- Location
- under grace
Just a query? When leading the rope at the 90 degree angle are bend ratios accounted for? silly question im sure!
New Lowering device!
- Thread starter Reg
- Start date
- Location
- Retired in Minneapolis
When I've used redis at the end of rigging systems I account for the wraps to take the load. The redis, in my plans, will not take a larger load than I could take with wraps just on the bollard. Using a redi is a convenience not a friction point.
Reg's design, I'm sure, take excessive loads into account.
Reg's design, I'm sure, take excessive loads into account.
Reg
Branched out member
- Location
- Victoria, BC
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Just a query? When leading the rope at the 90 degree angle are bend ratios accounted for? silly question im sure!
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Tom has it right. With sufficient wraps around the bollard to start with, the rope angle exiting the shafts is largely insignificant by that stage.
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So does making that pile of lowered logs allow you to then drop the butt on them without sidewalk/street damage?
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You got it Cory
Just a query? When leading the rope at the 90 degree angle are bend ratios accounted for? silly question im sure!
[/ QUOTE ]
Tom has it right. With sufficient wraps around the bollard to start with, the rope angle exiting the shafts is largely insignificant by that stage.
[ QUOTE ]
So does making that pile of lowered logs allow you to then drop the butt on them without sidewalk/street damage?
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You got it Cory
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Reg
Branched out member
- Location
- Victoria, BC
- Location
- Retired in Minneapolis
After thinking about the double bollards a bit I can see that they will have some extra benefits like your crew found.
Using both and having the rope go around in an oval will reduce the amount of friction on just one bollard which will reduce the heat.
Half of each of the bollards will become radiators or heat sinks. During big wood or fast lowers it's nice to not have to worry about melting a rope if the lower needs to stop in mid-drop for some reason.
It seems like the friction will be able to be dialed in really fine in half steps by using the two bollards.
Using both and having the rope go around in an oval will reduce the amount of friction on just one bollard which will reduce the heat.
Half of each of the bollards will become radiators or heat sinks. During big wood or fast lowers it's nice to not have to worry about melting a rope if the lower needs to stop in mid-drop for some reason.
It seems like the friction will be able to be dialed in really fine in half steps by using the two bollards.
Reg,
i have come to expect that a good arborist is a thinking and practical man.
many a conversation ive had with said arbos brings up certain products they think will benefit themselves and the industry that they would like to design and produce.i am yet to see any thing come to fruition.you on the other hand,what can i say, welldone!nice bit of gear!
the other day removed a blue gum that was totally leaning over a house with no high points that would benefit removal even with tag lines,just nothing.there was another tree a fair bit taller not to far away with good high points and over a good lowering zone.rigged that tree up then at ground level diverted lowering rope to grcs mounted on tree that was being removed.
as the rigging was in a tree that was to be retained and it was smooth barked(another blue gum)it couldnt be smacked up so all hangs had to be controled as far as swing.easy,we put on the hobbs next to the grcs on the same trunk.this got me thinking about your bit of gear and how handy it is.
would like to see your product with optional dual winches as we seemed to be tensioning both lowering rope and retention rope, but saying that youve still designed a handy bit of gear.
i have come to expect that a good arborist is a thinking and practical man.
many a conversation ive had with said arbos brings up certain products they think will benefit themselves and the industry that they would like to design and produce.i am yet to see any thing come to fruition.you on the other hand,what can i say, welldone!nice bit of gear!
the other day removed a blue gum that was totally leaning over a house with no high points that would benefit removal even with tag lines,just nothing.there was another tree a fair bit taller not to far away with good high points and over a good lowering zone.rigged that tree up then at ground level diverted lowering rope to grcs mounted on tree that was being removed.
as the rigging was in a tree that was to be retained and it was smooth barked(another blue gum)it couldnt be smacked up so all hangs had to be controled as far as swing.easy,we put on the hobbs next to the grcs on the same trunk.this got me thinking about your bit of gear and how handy it is.
would like to see your product with optional dual winches as we seemed to be tensioning both lowering rope and retention rope, but saying that youve still designed a handy bit of gear.
