welding Props

Message

2F45T4U · #1 Post by **2F45T4U** » Fri Dec 22, 2006 9:06 pm

Will a 130amp MIG welder with 0.8 wire in it weld up a prop shaft and keep it together even with a considerate amount of power going through it?

Adam

DavePoth · #2 Post by **DavePoth** » Fri Dec 22, 2006 9:41 pm

No. To make the weld strong enough you'd need to use a lot of weld, which would unbalance the prop. not good. if it breaks you'll have a scaffolding pipe slamming against the floor of your car a few thousand times a minute and it won't take it that long to smash through.

Whather that's before or after it has dug itself into the road and flipped you over is another matter.

george · #3 Post by **george** » Fri Dec 22, 2006 10:38 pm

you've not seen mythbusters then have you if a v8 with a tad more power than adams thinking about wont do it then it's mythbusted !!!!
but adam you really musn't think about that your'e thinking about
it needs to be stick welded and rebalanced after
i know a man that can !

2F45T4U · #4 Post by **2F45T4U** » Fri Dec 22, 2006 10:42 pm

Ooooh, you around tommorow and are you feeling strong?

Theres a prop shaft place by me, behind Day's in neath. I'l go talk to them when they re-open in the new year.

george · #5 Post by **george** » Fri Dec 22, 2006 10:49 pm

yes but after 12:30 ish must earn my daily crust

is that barprops ?

2F45T4U · #6 Post by **2F45T4U** » Fri Dec 22, 2006 11:02 pm

Yer its BAR props. Are prop shops few and far between?

SprintV8 · #7 Post by **SprintV8** » Sat Dec 23, 2006 12:10 am

it needs to be stick welded and rebalanced after

I'll go along with being rebalanced after but they can be migged.

Company that done my old RWD prop's used a lathe set on a very slow speed to turn the prop whilst mig welded up.

2F45T4U · #8 Post by **2F45T4U** » Sat Dec 23, 2006 12:21 am

If it's expensive to get made up I'll have a go, then attatch a device to catch the prop if it does unexpectiedly break, similar to a tennis racket with no strings

SprintV8 · #9 Post by **SprintV8** » Sat Dec 23, 2006 12:28 am

I wouldn't even attempt welding a prop myself and I've been welding since before you been born.

Lewis · #10 Post by **Lewis** » Sat Dec 23, 2006 12:28 am

attatch a device to catch the prop if it does unexpectiedly break

......commonly known as a driveshaft hoop and found on most modified American cars.

Still gives you a bloody terrifying experience when one goes beneath ya - it's when it gets into the cabin that it becomes an issue

And yea, not something I'd try myself. One of the guys on our RR forum did one and got the joints incorrect (had 'em in phase), prop smashed itself to bits after a few hundred miles. He did some very nice welding, all the same.

2F45T4U · #11 Post by **2F45T4U** » Sat Dec 23, 2006 12:43 am

Ok point taken. I'll see the man

DavePoth · #12 Post by **DavePoth** » Sat Dec 23, 2006 12:46 pm

george wrote:you've not seen mythbusters then have you if a v8 with a tad more power than adams thinking about wont do it then it's mythbusted !!!!
but adam you really musn't think about that your'e thinking about
it needs to be stick welded and rebalanced after
i know a man that can !

Just trying to scare him George

. I'd think the power-weight ratio would be a lot higher in a dolly, so it might be a bit more possible.

ALGIK · #13 Post by **ALGIK** » Mon Dec 25, 2006 11:20 am

Was at a rolling road a few years ago in Daventry ( Daventry rolling road as it happens) on power the car snapped its prop came through the car and smashed the guys arm that was doing the run
Was not a pritty sight
Get it done professionally
Work out how fast the prop turns at 7000 rpm engine speed in top gear
you will not comprehend it ....

Mr.Speedy · #14 Post by **Mr.Speedy** » Fri Dec 29, 2006 7:17 pm

Where's the rolling road in Daventry?
I'm only in Braunston and i'm gonna wanna get the Sprintfire rolling road tuned and dyno'd.