Model Boat Mayhem - Forum

Please login or register.

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

Author Topic: Aerokit Sea Commander saved from the tip!  (Read 7723 times)

AndrewB

  • Shipmate
  • *
  • Offline Offline
  • Posts: 20
Aerokit Sea Commander saved from the tip!
« on: May 09, 2016, 05:25:51 AM »

Poor old girl, still nothing a bit of loving and brushless running gear wont fix  :-)
Logged

Goldcupper

  • Inactive
  • Shipmate
  • *
  • Offline Offline
  • Posts: 23
  • Model Boat Mayhem is Great!
  • Location: Norfolk
Re: Aerokit Sea Commander saved from the tip!
« Reply #1 on: May 09, 2016, 09:24:40 AM »

I can't believe some clod would put that in a skip!  Somebody's one time pride and joy.
Good for you for saving her.  Wish I could find skips like that round here!


Martin
Logged

AndrewB

  • Shipmate
  • *
  • Offline Offline
  • Posts: 20
Re: Aerokit Sea Commander saved from the tip!
« Reply #2 on: May 11, 2016, 11:24:58 PM »

Well I have stripped off the 4 layers of paint and it is looking pretty good.
Logged

Goldcupper

  • Inactive
  • Shipmate
  • *
  • Offline Offline
  • Posts: 23
  • Model Boat Mayhem is Great!
  • Location: Norfolk
Re: Aerokit Sea Commander saved from the tip!
« Reply #3 on: May 11, 2016, 11:27:50 PM »

Andrew, you may want to carry on that strake to the bow and both sides, too. It'll make quite a difference to the performance.
Excellent progress so far.
Cheers,
Martin
Logged

AndrewB

  • Shipmate
  • *
  • Offline Offline
  • Posts: 20
Re: Aerokit Sea Commander saved from the tip!
« Reply #4 on: May 11, 2016, 11:35:05 PM »

Hi Martin
I was wondering if I should do that,  thanks.  I will
Andrew, you may want to carry on that strake to the bow and both sides, too. It'll make quite a difference to the performance.
Excellent progress so far.
Cheers,
Martin
Logged

canabus

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 761
  • Boats a hole in the water you pour money into!!!
  • Location: Tasmania,Australia
Re: Aerokit Sea Commander saved from the tip!
« Reply #5 on: May 12, 2016, 07:56:42 AM »

What's the plan for the running gear?
A 35mm 1100kv brushless and a 5800mah Lipo in 3S or 4S?
Logged

AndrewB

  • Shipmate
  • *
  • Offline Offline
  • Posts: 20
Re: Aerokit Sea Commander saved from the tip!
« Reply #6 on: May 12, 2016, 08:13:42 AM »

Not really thought about it yet,  this will be my first delve into brushless.
What's the plan for the running gear?
A 35mm 1100kv brushless and a 5800mah Lipo in 3S or 4S?
Logged

canabus

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 761
  • Boats a hole in the water you pour money into!!!
  • Location: Tasmania,Australia
Re: Aerokit Sea Commander saved from the tip!
« Reply #7 on: May 12, 2016, 09:21:11 AM »

Hi Andrew
Check out u tube Spearfish on.
This will give you an idea of what the brushless motors give you in speed.
The Spearfish is about the same size boat.
Logged

AndrewB

  • Shipmate
  • *
  • Offline Offline
  • Posts: 20
Re: Aerokit Sea Commander saved from the tip!
« Reply #8 on: May 12, 2016, 08:32:49 PM »

Inrunner or outrunner?

Hi Andrew
Check out u tube Spearfish on.
This will give you an idea of what the brushless motors give you in speed.
The Spearfish is about the same size boat.
Logged

canabus

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 761
  • Boats a hole in the water you pour money into!!!
  • Location: Tasmania,Australia
Re: Aerokit Sea Commander saved from the tip!
« Reply #9 on: May 13, 2016, 10:49:00 AM »

Hi Andrew
Hobbyking in runners 3639-750,3648-850,3639-1100 or 3648-1450.
ESC car 60 amp(HK-60SL)or 100amp(HK-100A).
Program card (HK Prog-Card) dam easy to use.
Speed and Amp test on Spearfish at the weekend.
This ended some people's ideas on props.
Motor 3648-1450kv and ESC 60A only the cutoff voltage changed in the setup.

