Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: 1 2 [3] 4 5 6 7 8 9 10 11   Go Down

Author Topic: Caldercraft Northlight Puffer with working Derrick Crane  (Read 86761 times)

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #50 on: October 10, 2009, 11:40:05 PM »

Peter

Thanks for the pretty picture! Yes that's what I had in mind. The blocks used in the experiment have 0.5mm stainless steel spindles to ensure the sheaves spin freely (and are reserved for use above deck where it shows!). The ones I bought for use below deck have thick brass spindles, so probably wouldn't work as well. Making a small frame is no problem but if I can't find any sheaves on the market with small enough holes, it'll be back to the lathe for another very fiddly session!

Crumbs, look at the time - I'm missing my beauty sleep!

Mike
Logged

HS93 (RIP)

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,949
  • I cannot spell , tough
  • Location: Rainhill UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #51 on: October 10, 2009, 11:59:16 PM »


these are the ones I used on my woking boat derecks, you have to get the right cord to make them work smooth. miskin models do some 0.6mm rope.

Peter


http://www.model-steam-boats.co.uk/boat_fittings/boat_fittings.htm
Logged

tigertiger

  • Global Moderator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 7,296
  • Location: Kunming, city of eternal springtime, SW China.
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #52 on: October 11, 2009, 02:49:12 AM »

Excellent result. Neat and simple.

From the video it sound like you are eating a butty at the time of testing as well. {-)
Logged
The only stupid question is the one I didn't ask

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #53 on: October 11, 2009, 09:10:59 AM »

Peter

Once again, many thanks for your help and information. I only started this thread - very much togue in cheek - in response to Martin's challenge last year but the advice I have received has been invaluable!

Mike
Logged

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #54 on: October 11, 2009, 09:20:00 AM »

Tigertiger

Neat is the last word I would use for it! - but not bad for an ex hospital biochemist!

As for the video: I was working on the dining room table at the time! - SWMBO is very tolerant!

[Just to set the record straight - it was my hand brushing against the masking tape holding the deckhouse in place - if you can believe that!]

Mike
Logged

Ron1

  • Guest
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #55 on: October 11, 2009, 10:37:32 AM »

Now the next job is to get the wheel to lift up and down and get the bom to turn L & R, like anthony,  ;) ;) %)
Logged

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #56 on: October 11, 2009, 01:38:46 PM »

Ron

I have actually had the hoist working. The second spool under the winch is for that. Until I get FLJ's P44 units, the small dead-band of the servo's is a real pain.

Yes I need to get the boom moving! My plan is the same as Anthony's - running a long pivot down below deck. That's going to have to wait until I mount it all in the hull.

Mike
Logged

catengineman

  • Guest
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #57 on: October 11, 2009, 04:03:51 PM »

Could you take the second line below deck and run it to a drum on the end of your lifting winch, but have it driven through a slip clutch idea that way a constant tension could be applied, it would need to be directional and the drum would need a drag brake.

R,
Logged

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #58 on: October 11, 2009, 04:46:57 PM »

Catengineman

Good thinking - but there is a snag! The presence of the winding drums beneath the winch makes the whole unit difficult to jiggle in and out. I think more mechanism would add to this problem - although I'm hoping not to have to remove it too often! I'll give your ideas some thought - need to keep things simple to match my mind!

Mike
Logged

catengineman

  • Guest
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #59 on: October 11, 2009, 06:07:42 PM »

I know what you are saying regarding removal re fitting  :(( I made my Tito Neri anchor winch operational and the first unit gave some problems so I had to rethink that caused some removal / fitting mod's to be carried out but now it works I am happy to leave it where it is, unlike you where you have made a model to test it out I put mine in the model first so now I will use your idea if I ever do things like that again.

Is it possible to put your winch in a more accessible place then reeve the lines to that position via small pulley blocks or the likes of brake cable tubes to guide the line to where you require it.

