Model Boat Mayhem - Forum

Please login or register.

Login with username, password and session length.
Pages: 1 2 3 [4]   Go Down

Author Topic: XRAD'S 40 inch open steam launch  (Read 9551 times)

Baldrick

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 138
  • Model Boat Mayhem is Great!
  • Location: Sudergeona (Perfideous Albion)
Re: XRAD'S 40 inch open steam launch
« Reply #75 on: July 05, 2017, 09:03:16 PM »

Like this?


 Yay that looks good, like it
Logged
Ship Modelling;
Is it a craft ?
Is it an Art ?
Is it therapy for the bewildered ?

xrad

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 420
  • Model Boat Mayhem is Great!
  • Location: Ohio USA
Re: XRAD'S 40 inch open steam launch
« Reply #76 on: July 06, 2017, 02:01:03 AM »

yeah, that look nice.  I like the red. I was considering painting a bit of the stack and the engine, but can't decide on color...grey, green, red....  I will wait until hull is painted and decide.  Engine is easy to remove, and so is stack, to paint down the road if wanted.


Finished the condenser and wood mount, and ran exhaust pipe into stack. Hopefully, it is tall enough that most liquid not condensed in can runs back down into can, and not too much down into boiler. The exhaust pipe extends a few inches up inside the stack.


PS: 'Baldric' = Tony Robinson?  :-))  I'm a Black Adder fan, especially the early episodes.....and Hugh Laurie in BA and Jeeves and Wooster.. Great and funny actors...
Logged

xrad

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 420
  • Model Boat Mayhem is Great!
  • Location: Ohio USA
Re: XRAD'S 40 inch open steam launch
« Reply #77 on: July 09, 2017, 10:58:24 PM »

Some paint applied.  Not so happy with the Rustoleum green gloss.  You have to be very careful when applying so as not to create drips.  Seems to be an exponential application curve...all looks fine with several light coats, then all of a sudden, it pools and runs. I suspect the solvent releases the underlying paint even though instruction say you can apply several light coats within first hour.  Had to redo a few areas. Also, even with a good sanding of hull, primer, and alcohol wipe, several pinhole areas developed likely due to retained mould release agent in the fiberglass.  these were all fixed.  I also added five coats of 2X rustoleum gloss which went on great.  It did not affect the green and coated very well.  Have to do a bit of touch up along the lower rub rail as some paint came off with the tape.   Spent some time chasing dust hairs in the paint as I was painting in the garage.  Everything shows up on dark surface.
Logged

xrad

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 420
  • Model Boat Mayhem is Great!
  • Location: Ohio USA
Re: XRAD'S 40 inch open steam launch
« Reply #78 on: July 16, 2017, 02:23:07 PM »

starting to all come together....the complex deck curves really show nicely.  main steam line to engine, gas line and one servo/radio battery install to go.....and almost forgot, have to make the wheel...and finish cockpit caprail...


hard to show the true hull color...will have to get some outside pics when done.
Logged

xrad

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 420
  • Model Boat Mayhem is Great!
  • Location: Ohio USA
Re: XRAD'S 40 inch open steam launch
« Reply #79 on: July 16, 2017, 10:36:10 PM »

Logged

Baldrick

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 138
  • Model Boat Mayhem is Great!
  • Location: Sudergeona (Perfideous Albion)
Re: XRAD'S 40 inch open steam launch
« Reply #80 on: July 17, 2017, 01:41:14 PM »

That looks great , lovely looking launch. At very much a guess an all up weight of 6Kg and with that PM 8 engine it will scare the hell out of the ducks on the pond if you let it rip.
Logged
Ship Modelling;
Is it a craft ?
Is it an Art ?
Is it therapy for the bewildered ?

xrad

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 420
  • Model Boat Mayhem is Great!
  • Location: Ohio USA
Re: XRAD'S 40 inch open steam launch
« Reply #81 on: August 13, 2017, 02:39:28 AM »

Thx Baldrick!