ON 3S 5800mah Lipo
Prop 2blade 38mm x 1.4 pitch 35Amps speed 27kph.
                  40mm x 1.4 pitch 37Amps speed 26kph.
Prop 3blade 37mm x 1.4 pitch 42Amps speed 26kph.

ON 4S 5800mah Lipo
Prop 2blade 38mm x 1.4 pitch 60Amps speed 36kph.
                  40mm x 1.4 pitch 55Amps speed 37kph.
Prop 3blade 37mm x 1.4 pitch 60Amps speed 37kph.

Pretty quick for an old girl!!!!

The quick test from the 1900kv,4S was with the  3blade 37mm but no data.
It was dam fast, I think it would out run an IC motor.


Logged

Goldcupper

  • Inactive
  • Shipmate
  • *
  • Offline Offline
  • Posts: 23
  • Model Boat Mayhem is Great!
  • Location: Norfolk
Re: Aerokit Sea Commander saved from the tip!
« Reply #10 on: May 13, 2016, 11:04:39 AM »

Not that I'm remotely interested in brushlesses and LiPos, but can somebody explain the pitch measurement to me, please. For instance, my old narrow boat had a 26x 16 prop.  26" diameter x 16" pitch. One turn moved the water 16".  So what can 1.4 be?  Not millimetres, surely?
Cheers,
Martin
Logged

canabus

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 761
  • Boats a hole in the water you pour money into!!!
  • Location: Tasmania,Australia
Re: Aerokit Sea Commander saved from the tip!
« Reply #11 on: May 13, 2016, 12:33:09 PM »

That's a 64 dollar question.
I maybe wrong, but, I think the pitch is the distance one turn of the prop moves the boat thru the water.
This may open another can of worms!!!!
I watched the Great Canal Journeys Series, lovely boats and canals.
Logged

Goldcupper

  • Inactive
  • Shipmate
  • *
  • Offline Offline
  • Posts: 23
  • Model Boat Mayhem is Great!
  • Location: Norfolk
Re: Aerokit Sea Commander saved from the tip!
« Reply #12 on: May 13, 2016, 12:53:24 PM »

But that would suggest the prop had almost no pitch at all, i.e. 1.4 mm.  I think that most unlikely. It would look flat!  Some real props are "square.  The Singer Commodore, for instance, was a 9 x 9.  (I just happen to know that!!, weirdo that I am<G>)

Yes, Mr. and Mrs. West were great presenters.  How does that lovely lady put up with the old curmudgeon, though?

Martin
Logged

derekwarner

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 8,041
  • Location: Wollongong Australia
Re: Aerokit Sea Commander saved from the tip!
« Reply #13 on: May 13, 2016, 01:00:27 PM »

In earlier years, high speed steam propeller's had a pitch equal to the diameter and this was considered state of the requirements to harness the torque of steam engines

In todays world of brushless high current capable motors, such pitch to diameter ratio's have been exceeded to use the available torque

The example below..... :o :o :o

Prop 2blade 38mm x 1.4 pitch 35Amps speed 27kph. is actually 38mm diameter with a pitch ratio of 1.4

So the propeller is actually designated as 38x53.......or ~~53mm pitch............

Another way to consider this is the example propeller has a blade tip to tip cylindrical helical displacement of 53 mm when rotated through 360 degrees ...

Again this 53 mm has no direct bearing in any longitudinal movement of the vessel through the water, nor considers fluid displacement efficiencies etc.... O0

Derek

Logged
Derek Warner

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

Goldcupper

  • Inactive
  • Shipmate
  • *
  • Offline Offline
  • Posts: 23
  • Model Boat Mayhem is Great!
  • Location: Norfolk
Re: Aerokit Sea Commander saved from the tip!
« Reply #14 on: May 13, 2016, 01:05:43 PM »

Ah!  It's a ratio!  Why didn't I think of that?  Thanks, Derek.
All sorted out now.  So we're now over square?
Blimey, that is powerful.


Cheers,
Martin
Logged

AndrewB

  • Shipmate
  • *
  • Offline Offline
  • Posts: 20
Re: Aerokit Sea Commander saved from the tip!
« Reply #15 on: May 18, 2016, 02:19:37 AM »

Sorting out some dips and lines.
Logged

canabus

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 761
  • Boats a hole in the water you pour money into!!!
  • Location: Tasmania,Australia
Re: Aerokit Sea Commander saved from the tip!
« Reply #16 on: May 18, 2016, 03:32:09 AM »

Hi Andrew

I would run the spray rails right to the bow, this will help at low speed and in rough water.

