to know one more thing. How fast can a springer go before becoming a submarine? Thanks folks, John K.
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boatmadman

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Re: Springer tugs
« Reply #1 on: May 03, 2014, 05:00:02 PM »

As fast as you like, just seal up the deck join well! Thats the fun with springers, they can do lots of unusual stuff! %%


Seriously though, just chuck a bit of weight in the stern to lift the bow and it should be ok.


Have fun!
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Umi_Ryuzuki

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Re: Springer tugs
« Reply #2 on: May 03, 2014, 07:42:23 PM »

Quote
How fast can a springer go before becoming a submarine? Thanks folks, John K.

Right up to the point where they "ARE" submarines.
By Ralph Kings
http://www.rcgroups.com/forums/attachment.php?attachmentid=1714991

Or if the balance is changed, as fast as you want...
http://www.rcgroups.com/forums/attachment.php?attachmentid=843703

 :-))

html

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Re: Springer tugs
« Reply #3 on: May 03, 2014, 08:14:44 PM »

All of the above, their hull shape makes them dive, so either a light throttle finger or has been said move the batteries backwards. It does not stop the diving just makes it less. With a good size coaming around the deck access hole, it is quite scary how much water you can get over the deck and nothing inside. My first springer on full throttle could easily have an inch of water going across the deck, I moved the batteries to make it less. It also had a lot of grunt, 550 motor with a 38mm 3 bladed prop it could push most other boats around with ease
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bat44

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Re: Springer tugs
« Reply #4 on: May 03, 2014, 09:56:19 PM »

12 volt 600 motor 40mm 4 blade prop
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Martin (Admin)

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Re: Springer tugs
« Reply #5 on: May 03, 2014, 11:43:07 PM »



.... where is she now?!
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Umi_Ryuzuki

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Re: Springer tugs
« Reply #6 on: May 04, 2014, 12:11:41 AM »

I believe Red Oktober is working a street corner in Sweden, busking for postage and handling.

 {:-{

The builder "Toesup" has had a couple of recent surgeries, but is doing well.  :-))

john_k

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Re: Springer tugs
« Reply #7 on: May 04, 2014, 07:16:35 AM »

Hi,
Sorry if my query was misconstrued, I'll try to clarify. I am sure I have read somewhere that, for displacement hulls, there is a limiting hull speed, dependent on hull shape and waterline length, that cannot be exceeded, irrespective of how much power is applied to drive the boat. I wondered if a figure is available applicable to the springer hull? I would use this information to try to derive an optimum motor / gearbox / propeller combination for the boat I have just started building.
Thanks John K.

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Arrow5

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Re: Springer tugs
« Reply #8 on: May 04, 2014, 09:45:24 AM »

I believe Red Oktober is working a street corner in Sweden, busking for postage and handling.

 {:-{   Finland actually.   Rich widow woman dumped the crew and they are about to move south. Last seen loitering with intent in Holland.

The builder "Toesup" has had a couple of recent surgeries, but is doing well.  :-))
  Best wishes from crew to the Master. Get well  NOW...that is an order.
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Arrow5

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Re: Springer tugs
« Reply #9 on: May 04, 2014, 09:47:12 AM »

  Best wishes from crew to the Master. Get well  NOW...that is an order.
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Martin (Admin)

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Re: Springer tugs
« Reply #10 on: May 04, 2014, 02:16:08 PM »


 I have read somewhere that, for displacement hulls, there is a limiting hull speed, dependent on hull shape and waterline length, that cannot be exceeded, irrespective of how much power is applied to drive the boat.


Yes, that's quite true....There is the most efficient application of power, an optimal application of power and then there's the 'Top Gear' rule! i.e. just fit a bigger engine and press the loud pedal!!

Look on Youtube, you'll find a couple of Brushless Springers up on the plane!

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Netleyned

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Re: Springer tugs
« Reply #11 on: May 04, 2014, 05:26:56 PM »

Top gear rule >>:-(
Make sure the slope on the bow is ok %%

Ned
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html

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Re: Springer tugs
« Reply #12 on: May 04, 2014, 07:56:07 PM »

I think personally as they were designed to put the fun back in boating, have fun forget the science build one and see what happens  :-)) :-)) :-)) :-)) :-)) :-)) :-)) :-)) :-)) :-)) :-))
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boatmadman

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Re: Springer tugs
« Reply #13 on: May 04, 2014, 09:09:30 PM »

I built one with twin 40mm korts - loads of power, and often gets involved in a bit of 'springer sumo' with a friends springer, when two  try and sink each other!!


Neither have succeeded and neither take any water in, but its good fun and brings a lot of laughs and comments from kids of all ages.
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john_k

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Re: Springer tugs
« Reply #14 on: May 05, 2014, 02:34:37 PM »

More than a little disappointed. I had expected that at least some of the responses would be constructive. Live and learn . . .
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Martin (Admin)

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Re: Springer tugs
« Reply #15 on: May 05, 2014, 03:15:23 PM »


About 8mph depends to fore aft weight balance.


Standard 540 Motor, Graupner speed 600, etc.
40mm plastic prop.
6v or 7.2v battery.
Speed controller of your choice.

... there is no 'right' way of doing it.   :-)

See: http://www.modelboatmayhem.co.uk/forum/index.php/topic,3471.msg34786.html#msg34786

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john_k

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Re: Springer tugs
« Reply #16 on: May 05, 2014, 11:33:14 PM »

Many thanks
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