Re: Plate Aluminium Wake Boat - Engine Rebuild

Postby 82Juddcraft » Tue Apr 18, 2017 8:42 pm

MACH6 wrote:I had it all lined up to take the boat this weekend but it looks like something is conspiring to keep me from getting some barding done.
After setting the idle all good on Thursday arvo, my left knee started being a bit sore for no good reason, i couldn't walk next day and 24 hours later I was in emergency getting getting a infected knee drained. Now I have just come out of the first of a couple of surgeries to clean the sucker out. Looking like a week's stay in hospital. WTF! On a long weekend too.
IMG_20170415_143730-756x1008.jpg

That's no good
How's it feeling today?
82Juddcraft
540
 
Posts: 268
Joined: Sat Jan 09, 2016 10:46 pm
Has thanked: 95 times
Been thanked: 17 times

Re: Plate Aluminium Wake Boat - Engine Rebuild

Postby MACH6 » Wed Apr 19, 2017 8:35 am

Yeah Will, bit of a weird thing to take me out for a long weekend. Thanks for the kind thoughts.

I can put weight on the knee now but when the sweet drugs run out, it feels like the inside of my knee was blasted with pressure cleaner. I just need to be on the ball and keep them good pain killers flowing into me. I'm stuck in bed for the short term with these machines keeping my knee cool and the blood flowing.

Looks like at least another 14 days on intravenous antibiotics with hopefully a bit of that time being in home care.
IMG_20170417_222255-604x805.jpg
You do not have the required permissions to view the files attached to this post.
User avatar
MACH6
540
 
Posts: 299
Joined: Thu May 20, 2010 12:00 am
Location: North Brisbane
Has thanked: 3 times
Been thanked: 19 times

Re: Plate Aluminium Wake Boat - Engine Rebuild

Postby Feetfirst » Wed Apr 19, 2017 3:40 pm

NOOOOOOooooooo, I want to know how the 5 blade prop performs.......
Feetfirst
Tantrum
Skicraft Owner
 
Posts: 121
Joined: Fri Jun 10, 2016 8:55 am
Location: Bargara
Has thanked: 9 times
Been thanked: 30 times

Re: Plate Aluminium Wake Boat - Engine Rebuild

Postby Feetfirst » Tue Apr 25, 2017 10:49 am

Hey MACH6, how's the knee going?? I hope someone has snuck in a beer for Anzac Day for you.
Feetfirst
Tantrum
Skicraft Owner
 
Posts: 121
Joined: Fri Jun 10, 2016 8:55 am
Location: Bargara
Has thanked: 9 times
Been thanked: 30 times

Re: Plate Aluminium Wake Boat - Engine Rebuild

Postby MACH6 » Thu Apr 27, 2017 6:31 pm

You and me both feety....... I'm super keen just to see what it does with 1200kg of ballast in the boat.

I can walk now but I'm still in hospital. Trying to get out and organise home care as I'm still on IV drugs. Will be on antibiotics for at least 6 weeks, maybe more.

This place is doing my head in!
User avatar
MACH6
540
 
Posts: 299
Joined: Thu May 20, 2010 12:00 am
Location: North Brisbane
Has thanked: 3 times
Been thanked: 19 times

Re: Plate Aluminium Wake Boat - Engine Rebuild

Postby 82Juddcraft » Thu Apr 27, 2017 8:26 pm

I spose theres only so much xbox u play lol
82Juddcraft
540
 
Posts: 268
Joined: Sat Jan 09, 2016 10:46 pm
Has thanked: 95 times
Been thanked: 17 times

Re: Plate Aluminium Wake Boat - Engine Rebuild

Postby ash-on-mtb » Fri Apr 28, 2017 6:51 am

mate thats terrible news, I guess its good that it was caught in time?! Hopefully see some pics of the boat out on the water soon enough.
ash-on-mtb
Blind 3
 
Posts: 415
Joined: Sat Feb 21, 2009 11:00 pm
Location: Melbourne
Has thanked: 2 times
Been thanked: 2 times

Re: Plate Aluminium Wake Boat - Engine Rebuild

Postby MACH6 » Sun Jun 25, 2017 9:06 pm

She's back on the water with the new prop.....

My knee is still not 100% but it was a bloody nice day so we put in at the Pine and went for a fang out on Moreton Bay around to Redcliffe and stopped at the Sunday markets for lunch.
IMG_20170625_122552-001.jpg

We then went and did some testing on the way home for RPM/Speed calculations and maneuvering tests.

