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Buzz View Drop Down
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Posts: 101 		Post Options Post Options   Quote Buzz Quote  Post ReplyReply Direct Link To This Post Topic: Prop Guards
    Posted: 24 Oct 11 at 4:07pm
Does anyone use prop guards on their safetyboats?
 
If so does it make much difference to manoeuvrability?
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radixon View Drop Down
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Posts: 2407 		Post Options Post Options   Quote radixon Quote  Post ReplyReply Direct Link To This Post Posted: 24 Oct 11 at 4:16pm
We have prop guards on all centre tiller steer boats, doesnt make that much difference, but we are doing a lot more rescues getting people out the water ie raft building, capsized boats, windsurfers, kayakers, than the typical sailing club would do with sailors that are competent.

Not used one on a rib, but performance wise, you might not notice the difference. All depends why you are thinking of fitting one.
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Andymac View Drop Down
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Posts: 852 		Post Options Post Options   Quote Andymac Quote  Post ReplyReply Direct Link To This Post Posted: 24 Oct 11 at 6:00pm
We had a little discussion on this a couple of years back...
http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=5993&KW=maib&PID=1058284&title=saftey-boats-prop-guards#1058284
 
Certainly no harm in resurrecting the topic, given the H & S implications.
 
EDIT; My original link to the MAIB report appears to be dead now, but should still be available out there somewhere.


Edited by Andymac - 24 Oct 11 at 6:03pm
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G.R.F. View Drop Down
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Posts: 4028 		Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 24 Oct 11 at 8:21pm
We got a new rescue boat this year, they didn't fit a prop guard, noticed the three blade prop now has barely two and a half blades..
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Neptune View Drop Down
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Posts: 1314 		Post Options Post Options   Quote Neptune Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct 11 at 8:56am
Originally posted by G.R.F.

We got a new rescue boat this year, they didn't fit a prop guard, noticed the three blade prop now has barely two and a half blades..

You all that tough in Kent that limbs can mash a prop up or is it from ramming it up the beach?
Musto Skiff and Solo sailor
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct 11 at 9:48am
The prop guards I've seen don't look particularly good at keeping shingle out.
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G.R.F. View Drop Down
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Posts: 4028 		Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct 11 at 10:03am
Originally posted by Neptune

Originally posted by G.R.F.

We got a new rescue boat this year, they didn't fit a prop guard, noticed the three blade prop now has barely two and a half blades..

You all that tough in Kent that limbs can mash a prop up or is it from ramming it up the beach?

a)We chew them off with our teeth

b)We have muppets that leave the engine running as they charge the beach.



One of the above is true.


tbh The engine they matched to the boat isn't powerful enough, it's a 20hp four stroke which doesn't quite have the oomph a two stroke has and is heavier, with a prop guard it would be unlikely to get the boat on the plane.


Edited by G.R.F. - 25 Oct 11 at 10:05am
https://www.ease-distribution.com/
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Contender443 View Drop Down
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Posts: 1211 		Post Options Post Options   Quote Contender443 Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct 11 at 1:20pm
Originally posted by G.R.F.

Originally posted by Neptune

Originally posted by G.R.F.

We got a new rescue boat this year, they didn't fit a prop guard, noticed the three blade prop now has barely two and a half blades..

You all that tough in Kent that limbs can mash a prop up or is it from ramming it up the beach?

a)We chew them off with our teeth

b)We have muppets that leave the engine running as they charge the beach.



One of the above is true.


tbh The engine they matched to the boat isn't powerful enough, it's a 20hp four stroke which doesn't quite have the oomph a two stroke has and is heavier, with a prop guard it would be unlikely to get the boat on the plane.
At Lancing our boats have no prop guards as they reduce power and may get shingle caught in them.
We use 30hp engines with electric tilt. So when coming into the beach they are driven with power while gradually lifting the engine. Once the bow hits the beach the kill cord is pulled. At the same time the beach crew (all the sailors) then get the boat out of the water and onto the trailer.
 
We don't eat too many props this way but if we do it is an accepted cost. I will point out that we only need to use this method about once a month as it is not always that bad.
 
We did however have some one try to come in the other day with not enough power on and they capsized the rib.
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ham4sand View Drop Down
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Posts: 452 		Post Options Post Options   Quote ham4sand Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct 11 at 2:08pm
howw do you capsize a rib??!??!?!?!!
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Buzz View Drop Down
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Posts: 101 		Post Options Post Options   Quote Buzz Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct 11 at 2:15pm

Thank you for the help.

We are having similar problems in that people forget to lift the engine sufficiently when approaching the shore. What has prompted the prop guard issue is that the last episode resulted in the prop hitting the bottom and the force was transmitted into the gearbox which was ruined. Result - we had to buy a new engine. Prop guards are more to protect people in the water than the prop.  We plan a brief refresher course for all rib drivers before they drive the rib with the new (75hp) engine.  
 
How did you capsize a rib coming into the shore?


Edited by Buzz - 25 Oct 11 at 2:20pm
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