The boat is starting to get her looks back, kept up the good work.
Logged

AndrewB

  • Shipmate
  • *
  • Offline Offline
  • Posts: 20
Re: Aerokit Sea Commander saved from the tip!
« Reply #17 on: May 18, 2016, 03:36:00 AM »

yep that's the plan , cheers

Hi Andrew

I would run the spray rails right to the bow, this will help at low speed and in rough water.

The boat is starting to get her looks back, kept up the good work.
Logged

Goldcupper

  • Inactive
  • Shipmate
  • *
  • Offline Offline
  • Posts: 23
  • Model Boat Mayhem is Great!
  • Location: Norfolk
Re: Aerokit Sea Commander saved from the tip!
« Reply #18 on: May 18, 2016, 09:22:45 AM »

"sorting out dips and lines" means you must have a good eye.
In case you think this bit is taking too long consider this.....When I was clay modelling for BMW we worked on the Range Rover with the "gills" in front of the door.
So keen were BMW "engineers" (all Brummies, btw) to have no twisted surfaces that it took 6 of us 2 weeks to get rid of the lines and dips on the cant rails (bit above the doors) on the final GRP model of the car, a model which finally costed out at just over 3 million DeutscheMarks! (3.12 to the pound at the time).


Martin
Logged

AndrewB

  • Shipmate
  • *
  • Offline Offline
  • Posts: 20
Re: Aerokit Sea Commander saved from the tip!
« Reply #19 on: May 18, 2016, 09:51:07 AM »

Sounds like my sort of job Martin lol
I have a bit of automotive refinishing (bog application and removal   ok2) and cake decorating experience (similar principal to bog application) lol




"sorting out dips and lines" means you must have a good eye.
In case you think this bit is taking too long consider this.....When I was clay modelling for BMW we worked on the Range Rover with the "gills" in front of the door.
So keen were BMW "engineers" (all Brummies, btw) to have no twisted surfaces that it took 6 of us 2 weeks to get rid of the lines and dips on the cant rails (bit above the doors) on the final GRP model of the car, a model which finally costed out at just over 3 million DeutscheMarks! (3.12 to the pound at the time).


Martin
Logged

Goldcupper

  • Inactive
  • Shipmate
  • *
  • Offline Offline
  • Posts: 23
  • Model Boat Mayhem is Great!
  • Location: Norfolk
Re: Aerokit Sea Commander saved from the tip!
« Reply #20 on: May 18, 2016, 10:02:05 AM »

Ah, there you go, you call it bog, we called it "pug",  All the same.  Clay is just a brown wax that never sets. It's all just stuff that has to be first spread, then cleaned off, but where would we be without it, eh?


Martin
Logged

chris1

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 37
  • Model Boat Mayhem is Great!
  • Location: Malta
Re: Aerokit Sea Commander saved from the tip!
« Reply #21 on: June 11, 2016, 06:22:44 PM »

Andrew, what did you use to remove the paint?  Sandpaper and elbow grease, or chemical stripper? Thanks.
Logged

AndrewB

  • Shipmate
  • *
  • Offline Offline
  • Posts: 20
Re: Aerokit Sea Commander saved from the tip!
« Reply #22 on: June 12, 2016, 11:21:00 AM »

Andrew, what did you use to remove the paint?  Sandpaper and elbow grease, or chemical stripper? Thanks.
I used a good quality paint stripper,  and then sand paper.
Logged

chris1

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 37
  • Model Boat Mayhem is Great!
  • Location: Malta
Re: Aerokit Sea Commander saved from the tip!
« Reply #23 on: June 12, 2016, 04:11:02 PM »

Thanks Andrew :-))
Logged

Hornet

  • Shipmate
  • *
  • Offline Offline
  • Posts: 15
  • Model Boat Mayhem is Great!
  • Location: Blackpool
Re: Aerokit Sea Commander saved from the tip!
« Reply #24 on: June 18, 2016, 01:28:53 PM »

Glad you saved it!


I bought one last year, still renovating it! not far from being finished actually! Mainly cosmetic stuff to sort out.
Logged
Pages: [1] 2   Go Up