We are getting 36.5 MPH at 4500RPM (no ballast) which is about 22% slip and we are doing 22MPH at 2800 RPM with tanks full. All good results.

She bloody jumps out of the hole now, even when loaded and does not get any prop slip in hard high power turns any more. Still need to try sacking it for wake surfing to see how it handles the high alpha/high load condition.

Really happy with this 5 blade, super smooth even with the reduced tip clearances to the hull.
You do not have the required permissions to view the files attached to this post.
User avatar
MACH6
540
 
Posts: 299
Joined: Thu May 20, 2010 12:00 am
Location: North Brisbane
Has thanked: 3 times
Been thanked: 19 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby MACH6 » Thu Dec 21, 2017 8:55 pm

So been a while since i have been around here, bloody work and beeing a cripple has slowed me down a bit.

The new engine is working a bloody treat. Damn it has some serious torque it is a totally new boat with this donk in it, she pulls like a demon....

Been out for a arvo session and sacked it down with a total of 990kg of ballast. It was good..... :dance:

IMG_20171126_111136.jpg

IMG_20171126_111151.jpg


Oh man it was AWESOME!!!!!

It was sacked out more than we would for surfing and she just popped up on the plane like it was nothing.... Good day it was....

The next week I took it out and threw all the team from work around all day. The ski tube got a work out, lots of full throttle action happening.
https://www.facebook.com/1146627815368184/videos/1739585806072379/

At the end of the day she started to make some unusual noises when giving it full stick, thought it was just air-ration from the prop and giving it sooooo much power getting the guys off the ski tube.


Went up to Noosa river last week and did a hoon all the way up and back. Just as I'm crossing the cable ferry we hear a pretty average noise from the back of the hull under power....

Pulled her out and we find the bloody prop skeg is sheared off... WTF?
IMG_20171221_102440.jpg

IMG_20171221_104922.jpg


I am surprised we got back to shore, I would have thought the prop shaft would have snapped and gone to the bottom....


That canned that weekend :|
You do not have the required permissions to view the files attached to this post.
Last edited by MACH6 on Thu Dec 21, 2017 9:27 pm, edited 2 times in total.
User avatar
MACH6
540
 
Posts: 299
Joined: Thu May 20, 2010 12:00 am
Location: North Brisbane
Has thanked: 3 times
Been thanked: 19 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby MACH6 » Thu Dec 21, 2017 9:22 pm

Oh well, time to get back to making/fixing stuff.

Looks like the crack was around for a while before she gave way. Typically just after the weld where the aluminium was heat effected from welding.

And the fix began. got some 25mm plate that I had leftover from the fwd fin and went to work with it. I am going to have to burrow the old man's welder and see what I can do to fix her up.
IMG_20171221_162624.jpg

IMG_20171221_163308.jpg

IMG_20171221_165721.jpg
You do not have the required permissions to view the files attached to this post.
User avatar
MACH6
540
 
Posts: 299
Joined: Thu May 20, 2010 12:00 am
Location: North Brisbane
Has thanked: 3 times
Been thanked: 19 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby Dickj83 » Fri Dec 22, 2017 7:37 am

Oh bummer. At least alloy is easy to weld back up!
I've got a 20mm skeg on mine with the dimensions shown in the photo for reference.
From what i can remember it doesnt quite meet commercial standards but i havent had a problem with it (touch wood).
Hope you are back on the water asap.
You do not have the required permissions to view the files attached to this post.
User avatar
Dickj83
Tantrum
 
Posts: 116
Joined: Mon Jan 10, 2011 11:00 pm
Location: Adelaide / White Sands
Has thanked: 16 times
Been thanked: 21 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby 82Juddcraft » Fri Dec 22, 2017 7:41 am

MACH6 wrote:So been a while since i have been around here, bloody work and beeing a cripple has slowed me down a bit.

The new engine is working a bloody treat. Damn it has some serious torque it is a totally new boat with this donk in it, she pulls like a demon....

Been out for a arvo session and sacked it down with a total of 990kg of ballast. It was good..... :dance:

IMG_20171126_111136.jpg

IMG_20171126_111151.jpg


Oh man it was AWESOME!!!!!

It was sacked out more than we would for surfing and she just popped up on the plane like it was nothing.... Good day it was....

The next week I took it out and threw all the team from work around all day. The ski tube got a work out, lots of full throttle action happening.
https://www.facebook.com/1146627815368184/videos/1739585806072379/

At the end of the day she started to make some unusual noises when giving it full stick, thought it was just air-ration from the prop and giving it sooooo much power getting the guys off the ski tube.