Reg
Branched out member
- Location
- Victoria, BC
[ QUOTE ]
Reg,
i have come to expect that a good arborist is a thinking and practical man.
many a conversation ive had with said arbos brings up certain products they think will benefit themselves and the industry that they would like to design and produce.i am yet to see any thing come to fruition.you on the other hand,what can i say, welldone!nice bit of gear!
[/ QUOTE ] Having a little workshop makes all the difference Chopper. I have also heard of many a better idea that never evolved because a person just didn't have the means to experiment with designs. Risking their own $$$, securing Intellectual Property Rights as well as liability issues are also major hang-ups.
There are always going to be dilemma’s, however much potential you think an idea might have.
I am fortunate in this instance that I have the support of a reputable company.
[ QUOTE ]
would like to see your product with optional dual winches as we seemed to be tensioning both lowering rope and retention rope,
[/ QUOTE ]
You can safely tension both bollards at 2:1 and 5:1. Thanks
Reg,
i have come to expect that a good arborist is a thinking and practical man.
many a conversation ive had with said arbos brings up certain products they think will benefit themselves and the industry that they would like to design and produce.i am yet to see any thing come to fruition.you on the other hand,what can i say, welldone!nice bit of gear!
[/ QUOTE ] Having a little workshop makes all the difference Chopper. I have also heard of many a better idea that never evolved because a person just didn't have the means to experiment with designs. Risking their own $$$, securing Intellectual Property Rights as well as liability issues are also major hang-ups.
There are always going to be dilemma’s, however much potential you think an idea might have.
I am fortunate in this instance that I have the support of a reputable company.
[ QUOTE ]
would like to see your product with optional dual winches as we seemed to be tensioning both lowering rope and retention rope,
[/ QUOTE ]
You can safely tension both bollards at 2:1 and 5:1. Thanks
- Location
- Alabama
Reg, is there any chance of the "jaws" damaging the rope in any way, as they are compressing the rope when under tension?
Reg
Branched out member
- Location
- Victoria, BC
[ QUOTE ]
Reg, is there any chance of the "jaws" damaging the rope in any way, as they are compressing the rope when under tension?
[/ QUOTE ]
Certainly much less chance than any rope-grab used in climbing systems. The jaws have an adjustment screw so they only close just enough to hold the rope....but with or without, there has been no evident damage. Thanks
Reg, is there any chance of the "jaws" damaging the rope in any way, as they are compressing the rope when under tension?
[/ QUOTE ]
Certainly much less chance than any rope-grab used in climbing systems. The jaws have an adjustment screw so they only close just enough to hold the rope....but with or without, there has been no evident damage. Thanks
It might seem kinda far fetched but what if a device could be tensioned from a distance rather than under the tree. I know about using a pulley as a redirect but I am thinking using a remote. By using electrical power could you maybe be able to hoist more as well as being in a safe location?
Reg
Branched out member
- Location
- Victoria, BC
[ QUOTE ]
I guess I'm not getting the advantage. I'll wait for further details to emerge so as to get a better understanding of the concept and practical application. The pictures are just not doing it for me at this point.
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We're getting there Robert. Apart from a few minor tweaks what you see is basically the production model:
I guess I'm not getting the advantage. I'll wait for further details to emerge so as to get a better understanding of the concept and practical application. The pictures are just not doing it for me at this point.
[/ QUOTE ]
We're getting there Robert. Apart from a few minor tweaks what you see is basically the production model:
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Reg
Branched out member
- Location
- Victoria, BC
Reg
Branched out member
- Location
- Victoria, BC
Reg
Branched out member
- Location
- Victoria, BC
Reg
Branched out member
- Location
- Victoria, BC
- Location
- CT
this is a real interesting device, im looking forward to learning more about, really good idea Reg!
Reg
Branched out member
- Location
- Victoria, BC
Reg
Branched out member
- Location
- Victoria, BC
We also have a Single Fixed Bollard and a smaller Hanging one (not shown here) to complete a range. All 3 will be on show at the Arborist Trade Fair http://www.trees.org.uk/trade_fair.php next month at Fletcher Stewart's stall.
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