Model Boat Mayhem - Forum

Please login or register.

Login with username, password and session length.
Pages: 1 [2]   Go Down

Author Topic: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats  (Read 1550 times)

RST

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 614
  • Location: UK
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #25 on: September 04, 2019, 07:08:25 PM »

Only now you said! I used to have a big ice cream tub of stuff like that. Before eBay took-off you could buy random bags of stuff like that for a few quid that would last a decade or more. I had to ditch mine de-cluttering when I almost lost my house when the oil industry crashed. Don't see those suppliers anymore. Old school and China on eBay and whatever else took over since unless you want to make yourself.
Logged

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #26 on: September 04, 2019, 07:21:57 PM »

Cool I'm glad someone does  {-)   thanks Rich


I had some K&S brass tube, think its 1/8th internal. Then I found some styrene tube that fitted inside it (convenient) and tight


So I abraded the styrene and applied slow CA before pushing it in quick! Making the parts only a little over length to begin with! squared off on bench sander after.
Then I tapped 2mm from both ends.
The longer ones pictured are the better product  :-)


TIP I used silicon grease on the tap and backed it out frequent to clear the swarf
Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth

RST

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 614
  • Location: UK
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #28 on: September 04, 2019, 08:24:38 PM »

Andy,

Which bit are you pushing -left, right or bucket up/down?  Will it be the same powered, and how do you convert your "muckle" hand of god bolted to a human been to a servo pushing with a little 1" lever on a 5v micro motor?  You're all pushing such high power motors these days also.  I can push/poke things as much by hand, but there's not much comparison apart from saying it's no friction "dry" -which is always good to start with.

Rich
Logged

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #29 on: September 04, 2019, 08:28:32 PM »

I'm applying very much less pressure than the metal gear servos can deliver. Trust me I've done this before  {-)


Whichever the servo rods don't bend  O0  regardless of my muckle
Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth

RST

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 614
  • Location: UK
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #30 on: September 04, 2019, 08:30:30 PM »

Quote
I had some K&S brass tube, think its 1/8th internal. Then I found some styrene tube that fitted inside it (convenient) and tight


So I abraded the styrene and applied slow CA before pushing it in quick! Making the parts only a little over length to begin with! squared off on bench sander after.
Then I tapped 2mm from both ends.
The longer ones pictured are the better product  :-)
...I've kind of done the same before.  At 2mm / M2 I've used the "hod it and bodge it" approach.  Filed a point on a bolt and used that to cut the thread into the plastic tube (takes allot longer than using a tap, but sometimes I didn't have one). Bit of spit on the threads (surprised how well spit works for allot of things!).  Rough as a badgers ar**, LoL.  Wouldn't consider that for anything at work obviously.
Logged

derekwarner

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 7,964
  • Location: Wollongong Australia
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #31 on: September 05, 2019, 02:28:08 AM »

Andy....following along as always :-)) .....I do have direct experience with hydraulic servo control systems in Naval Missile Launchers and Gun Mounts, however have no real understanding of control systems for water jet drives small marine craft

1. what type of movement controllers do the full sized water jet drives utilise for linear movement?
2. when we see in your models video, from full port to full stdb movement of each jet nozzle is achievable literally in fractions of a second
3. I can understand this speed of movement is relative to the radial displacement of the servo shaft & arm length x buy any mechanical ratio by linkage arms etc
4. do the speeds of movement represent scale movement?
5. are you concerned with twitchyness in the function of the craft?


I am sure all of the aeroplane and helicopter model pilots cope with these question  O0  however I have zero knowledge or experience in either

Derek
Logged
Derek Warner

Honorary Secretary [Retired]
Illawarra Live Steamers Co-op
Australia
www.ils.org.au

tizdaz

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 468
  • Model Boat Mayhem is Great!
  • Location: Chester
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #32 on: September 05, 2019, 07:17:36 AM »


1. what type of movement controllers do the full sized water jet drives utilise for linear movement?
2. when we see in your models video, from full port to full stdb movement of each jet nozzle is achievable literally in fractions of a second
3. I can understand this speed of movement is relative to the radial displacement of the servo shaft & arm length x buy any mechanical ratio by linkage arms etc
4. do the speeds of movement represent scale movement?
5. are you concerned with twitchyness in the function of the craft?

