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Author Topic: Yet another new build Springer!  (Read 18624 times)

radiojoe

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Re: Yet another new build Springer!
« Reply #75 on: August 18, 2014, 07:35:33 PM »

As Bill said sounds like the prop, try a four blade courser pitch, something else to consider is cavitation your prop is quite near the surface so it may be sucking air under the transom when going astern, and when you go forward the bow goes up and the stern goes down making the prop lower in the water, you could try a bit more ballast and raise the water line slightly, just a thought

Joe.
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Netleyned

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Re: Yet another new build Springer!
« Reply #76 on: August 18, 2014, 07:43:01 PM »

Most Springers bury the bow when
going ahead.
If you have one that burys the stern
please tell us all the secret.

Ned
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radiojoe

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Re: Yet another new build Springer!
« Reply #77 on: August 18, 2014, 07:49:47 PM »

I have no knowledge of springers, it was just a suggestion what could be happening with the prop based on most of the boat sailing characteristics I have had, as I said "it was just a thought"
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Netleyned

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Re: Yet another new build Springer!
« Reply #78 on: August 18, 2014, 07:56:09 PM »

Springers are well known for submarine tendencies.
Many have tried to keep the bows up without success.
Thats why your post seemed a bit strange Joe.

Ned
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Arrow5

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Re: Yet another new build Springer!
« Reply #79 on: August 18, 2014, 08:03:13 PM »

Agree the prop is not the best. Try same size in brass, expensive but....
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KillerDave

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Re: Yet another new build Springer!
« Reply #80 on: August 18, 2014, 08:11:48 PM »

Here's a rough video of the run, it was shot from my wifes iPhone....


Let me know what you think...


https://www.youtube.com/watch?v=w1iKlHpFWD0&feature=youtu.be


I think it looks ok??? just wont go backwards...


I will look up some decent props... thanks guys...
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MLT44

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Re: Yet another new build Springer!
« Reply #81 on: August 18, 2014, 08:51:31 PM »

Hi
   l built the very pink one. The prop l use is 45 three blade from SHG, lt's one of there brass ones, no probs. Running gear 540/1 motor, on 7/4 lipo, goes like bat out hell f/r,
    Hope this helps.
                          Regards  Dave   
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Tug-Kenny

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Re: Yet another new build Springer!
« Reply #82 on: August 18, 2014, 08:54:59 PM »


What motor are you using.   I've looked at your film and noticed it seemed down on power.  There seemed to be little disturbance behind the boat when moving.

ken
 
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KillerDave

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Re: Yet another new build Springer!
« Reply #83 on: August 18, 2014, 09:27:17 PM »

What motor are you using.   I've looked at your film and noticed it seemed down on power.  There seemed to be little disturbance behind the boat when moving.

ken


Not actually sure??? it's a standard silver can 540 I think???


It was in my late fathers parts box already bolted to the gearbox....


Do you think I should bin the gearbox?


I am a little lost on brushed motors....  {:-{
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Arrow5

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Re: Yet another new build Springer!
« Reply #84 on: August 18, 2014, 10:23:18 PM »

Try a direct drive.  The video shows very poor Springer performance.   540 motor is good.
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KillerDave

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Re: Yet another new build Springer!
« Reply #85 on: August 18, 2014, 10:33:13 PM »

Try a direct drive.  The video shows very poor Springer performance.   540 motor is good.


I'll give that a go...

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Arrow5

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Re: Yet another new build Springer!
« Reply #86 on: August 18, 2014, 10:38:01 PM »

Standard 540 can motor, 6 volts, 3 blade brass 40mm prop.  No too bad in reverse , about 40% speed.
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radiojoe

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Re: Yet another new build Springer!
« Reply #87 on: August 18, 2014, 11:03:48 PM »


Not actually sure??? it's a standard silver can 540 I think???


It was in my late fathers parts box already bolted to the gearbox....


Do you think I should bin the gearbox?


I am a little lost on brushed motors....  {:-





Had not realised you used a gearbox, that could well be your problem.
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KillerDave

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Re: Yet another new build Springer!
« Reply #88 on: August 19, 2014, 06:08:56 AM »


Had not realised you used a gearbox, that could well be your problem.


I used the gearbox as that was on the drawing I used.


I'll fit the motor direct later and see how that goes....


Many thanks guys!


Here's a little under water action....


https://www.youtube.com/watch?v=CQ7lYK80AJ4&feature=youtu.be

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radiojoe

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Re: Yet another new build Springer!
« Reply #89 on: August 19, 2014, 09:08:32 AM »

hi Dave
good video, it would seem the prop is not revving that much, when I put Zulu in the bath at full throttle the bath turns in to a bubbling caldron, she has a 480 motor and 35mm prop direct drive, it depends on what speed you want really, I never run at full throttle I prefer to run at scale speed, but it's good to know I can move out of the way of another boat if necessary .   :-))

Joe.
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morley bill 1

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Re: Yet another new build Springer!
« Reply #90 on: August 19, 2014, 09:17:46 AM »

Hi Dave try ringing Simon at prop shop tell him what your running motor set up is he should be able to help with this info  Regards Bill....
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KillerDave

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Re: Yet another new build Springer!
« Reply #91 on: August 19, 2014, 01:06:54 PM »

Thanks guys.
 
I am going to remove the gearbox first and see how that pans out....
 
Then I'll go for a metal prop and so on....
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KillerDave

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Re: Yet another new build Springer!
« Reply #92 on: August 19, 2014, 01:07:37 PM »

Standard 540 can motor, 6 volts, 3 blade brass 40mm prop.  No too bad in reverse , about 40% speed.

BTW, Great photo!!!  :-))
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Tug-Kenny

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Re: Yet another new build Springer!
« Reply #93 on: August 20, 2014, 11:04:22 AM »


Yes indeed  A great bit of underwater filming.    :-))


(the surf should have damaged the camera)   {-)

You're on the way up now.......


Ken
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KillerDave

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Re: Yet another new build Springer!
« Reply #94 on: August 20, 2014, 01:02:44 PM »

Yes indeed  A great bit of underwater filming.    :-))
(the surf should have damaged the camera)   {-)
You're on the way up now.......
Ken

On the way up???
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KillerDave

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Re: Yet another new build Springer!
« Reply #95 on: August 20, 2014, 07:50:17 PM »

Ok,


I pulled out the gearbox and made a small bush for the coupling and it's all back together again.


Here's a little video of it in the test tank (the bath)  :}


https://www.youtube.com/watch?v=iO-idQAJuL4&feature=youtu.be


I'll take it to the lake tomorrow and post another video....
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Tug-Kenny

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Re: Yet another new build Springer!
« Reply #96 on: August 20, 2014, 08:43:31 PM »


 
                           :-))     :-))   


ken

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KillerDave

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Re: Yet another new build Springer!
« Reply #97 on: August 20, 2014, 09:40:15 PM »

Hey guys,


I threw a mast together... Let me know what you think???







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radiojoe

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Re: Yet another new build Springer!
« Reply #98 on: August 21, 2014, 09:34:37 AM »

going by the video there seems to be a lot more thrust both directions and no sign of cavitation :-))

Joe.
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KillerDave

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Re: Yet another new build Springer!
« Reply #99 on: August 21, 2014, 12:56:05 PM »

going by the video there seems to be a lot more thrust both directions and no sign of cavitation :-))

Joe.

Yes Joe, it does look alot more powerfull...
 
I am taking it to the lake tonight after work just for a short while.....
 
I'll post another video this evening....
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