Reply
 
Thread Tools Search this Thread
 
Old 04 June 2010, 14:44   #1
Member
 
Country: Other
Make: Quicksilver
Length: 3m +
Engine: Outboard, Yamaha 8hp
Join Date: May 2010
Posts: 10
Safety (Guard vs. Propeller)

Hi,

I was reading the forum and some other sites about the pros and cons of apparatus so called propeller guards (what I'm looking for is a guard against the propeller actually ), then I came across with this:

http://www.abc.net.au/tv/newinventors/txt/s2736928.htm

What do you think?

Q

PS: I couldn't find one, but if there's already a thread about this please redirect me : )
__________________

__________________
Question is offline   Reply With Quote
Old 04 June 2010, 18:21   #2
RIBnet supporter
 
donegaldan's Avatar
 
Country: Ireland
Town: Donegal
Boat name: Deep Six
Make: Redbay Stormforce
Length: 6m +
Engine: Suzuki 140 4/stroke
Join Date: Mar 2008
Posts: 175
Send a message via Skype™ to donegaldan
rubber prop ??

Nice find.

Wonder what the performance is like v's ali and stainless.
Be interesting to see if it ever makes it to market.
handy for safety boats, and might even save a gear box or two.
be interested to see has anyone seen of them before.

God I'm full of questions on a friday night....
DonegalDan
__________________
donegaldan is offline   Reply With Quote
Old 05 June 2010, 01:54   #3
Member
 
SeaSkills's Avatar
 
Country: UK - Scotland
Town: Oban (mostly)
Make: Ribcraft, Humber,BWM
Length: 5m +
Engine: Outboards
Join Date: Jan 2008
Posts: 632
Send a message via Skype™ to SeaSkills
There was some talk of this when I was in Western Australia before Christmas. It certainly sounds interesting. There is some more information and discussion here; http://rbbi.com/pgic/ptech/safetypro...ypropeller.htm

I won't be rushing out to get one until it's been tried and tested, but I do think this worth watching

Ian
__________________
SEASKILLS TRAINING
Web; www.seaskills.co.uk
Email; info@seaskills.co.uk
Tel; 07525 012 013
SeaSkills is offline   Reply With Quote
Old 05 June 2010, 09:00   #4
Member
 
Simon B's Avatar
 
Country: UK - England
Town: Leicester
Boat name: Vixen
Make: Ribcraft
Length: 6m +
Engine: Suzuki OB 175
MMSI: 235071839
Join Date: Jun 2004
Posts: 1,621
Looked like a large leading edge so pressure is reduced. This would lead to less slicing of the water also. My initial guess would be a big drop in efficiency/performance. It'll spin as fast yes but not deliver.

The key is training and awareness, divers operate near props but accidents are rare. If you are really concerned a jet is the best option however expect a 25-30% in hp and a corresponding hike in fuel use.

My lottery fantasy boat has jets of course!
__________________
New boat is here, very happy!
Simon
www.luec.org
Simon B is offline   Reply With Quote
Old 05 June 2010, 12:42   #5
Member
 
Country: Other
Make: Quicksilver
Length: 3m +
Engine: Outboard, Yamaha 8hp
Join Date: May 2010
Posts: 10
Quote:
Originally Posted by Simon B View Post
... jet is the best option however expect a 25-30% in hp and a corresponding hike in fuel use...
A jet would only be a long term project for us either, thus it seems I'll stick with conventional prop guards for now.

Thanks for the replies.

Best

Q
__________________
Question is offline   Reply With Quote
Old 05 June 2010, 18:00   #6
Member
 
Country: UK - England
Town: Southampton
Boat name: Tornado
Make: Ribcraft
Length: 7m +
Engine: 250hp Suzuki
Join Date: Feb 2010
Posts: 133
Hooray what a great idea! would love to see and trial one just to see what the performance is like, and find out how much they cost. Any one find a price for one anywhere ? or if they are available in the UK?
__________________
sarahscottiedog is offline   Reply With Quote
Old 06 June 2010, 12:06   #7
Member
 
Simon B's Avatar
 
Country: UK - England
Town: Leicester
Boat name: Vixen
Make: Ribcraft
Length: 6m +
Engine: Suzuki OB 175
MMSI: 235071839
Join Date: Jun 2004
Posts: 1,621
A long time ago we tried one of these;

Propguard

It got destroyed before I could get a realistic experience of of good or bad it was.
__________________
New boat is here, very happy!
Simon
www.luec.org
Simon B is offline   Reply With Quote
Old 06 June 2010, 12:56   #8
Member
 
Country: UK - England
Town: Southampton
Boat name: Tornado
Make: Ribcraft
Length: 7m +
Engine: 250hp Suzuki
Join Date: Feb 2010
Posts: 133
SO how did it "get destroyed" ? Operator error ? or failure ?
__________________
sarahscottiedog is offline   Reply With Quote
Old 06 June 2010, 13:28   #9
Member
 
Simon B's Avatar
 
Country: UK - England
Town: Leicester
Boat name: Vixen
Make: Ribcraft
Length: 6m +
Engine: Suzuki OB 175
MMSI: 235071839
Join Date: Jun 2004
Posts: 1,621
Operator error most definitely, they got to close to rocks and were pushed against them by the waves. We did not re-fit another one and it is still my worst nightmare as a dive boat handler. All commercial dive ribs I've seen do not have prop guards either.
__________________
New boat is here, very happy!
Simon
www.luec.org
Simon B is offline   Reply With Quote
Old 09 June 2010, 05:58   #10
Member
 
boristhebold's Avatar
 
Country: UK - England
Length: 7m +
Join Date: Aug 2009
Posts: 1,293
Quote:
Originally Posted by Question View Post
Hi,

I was reading the forum and some other sites about the pros and cons of apparatus so called propeller guards (what I'm looking for is a guard against the propeller actually ), then I came across with this:

http://www.abc.net.au/tv/newinventors/txt/s2736928.htm

What do you think?

Q

PS: I couldn't find one, but if there's already a thread about this please redirect me : )

I cant see how it would work, I dont fancy sticking my arm in tio find out
__________________

__________________
boristhebold is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 23:48.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.