Velcro

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coveman

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Hi
I am about to fit a Garmin 65cv echomap plus chartplotter to the boat. I have decided to attach a bracket to the inside of the cabin on the starboard side just inside the hatch, to the GRP. The idea being that I could then have a bracket that would swing out so that I can see it from the cockpit but it would also swing inside when not in use or could be viewed inside the cabin. I hate screwing anything to the boat or glueing for that matter, and was considering a wide piece of Velcro tape to secure the bracket. The weight of the unit is 0.7kg and a strip of Velcro is rated to take 7kg max load for a 100mmx50mm strip so it would appear adequate.
I have also heard there is a product called Dual lock by 3M that is also a good alternative.

Any thoughts good or bad????
 
Last edited:
coveman said:
Hi
I am about to fit a Garmin 65cv echomap plus chartplotter to the boat. I have decided to attach a bracket to the inside of the cabin on the starboard side just inside the hatch, to the GRP. The idea being that I could then have a bracket that would swing out so that I can see it from the cockpit but it would also swing inside when not in use or could be viewed inside the cabin. I hate screwing anything to the boat or glueing for that matter, and was considering a wide piece of Velcro tape to secure the bracket. The weight of the unit is 0.7kg and a strip of Velcro is rated to take 7kg max load for a 100mmx50mm strip so it would appear adequate.
I have also heard there is a product called Dual lock by 3M that is also a good alternative.

Any thoughts good or bad????
Click to expand...

Dual lock is stronger than Velcro, there are two types, one is heavier duty, i'd use that one. Not usually a need to abrade good gelcoat, just clean with acetone.
 
I have a swing out instrument panel like that, it works well.

An idea is to have a transparent rain / sprayproof cover for poor conditions with the hatch open, I have a sheet of flexible clear plastic which rolls up on the sliding hatch normally.

In my case the instruments ( plotter, radar, second fishfinder, hand bearing compass, handheld VHF ) are in screwed or bolted mounts but I don't see why this double lock stuff shouldn't work; the units may sag a bit though.
 
Last edited:
PCUK said:
but you will have to glue the Velcro on with the self adhesive backing!
Once you havehj abraded the surface to ensure a firm bond you will have gained nothing
Click to expand...
No one seems to have addressed this rather obvious point. I used Dual-lock to secure a solar panel to acetone treated gelcoat and it certainly works well. As does the backing glue which was a nightmare to remove.
 
Yes, I've used Dual Lock for things like that. that main up-side is that unlike standard Velcro, it does not creep off, it actually clicks into place. And yes, the adhesive is rather tenasious when it comes to removal... but it isn't masking tape, is it?
 
coveman said:
Hi
I am about to fit a Garmin 65cv echomap plus chartplotter to the boat. I have decided to attach a bracket to the inside of the cabin on the starboard side just inside the hatch, to the GRP. The idea being that I could then have a bracket that would swing out so that I can see it from the cockpit but it would also swing inside when not in use or could be viewed inside the cabin. I hate screwing anything to the boat or glueing for that matter, and was considering a wide piece of Velcro tape to secure the bracket. The weight of the unit is 0.7kg and a strip of Velcro is rated to take 7kg max load for a 100mmx50mm strip so it would appear adequate.
I have also heard there is a product called Dual lock by 3M that is also a good alternative.

Any thoughts good or bad????
Click to expand...

I recommend these https://www.wickes.co.uk/Command-La...WrTjvb7OkQ9EKmGYjArosXP0a6ZDN5KsaAm9FEALw_wcB as they are very strong and have a tag you pull that un-sticks them easily without leaving anything behind.

Www.solocoastalsailing.co.uk
 
Many thanks for all the useful replies - 3M seems to be the way to go - and if the type recommended by "Plum" are strong and removable they would be ideal - maybe I'll trial both the picture stickers and the dual lock type. Either way it avoids drilling holes and permanent adhesive such as Sikaflex which have their place, but not in my opinion for this job.
 
I wouldn't dream of using Velcro or similar for an application like this. Proper nuts and bolts are the correct and secure method. Holes can easily be filled if you need to.
 
ghostlymoron said:
I wouldn't dream of using Velcro or similar for an application like this. Proper nuts and bolts are the correct and secure method. Holes can easily be filled if you need to.
Click to expand...

You need to dream of better velcro ;)

Stuff I was given is used, amongst many applications, to secure modules inside million dollar gyro stabilised cameras on helicopters. Crazy strong and will never have a nut rattle loose :cool:
 
GHA said:
You need to dream of better velcro ;)

Stuff I was given is used, amongst many applications, to secure modules inside million dollar gyro stabilised cameras on helicopters. Crazy strong and will never have a nut rattle loose :cool:
Click to expand...

Indeed. I must have £1000 of electronic gizmos held by Dual Lock onto the vertical inside face of my gizmo locker. Some of these are quite heavy with cables hanging down underneath. Removing any of them requires a strong pull. Ordinary Velcro would not last 10 minutes. :(

Richard
 
Never mind a 0.7kg plotter, dual lock is used on a lot of production boats to hold the roof panels, side panels and even the seating in place.
 
coveman said:
The weight of the unit is 0.7kg and a strip of Velcro is rated to take 7kg max load for a 100mmx50mm strip so it would appear adequate.
Click to expand...

For fear of becoming a forum pedant...

The Unit has a mass of 0.7kg and Vecro is rated to support a mass of 7kg load presumable on planet earth. So its rated to 70N. The unit weighs 7N.

All that probably sounds very pedantic. And it kind of is. But when your bout lurches of a bug wave what G force is applied? Not a consideration for velcro in your house but if it briefly pulled 10G (which is a lot!) would the unit then Weight 70N briefly and come un-velcro'd...


I suspect 2G or 3G is common. 4 or 5 on a big roller probably happens often enough. a 10G - you may have bigger issues... But if you have less adhesion area, or its not pressed on properly your factor of error will reduce.
 
ShinyShoe said:
For fear of becoming a forum pedant...

The Unit has a mass of 0.7kg and Vecro is rated to support a mass of 7kg load presumable on planet earth. So its rated to 70N. The unit weighs 7N.


All that probably sounds very pedantic. And it kind of is. But when your bout lurches of a bug wave what G force is applied? Not a consideration for velcro in your house but if it briefly pulled 10G (which is a lot!) would the unit then Weight 70N briefly and come un-velcro'd...


I suspect 2G or 3G is common. 4 or 5 on a big roller probably happens often enough. a 10G - you may have bigger issues... But if you have less adhesion area, or its not pressed on properly your factor of error will reduce.
Click to expand...

Intresting though process , but you do know a vertical fighter plane will pull around 9 G and the normal human can handle around 5 G
I think the G force of an object placed on a bulkhead has very little G force on it , a typical jet taking of you feel around 1.5 G
And F1 pulling around maximum 4.5 G
So if your Boat sails down a large wave pulling heavy G you will not care about your Velcro more your underpants :D
 
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