 |
|
13-01-2007, 11:16 AM
|
#41
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
3 for sure
__________________
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
13-01-2007, 12:04 PM
|
#42
|
|
hello
Join Date: Mar 2004
Posts: 2,739
|
In my opinion then you should be fine as long as the bolts are changed periodically to avoid fatigue failures, every X number of hours (anyone got a figure for this?) Also torqued up correctly. Don't over tighten them, the tighter you do them up the more you eat into the 70,000 PSI of tensile strength you're relying on to keep your motor attached to your boat. Once again this would require regular checking. If they become loose they will rattle around and be subjected to shock loading (slide hammer) which over time could weaken and break a bolt. The play in the midsecion should be kept to a minimum too as this could have a similar effect. The load should also be spread over a large area either with big washers or a transom plate of some sort.
__________________
|
|
|
|
|
13-01-2007, 12:24 PM
|
#43
|
|
Registered User
Join Date: Jan 2007
Posts: 35
|
I am going to assume that you guys are talking about bolting on your "clamp-on" outboard motors. Fine thread will have more strength at the threads, but...again...what you are trying to hold...ie your outboard that weighs about 400 pounds...is NOT going to break or pull apart a 1/2 in bolt...little on 4 of them...especially when the bolts are torqued down. Once you are torqued down, come in behind the standard nut and ad a "jam" nut with about 40 pounds feet on it. It will NOT vibrate loose...but you will cuss it whenever you get ready to remove it because it will not want to back up...even with force. When I had outboards..running a seriously modified 225 Mercury from Land & Sea, with a shot of nitrous, I used 1/2 in bolts that were about 6 inches long. Actually, I had 6 of them and never had a problem. Titanium...never considered it...but what you really need to do is use "whatever" makes you warm and fuzzy. Pay the price and dont fuss. As for what Mercury does, they use what they consider to be the better of the 2, but they are also facing a liability issue that you are not.
Offer is still good...I am in Fort Worth, Texas, USA...I will get for you whatever bolt you want and send it over.
And NO...The SR71 was NOT made with Russian materials...lmao...where in the Hell did you ever come up with that? I am a retired pilot...32 years in the cockpit with USAF service in The Nam flying F4-Phantoms.
|
|
|
|
|
13-01-2007, 12:41 PM
|
#44
|
|
Traveling
Country: UK
Location: Alderholt
Occupation: Aerospace
Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar
Join Date: Sep 2004
Location: Alderholt
Posts: 4,225
|
Worked with some guys from USAF F-86, F-105 (Piloted cruise missle) as well as the usual gaggle of F-4's mostly. Great stories 
"Deadbug"..................................
__________________
It is impossible to lick your elbow.
Team25Racing.com 
At least 75% of people who read this will try to lick their elbow!
|
|
|
|
|
13-01-2007, 03:00 PM
|
#45
|
|
Registered User
Join Date: Jan 2007
Posts: 35
|
Yea...we had some "Lead-Sleds" too. USAF gave me the name $hooter...it was my call sign.
|
|
|
|
|
13-01-2007, 06:47 PM
|
#47
|
|
Registered User
Join Date: Mar 2004
Posts: 6,891
|
http://www.berkeleypoint.com/learning/titanium.html
Quote:
|
In 1950-1960s the Soviet Union attempted to corner the world titanium market as a tactic in the Cold War to prevent the American military from utilizing it. In spite of these efforts, the U.S. obtained large quantities of titanium when a European company set up a front for the U.S. foreign intelligence agencies to purchase it. Indeed, titanium for the highly successful U.S. SR-71 reconnaissance aircraft was acquired from the Soviet Union at the height of the Cold War.
|
|
|
|
|
|
14-01-2007, 10:09 AM
|
#48
|
|
Registered User
Join Date: Mar 2004
Posts: 1,016
|
Quote:
Originally Posted by Johnny Boat Dude
In my opinion ......
|
Bolts ? What do y'all know about bolts?..... 
.
.
.
.
.
.
.
.
.
.
.
.
.
__________________
“Never try to wrestle a pig” ™ The Sparkler Prefect
|
|
|
|
|
14-01-2007, 10:23 AM
|
#49
|
|
hello
Join Date: Mar 2004
Posts: 2,739
|
Thats why I said "in my opinion" rather than just stating facts that may or may not be right!!! 
|
|
|
|
|
14-01-2007, 12:45 PM
|
#50
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Quote:
Originally Posted by Jono
Bolts ? What do y'all know about bolts?.....
.
.
.
.
.
.
.
.
.
.
.
.
. |
 You're like a feckin Pitbull! 
You wanna watch it, your species have been banned in these parts.
 
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
14-01-2007, 08:24 PM
|
#51
|
|
Registered User
Country: uk
Location: Lincolnshire
Occupation: RAF
Interests: Anything Fast and Wet !!