Had to replace the plastic universal joint due to binding. Made my own universal.  Standard dog bone joint made from bronze rod and hardened steel pin /ball (removed from kyosho RC car axle). Easy to make. 3/8th bore on both ends and oversized pocket for pin ball. Pin ball is pressed onto shaft and lightly peened in place. It's tight enough and not going to come loose. If it does, I will silver solder it. Grooves for pin slightly oversized. This allows about 1mm or so of play so that the prop shaft and motor output shaft don't have to be perfectly aligned axially.  3mm grub screws. Plus, now the propshaft does not put any axial pressure on the motor driveshaft .
Logged

KNO3

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,130
  • Location: Vienna
Re: XRAD'S 40 inch open steam launch
« Reply #82 on: August 13, 2017, 02:02:58 PM »

Nice. What exactly was the problem with the universal joint?
Logged

xrad

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 420
  • Model Boat Mayhem is Great!
  • Location: Ohio USA
Re: XRAD'S 40 inch open steam launch
« Reply #83 on: August 13, 2017, 02:09:01 PM »

the motor drive shaft and the prop shaft did not line up exactly as the motor mount settled a bit during glue-in (so that the 'projected' shafts did not meet exactly in the middle of the universal joint no matter how the universal was positioned) .  I tried re-positioning the motor, but that did not work. Motor shaft and prop shaft are true. Additionally, I had to bore the universal brass ends to 3/8th. the plastic squirmed a bit in the lathe so the holes were off just a tad.  The combination of these two issues caused binding and prop shaft wobble. The new dog-bone has enough play that shaft alignment is not an issue and prop shaft and motor shaft run smoothly.
Logged

xrad

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 420
  • Model Boat Mayhem is Great!
  • Location: Ohio USA
Re: XRAD'S 40 inch open steam launch
« Reply #84 on: August 13, 2017, 11:28:05 PM »

Cap rail cut, steam bent, and stained. This cap sits on top of mahogany laminated ply frame w/one layer on inside of cockpit, and two layers on outside(image post 79). Will get PU coat tomorrow.  Cap rail has a splash lip that overhangs outside cockpit combing just a bit. Gives the rail a nice shadow and makes for a more substantial appearance. Dust all over deck.  Nearly feels like a full size launch!
Logged

derekwarner_decoy

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,926
  • Location: Wollongong Australia
Re: XRAD'S 40 inch open steam launch
« Reply #85 on: August 14, 2017, 01:05:22 AM »

Yes that shadow does give a nice illusion  %) of the repeated deck level cap-lip ...I had to go back to image .1461 to confirm that it wasn't there before.........

Yes as you say 'dust on the deck'......this just shows that the camera has better eyes than we have  O0

Derek
Logged
Derek Warner

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

KBIO

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 80
  • Location: Dinan (France)
Re: XRAD'S 40 inch open steam launch
« Reply #86 on: August 15, 2017, 06:03:10 PM »

Hello!
Very nice boat to look at! :-))
Cheers.
Logged
I do not take it very seriously!

southsteyne2

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 189
Re: XRAD'S 40 inch open steam launch
« Reply #87 on: August 15, 2017, 11:40:38 PM »

I have used these http://www.ebay.com.au/itm/5mm-to-8mm-CNC-Motor-Shaft-Flexible-Coupling-Coupler-for-3D-Printer-5mmx8mm for years and never had a problem ( and please Derek no academic comments regarding torque strength and durability after all these are models.
Cheers
John
Logged

derekwarner_decoy

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,926
  • Location: Wollongong Australia
Re: XRAD'S 40 inch open steam launch
« Reply #88 on: August 16, 2017, 01:59:27 AM »

Well dam you guys over there make some good 'Dogs & Bones'..I reckon this set in your steam drive line could handle a few thousand scale kW  and a few degrees of offset or misalignment  {-)

So sitting here in the middle of South Australia this morning...not much more to do than read Text Books...but we needn't bother southsteyene2 with anything from the datasheets..... %) ...afterall, these are only models

Derek
Logged
Derek Warner

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

xrad

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 420
  • Model Boat Mayhem is Great!
  • Location: Ohio USA
Re: XRAD'S 40 inch open steam launch
« Reply #89 on: August 16, 2017, 12:56:05 PM »

Kyosho 'swing' shaft. hexagonal rod with slip on pin balls at each end. 5$ at hobby store. I pulled off pin ball and pressed on to bronze universal.   Looks better than the plastic universal!
Logged

xrad

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 420
  • Model Boat Mayhem is Great!
  • Location: Ohio USA
Re: XRAD'S 40 inch open steam launch
« Reply #90 on: Yesterday at 01:27:29 AM »

final coat of cockpit semi-gloss poly U.   Waiting on a few RB07540 handrail shorty stanchions from Cornwall. At ~.50$ each, cheaper to buy than to make.... Another few coats of gloss poly on the deck and throttle servo install and ready for the lake..

and have to name her.....
Logged
Pages: 1 2 3 [4]   Go Up