Went up to Noosa river last week and did a hoon all the way up and back. Just as I'm crossing the cable ferry we hear a pretty average noise from the back of the hull under power....

Pulled her out and we find the bloody prop skeg is sheared off... WTF?
IMG_20171221_102440.jpg

IMG_20171221_104922.jpg


I am surprised we got back to shore, I would have thought the prop shaft would have snapped and gone to the bottom....


That canned that weekend :|
It looks like stress from movement left to right.
Not much give in aluminium, just shatters ey?

Sent from my SM-G950F using Tapatalk
82Juddcraft
540
 
Posts: 268
Joined: Sat Jan 09, 2016 10:46 pm
Has thanked: 95 times
Been thanked: 17 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby MACH6 » Fri Dec 22, 2017 9:51 am

I am not sure which way the crack went from but I think it had been there a while before it gave way. When I was out dragging everyone around to the ski tube it was making an unusual noise at times and I think it was that crack causing some harmonics through the hull. I bet that the running into a sand bank when we messed up the old prop and nearly doubling the HP didn't help it either.

This is pretty typical of a stress crack in this type of aluminium as it is cold rolled 5083 and it is ridiculously strong. It cracked right at the interface with the weld which is the spot where the weld has reduced the strength of the material from heat effecting it. In hind site, I should have made the skeg with a bit more material in it but I didn't have any other 17mm stock other than that bit that I used.

Now I get to re-engineer it and make it better :wink:
User avatar
MACH6
540
 
Posts: 299
Joined: Thu May 20, 2010 12:00 am
Location: North Brisbane
Has thanked: 3 times
Been thanked: 19 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby mof » Fri Dec 22, 2017 8:07 pm

Can you realistically get some pre-heating into it before welding? May help.
User avatar
mof
Toe 720
 
Posts: 800
Joined: Tue Mar 08, 2005 11:00 pm
Location: Sydney
Has thanked: 5 times
Been thanked: 21 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby MACH6 » Sun Dec 24, 2017 11:42 am

Nah pre hearing will only help with warping a little bit, does nothing to stop the localised heat treatment from the weld.

We got under there and welded it up yesterday, now I have to pull the shaft back and recondition the packing gland as its seal seems to have been damaged when the skeg broke.
IMG_20171223_112008_1-800x600.jpg

IMG_20171223_111856-800x600.jpg

IMG_20171223_131511-800x600.jpg

IMG_20171223_131501-800x600.jpg
You do not have the required permissions to view the files attached to this post.
User avatar
MACH6
540
 
Posts: 299
Joined: Thu May 20, 2010 12:00 am
Location: North Brisbane
Has thanked: 3 times
Been thanked: 19 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby MACH6 » Wed Dec 27, 2017 4:31 pm

IMG_20171223_114035.jpg

IMG_20171223_114025.jpg

IMG_20171223_112008.jpg
You do not have the required permissions to view the files attached to this post.
User avatar
MACH6
540
 
Posts: 299
Joined: Thu May 20, 2010 12:00 am
Location: North Brisbane
Has thanked: 3 times
Been thanked: 19 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby MACH6 » Wed Dec 27, 2017 5:06 pm

So the packing gland is shot and leaking... Have found that the garter springs in the seal that hold a bit of tension on the lip have corroded and let go. All of the bearing shops are closed over Christmas/new years so I guess I will have to make my own replacement springs.
Designed and printed them out of Thermoplastic Polyurethane> 5th version provided the correct dimensions for the seal on the shaft
IMG_20171227_131317-001.jpg

IMG_20171227_144413-001.jpg

IMG_20171227_145033-001.jpg

IMG_20171227_150943-001.jpg

IMG_20171227_151150-001.jpg
You do not have the required permissions to view the files attached to this post.
User avatar
MACH6
540
 
Posts: 299
Joined: Thu May 20, 2010 12:00 am
Location: North Brisbane
Has thanked: 3 times
Been thanked: 19 times

Re: Plate Aluminium Wake Boat - New 5 Blader Prop

Postby mof » Wed Jan 03, 2018 3:16 pm

Nice work. Clever work-around
User avatar
mof
Toe 720
 
Posts: 800
Joined: Tue Mar 08, 2005 11:00 pm
Location: Sydney
Has thanked: 5 times
Been thanked: 21 times

Previous


  • Advertisement

Who is online

Users browsing this forum: Google [Bot] and 22 guests