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Size: 403
Comment: Add bolt stringht and tow-bar option
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← Revision 14 as of 2014-02-23 22:09:15 ⇥
Size: 1798
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 6: | Line 6: |
| * Personal notes and observations 2014. | |
| Line 7: | Line 8: |
| * M16 x 8.8 125kN ?? * M12 x 8.8 67kN ?? |
* M16 x 8.8 - 125kN ?? * M12 x 8.8 - 67kN ?? |
| Line 11: | Line 12: |
| * Can this be used ? {{attachment:PinTowHitch.jpeg}} |
* Tow ball snapped http://www.4x4community.co.za/forum/showpost.php?p=874727&postcount=9 * http://www.arb.com.au/getting-started/ask-arb/recovery/Recovery_points.php * Tow (Pintal) hitch with pin and ball, put pin through loop of rope. || - Not rated. ||<|9>{{attachment:PinTowHitch.jpeg}} || || - If bolt's connecting it to the towbar fail, you have a big piece of metal flying at high speed. || || + Can be made save if used with lanyard connected to rope and differnet point on vehicle. || || + big bolt with a large surface area on rope eye. || || + Quick to assemble, and get to if chassis in sand. || * Recovery hook || + Rated, attached with two bolts. ||<|9> {{attachment:Recovery_Hook_4.5t_load.jpg}} || || + Open, does not need shackel, just hook rope, less metal to fly. || || - If bolts break, hook fly's off on kinetic rope, but as rope slows it can fly off on it's own.|| || install directly on chassis, one on each side, and use bridal (>3m) to spread load over both. || == Accident reports == * http://www.abc.net.au/news/2011-08-21/freak-accident/2848762 * http://www.4x4community.co.za/forum/showpost.php?p=478318&postcount=14 * http://www.youtube.com/watch?v=f8trkgFX6wI&feature=youtu.be * http://www.4x4web.com.au/brettski4x4/CanTeen2007/IMG_6207.jpg * http://nz4wd.co.nz/articles/rated-%E2%80%98r%E2%80%99-recovery |
4x4 Recovery points
- Personal notes and observations 2014.
- Bolts
- M16 x 8.8 - 125kN ??
- M12 x 8.8 - 67kN ??
- Using tow-bar (not tow ball) for recovery ?
http://www.arb.com.au/getting-started/ask-arb/recovery/Recovery_points.php
- Tow (Pintal) hitch with pin and ball, put pin through loop of rope.
- Not rated.
- If bolt's connecting it to the towbar fail, you have a big piece of metal flying at high speed.
+ Can be made save if used with lanyard connected to rope and differnet point on vehicle.
+ big bolt with a large surface area on rope eye.
+ Quick to assemble, and get to if chassis in sand.
- Recovery hook
+ Rated, attached with two bolts.
+ Open, does not need shackel, just hook rope, less metal to fly.
- If bolts break, hook fly's off on kinetic rope, but as rope slows it can fly off on it's own.
install directly on chassis, one on each side, and use bridal (>3m) to spread load over both.
Accident reports
http://www.abc.net.au/news/2011-08-21/freak-accident/2848762
http://www.4x4community.co.za/forum/showpost.php?p=478318&postcount=14
http://www.4x4web.com.au/brettski4x4/CanTeen2007/IMG_6207.jpg
http://nz4wd.co.nz/articles/rated-%E2%80%98r%E2%80%99-recovery
...