R,
Logged

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #60 on: October 11, 2009, 06:37:26 PM »

Catengineman

When I started, my thought was to use modified servos (i.e. continuously rotating) to operate the winding drums, so I made a frame to mount them under the winch. Because of their very small deadband, they are not going to be useable, so the plan is leave them in place and just use their motors, driven by FLJ's P44 units. If I were starting again, I would certainly adopt your idea. I'll give it some thought, but having got it just about working, it would take a lot to make me change tack!! However, for the next model ..............!

Mike
Logged

catengineman

  • Guest
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #61 on: October 11, 2009, 06:49:26 PM »

I am having some problems getting the right operation for three dredge gantry winches but two have to do more than just up and down on a line. still it's the fun part of modeling which I find so addictive.
Logged

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #62 on: October 11, 2009, 11:08:47 PM »

Addictive is the word!!

Mike
Logged

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #63 on: October 12, 2009, 04:21:56 PM »

Ron

Just to prove I can do it!



Still a long way short of Anthony's scratch built winch with a fully functional cable drum! (I'm planning to cheat by glueing a length of thread round mine!)



The relay is not very happy at present - it doesn't like the PWM signal feeding the servo motors!

Mike
Logged

Martin [Admin]

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 20,229
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #64 on: October 12, 2009, 04:44:44 PM »


Very impressive Mr. Bond!  :-))
Logged
"This is my firm opinion, but what do I know?!"    -   Mayhem FaceBook Group!

Ron1

  • Guest
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #65 on: October 12, 2009, 06:42:13 PM »

Mike, Its looking good, and your getting there, Anthony,s was built 23 years ago , he was 18 when he started the project. ;) ;)
Logged

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #66 on: October 12, 2009, 07:19:21 PM »

Ron

I've left it a bit late to get up to his standard - threescore years and ten next year!!

Mike
Logged

Ron1

  • Guest
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #67 on: October 12, 2009, 11:17:15 PM »

Im still trying, im 71 in dec this year. ;) ;)
Logged

Corposant

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,616
  • Location: Hampshire UK
Re: Working Puffer Derrick crane anyone?!?!?
« Reply #68 on: October 13, 2009, 09:40:54 AM »

So you're into creaking joints and lost without your watchmaker's loupe too!!

Mike
Logged

Bugsy

  • Guest
I don't suppose I'm the first but .....................
« Reply #69 on: November 20, 2009, 07:31:42 PM »

its still bl**dy annoying.

Fitting some carbon fibre rudder control rods today. Fitted the rudder ends (push-pull system), measured and marked the rods with masking tape, removed them from the boat and 'dremelled' the ends off only to find that I'd cut the wrong side of the masking tape. They are now 3/4" too short.  {:-{  <:(

Logged

omra85

  • Guest
Re: I don't suppose I'm the first but .....................
« Reply #70 on: November 20, 2009, 07:35:14 PM »

Look on the bright side - at least you didn't use 2" masking tape  {-) {-) {-)

Just cut 3/4" out of the boat  :-)) %%

Danny
Logged

barryfoote

  • Guest
Re: I don't suppose I'm the first but .....................
« Reply #71 on: November 20, 2009, 09:04:58 PM »

Bugsy,

I think that kind of thing has happened to us all.....without exception..
Logged

Peter Fitness

  • Global Moderator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,977
  • Location: Wyrallah, near Lismore NSW Australia
Re: I don't suppose I'm the first but .....................
« Reply #72 on: November 20, 2009, 09:40:20 PM »

What's the old saying?? "Measure twice, cut once"  O0 But you only did cut once, but in the wrong place  :o As Footski said, we've all done it.

Peter.
Logged

Damien

  • Guest
Re: I don't suppose I'm the first but .....................
« Reply #73 on: November 20, 2009, 11:02:53 PM »

Bugsy   Mrs Damien says you should get on your knees and thank God your not a Surgeon.
Logged

gondolier88

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,351
  • www.coniston-regatta.co.uk
  • Location: Crake Valley, Cumbria
    • Coniston Regatta
Re: I don't suppose I'm the first but .....................
« Reply #74 on: November 20, 2009, 11:09:02 PM »

Or you could be real boat boatbuilder...
Logged
Don't get heated...get steamed up!
Pages: 1 2 [3] 4 5 6 7 8 9 10 11   Go Up