Boat name: Thunderbirds
Boat make: Argo 21, Sourcerer
Engines: Merc 200hp, Merc 25hp
Join Date: Dec 2004
Location: Lincolnshire
Posts: 231
|
Well i'm looking for some tit' bolts as i have been in the situation in ocr when my new Yam 130 broke 2 bolts during a not so rough race and we nearly lost it so a few hundred squid is well worth the investment to save quite a few grand imho 
|
|
|
|
|
14-01-2007, 09:10 PM
|
#52
|
|
Registered User
Country: England
Location: Hertfordshire
Occupation: Airline Operations.
Interests: Rum. Pirates. And West Cornwall pasties.
Boat name: Any suggestions?
Boat make: Ring 18
Engines: Mercury 200 Black Max
Cruising area: The Bay of 'E'
Join Date: Sep 2005
Location: Hertfordshire
Posts: 369
|
Quote:
Originally Posted by Jono
Bolts ? What do y'all know about bolts?..... |
Tom Berenger as Sgt. Barnes in 'Platoon'!
Am I the only one who got that? 
__________________
Boat: (Noun) - A hole in the water, lined with fibreglass, into which you pour money.
|
|
|
|
|
14-01-2007, 09:20 PM
|
#53
|
|
hello
Join Date: Mar 2004
Posts: 2,739
|
Yep seems so. Oh well, I'm batting 500, nobody's perfect!!!
|
|
|
|
|
14-01-2007, 09:29 PM
|
#54
|
|
Registered User
Country: England
Location: Hertfordshire
Occupation: Airline Operations.
Interests: Rum. Pirates. And West Cornwall pasties.
Boat name: Any suggestions?
Boat make: Ring 18
Engines: Mercury 200 Black Max
Cruising area: The Bay of 'E'
Join Date: Sep 2005
Location: Hertfordshire
Posts: 369
|
What do you know about surfing Major? You're from Goddamn New Jersey!
With regard to these bolts though, surely they won't come loose if you're using Nyloc nuts? And only using them once, ie: not refitting them after they've been removed before?
__________________
Boat: (Noun) - A hole in the water, lined with fibreglass, into which you pour money.
|
|
|
|
|
14-01-2007, 09:39 PM
|
#55
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Quote:
Originally Posted by Johnny Boat Dude
Yep seems so. Oh well, I'm batting 500, nobody's perfect!!!
|
Canonball run, Burt Reynolds.
next line... Except.......'HIM'! (Victor Prince)
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
14-01-2007, 09:57 PM
|
#56
|
|
Registered User
Country: England
Location: Hertfordshire
Occupation: Airline Operations.
Interests: Rum. Pirates. And West Cornwall pasties.
Boat name: Any suggestions?
Boat make: Ring 18
Engines: Mercury 200 Black Max
Cruising area: The Bay of 'E'
Join Date: Sep 2005
Location: Hertfordshire
Posts: 369
|
That was a nice looking Scarab Burt Reynolds had in the beginning part of that film. Right up until he crashed it. 
__________________
Boat: (Noun) - A hole in the water, lined with fibreglass, into which you pour money.
|
|
|
|
|
14-01-2007, 10:04 PM
|
#57
|
|
Registered User
Join Date: Mar 2004
Posts: 1,016
|
Quote:
Originally Posted by Burnett
Tom Berenger as Sgt. Barnes in 'Platoon'!
Am I the only one who got that? |
Check out the big brain on Brad...
__________________
“Never try to wrestle a pig” ™ The Sparkler Prefect
|
|
|
|
|
14-01-2007, 10:19 PM
|
#58
|
|
hello
Join Date: Mar 2004
Posts: 2,739
|
Yeah yeah enough with the film quotes allready!!!
|
|
|
|
|
15-01-2007, 06:33 AM
|
#59
|
|
Traveling
Country: UK
Location: Alderholt
Occupation: Aerospace
Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar
Join Date: Sep 2004
Location: Alderholt
Posts: 4,225
|
Quote:
Originally Posted by Jono
Check out the big brain on Brad... |
Gotta Be Pulp Fiction ... Honey Bunny
__________________
It is impossible to lick your elbow.
Team25Racing.com
At least 75% of people who read this will try to lick their elbow!
|
|
|
|
|
15-01-2007, 10:56 AM
|
#60
|
|
Registered User
Country: England
Location: Plymouth
Boat make: Fletcher Arrowflyte
Engines: Mercury 75
Join Date: Nov 2004
Location: Plymouth
Posts: 402
|
Regarding tensile strength, I would imagine the standard SS fine thread bolts would be plenty strong enough for recreational use. I would have thought the failure point would be the brass nut rather than the bolt anyway.
I agree with JF that the fine thread is more for vibration resistance & 'tightenability' rather than absolute strength.
The 'land' on the bolt is important as it provides location & alignment but (if I remember correctly) it's less important here because the holes in the outboard are significantly bigger than the bolts. Bolts are locating & fastening devices (threaded only part way), screws are for fastening only (threaded all the way) but that's a whole other thread & there are lots of people who are going to have a different opinion on this.
|
|
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Linear Mode