Derek
Im guessing the speed of nozzle movement is determined by how quick you are moving the lever on the TX? also with most newer types of TX's there is an option that lets you adjust the servo speed direct from the TX on-the-fly, so your servo motor will travel full rotation at a set speed no matter how fast you flip the lever :)

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #33 on: September 05, 2019, 07:29:09 AM »

Yes the speed is proportional to how fast or slow you operate the stick  :-))
Thank you both  :-)
Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #34 on: September 05, 2019, 08:12:36 AM »

Burning the midnight oil last night.
Holiday time! first stop Tan Hill the highest pub in England  :}
When I'm back the new trim tabs will be fitted








Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #36 on: September 10, 2019, 05:56:45 PM »

I just want to kill a flat spot in my holiday by making a statement regarding OceanWorks and these drives in particular. I know people are buying them and I want you to know that you may not get exactly what you see pictured in this R&D thread.
The reason for this is that OceanWorks donít sit on their hands and if I or they see room for improvement they make it happen quite quickly  :-))
Canít wait to be back and get mine running
Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth

Charlie

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 599
  • I spend far too much time on Model Boats Mayhem!
  • Location: Kent
    • My Youtube Channel
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #37 on: September 17, 2019, 05:18:05 PM »

Hi Andy,


What motors are you fitting to the OceanWorks Jets?


Charlie

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #38 on: September 17, 2019, 05:29:16 PM »

I have Turnigy SK3 35:42 1250kv in stock so will use these
My other Shannon uses the 1185kv version
Best with 4s LiPo
Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth

dpbarry

  • If it ain't broke, break it and curse fixing it!
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 361
  • Location: Newcastle, Co Down
    • Newcastle Lifeboat Station
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #39 on: September 18, 2019, 10:46:54 AM »

Have you any preference between the two?


Declan


I have Turnigy SK3 35:42 1250kv in stock so will use these
My other Shannon uses the 1185kv version
Best with 4s LiPo
Logged

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #40 on: September 18, 2019, 10:48:08 AM »

1185 is already sufficient
Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth

dpbarry

  • If it ain't broke, break it and curse fixing it!
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 361
  • Location: Newcastle, Co Down
    • Newcastle Lifeboat Station
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #41 on: September 18, 2019, 12:38:13 PM »

Cheers.


That's great. Just looking at them on HobbyKing. Not much of a difference in terms of price - ~£2


Declan


 
1185 is already sufficient
Logged

Charlie

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 599
  • I spend far too much time on Model Boats Mayhem!
  • Location: Kent
    • My Youtube Channel
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #42 on: Yesterday at 05:08:11 PM »


Thanks for the info. I have ordered a pair of 1185kv.


Charlie

1185 is already sufficient

Taranis

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,788
  • Kirklees MBC/ Balne Moor MBC
  • Location: Yorkshire
    • Shannon builders group
Re: OceanWorks Jet drives for 1:12 scale Shannon Lifeboats
« Reply #43 on: Yesterday at 05:17:56 PM »

The videos of mine on the water are with 1185 and easily over scale speed with 4s LiPo
Whether the OceanWorks impellers being only two blade will make any difference I do not know yet but the prop shop brass ones will fit.
I bought them already for the Kehrer jets that I have not used in favour of the IMHO more complete package from OW


Kehrer having no look alike buckets no trim tabs and no intake grills
Logged
ANDY
Happy modelling since Jan 2017
MidWest Lobster boat
My Portgarth
Pages: 1 [2]   Go Up