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Member postings for Sam Longley 1

Here is a list of all the postings Sam Longley 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Gatwick Drone 'Attack'
09/01/2019 16:13:59
Posted by mechman48 on 09/01/2019 10:58:23:

Simple answer would be … whoever buys a drone has to register it with the CAA with it's serial #, model #, name & address of the owner. These drones are usually operable within a 1or 2 kilometres of the control system ( apart from industrial / film / TV production models ) so should one be 'captured' then the authorities only have to look within that radius to locate the owner …?. Just my two pence worth.

George.

Most of the members in my club make their own from scratch, as do people I know who are not members of clubs.The parts are readily obtainable from such a wide source (& for a range of uses other than drones) that they are virtually untraceable

As an aside, I watched the programme a few months ago about the Battle of Britain where they had models flying in combat. I seem to recall that some had lasers & successfully "shot down" the opposition. If these lasers are successful at disabling the electronics; then I am sure that I could soon be skillful enough to down a drone, from another drone, with a laser, once I saw one & could chase after it. That must be a cheap way of doing it, provided one could get near enough in time- That being the problem.

Thread: Access Platform
31/12/2018 12:39:48

Make a couple of 4 ft square towers of the required height but make them so one will fit on top of the other for double height so you have a tower . ( you could just buy a small tower & use it in 2 halves - they are fairly light & easy to store away) then get a 10,12, or15ft Youngmans with a handrail fitted one side.Plonk the Youngmans on the 2 towers & you have a nice long stable platform.which is safe & easy to move around You can get a 12 aluminium staging( Youngmans) for around £100 & stick your own uprights on one side with a handrail so you do not step back to admire your work & break your neck

 

Edited By Sam Longley 1 on 31/12/2018 12:44:54

Thread: Gatwick Drone 'Attack'
24/12/2018 17:10:36
Posted by Michael Gilligan on 24/12/2018 15:56:29:
Posted by Sam Longley 1 on 24/12/2018 15:48:29:

I just think it seem weird that with all the technology they cannot jam the 2.4 channel for just enough seconds to crash the drone. I know that modern transmitters (like my Futaba) change frequencies within the bandwidth quickly but surely they can beat that. Or is it a case that doing so may disrupt some other important systems operating on the same frequency?

.

I think it more likely that by simply crashing the drone they would lose any chance of apprehending the perpetrators.

MichaelG.

Fair comment Michael, but it seems to me that they have not caught the perpetrators any way. Plus they have caused misery to thousands. Surely upsetting the signal would have saved massive costs as well.

The comment has been made that if a drone looses its signal it will fly back to a pre determined position. Yes they do that in our club. It is one of the tricks we perform, Have a cup of coffee whilst the drone does circuits, then as it runs out of power it senses it & comes home & hovers 4 ft above the ground waiting to be collected. So thinking that through, a helicopter sights the drone. Signal gets jammed & the drone says hey I am going back to base -- & guess what -- there is an operator standing there for all to see.

Surely that is not beyond the ability of someone with a bit of techy experience.

As for a few car alarms going off - well - what is worse? Put yourself in the position of a traveler & one of a car owner. Who is inconvenienced the most?

 

 

Edited By Sam Longley 1 on 24/12/2018 17:21:44

24/12/2018 15:48:29

I just think it seem weird that with all the technology they cannot jam the 2.4 channel for just enough seconds to crash the drone. I know that modern transmitters (like my Futaba) change frequencies within the bandwidth quickly but surely they can beat that. Or is it a case that doing so may disrupt some other important systems operating on the same frequency?

What really concerns me is the backlash on sensible model fliers

our club operates a quarter of a mile from a private field (Stowe Maries war museum) where there can be a couple of air displays a year & regular private flights (biplanes etc) during the week. Although the airfield operators have agreed that the planes will not fly over our model flying site they sometimes do ( probably visitors) . If we cannot get our models down in time they can get close. That being said we always look out for them & if a plane strays close we down all models until safe to fly.

If someone suddenly decided that a practice that has worked Ok for the last 8 years is no longer safe then we would loose our flying field (for which we have local authority planning permission)

This drone incident is something that bone fide modelers can do without

24/12/2018 15:36:12
Posted by JasonB on 24/12/2018 14:00:21:
Posted by Phil Stevenson on 24/12/2018 09:59:41:

..........................without comment from the mods (no sex, yet). Does that mean I can start to talk about the success or otherwise of terrorism again?

I have deleted a few posts without comment and will continue to do so.

Do not mention the sex

I did but I think i got away with it yes

24/12/2018 11:11:26

I think the correct response to that post might be " Don't judge others by yourself!!"

Edited By Sam Longley 1 on 24/12/2018 11:11:36

24/12/2018 10:02:29
Posted by Phil Stevenson on 24/12/2018 09:59:41:

Having had my knuckles rapped earlier in this post for veering towards politics (a fair cop), things seem to have veered well away from the tech of drones to delve back into politics and even religion without comment from the mods (no sex, yet). Does that mean I can start to talk about the success or otherwise of terrorism again?

Naah !!

Stick to the sex angle it is more fun than droning on about politicsdevil

Edited By Sam Longley 1 on 24/12/2018 10:04:09

24/12/2018 09:35:27
Posted by Clive India on 24/12/2018 09:22:40:
Posted by c wastell on 24/12/2018 08:24:30:
Posted by Sam Longley 1 on 23/12/2018 20:41:28:
This is how they do it in America **LINK**
Starts at about 1.5 mins

I'm no pacifist but that is a screwed up societysad

And they are not very good at shooting down model planes either. Why bother to make them move - they could probably not hit the target if it was attached to a pole! Your models are safe methinks.

My wife was watching the programme about one of our warships & I noticed a bit where one of the gunners was aiming at a target at sea. To be fair to the amateur Americans they were probably no worse than our"professionals"

Later in the programme the female captain congratulated the gunner on his shooting, but from the little I saw only a couple of bullets actually hit the target, with most shots scattered around it. I could not help wondering how the gunner would have faired if the target had been a in Israeli soldier with a similar machine gun returning fire. I doubt if our man would have got off more than a couple of rounds.

At least the Americans did eventually hit all the model planes. Mind you a shotgun might have been a better weapon than some of the artillery pieces. Fun firing one though!!. Bit worrying knowing that the druggy neighbour up the road might have one in the garage.

23/12/2018 20:41:28

This is how they do it in America

**LINK**

Starts at about 1.5 mins

Edited By Sam Longley 1 on 23/12/2018 20:42:57

23/12/2018 20:34:59
Posted by Danny M2Z on 23/12/2018 07:40:33:

About 1 in 800 rounds hit the a/c and when one did it usually caused little damage. A drone would be more susceptible to a hit though.

There is a local clay pigeon shoot that shares our model flying field every second Sunday, I am pretty sure that their hit rate is somewhat better than 1 in 800 & the stray "bullets" would not go far.

I suggest that, if invited, they would feel quite happy to line the perimeter for a few hours to pop a stray drone; especially if someone gave them a reasonable share of the £50K reward money offered for the perpetrators of the crime.

Thread: Making a torch
18/12/2018 14:28:01

I am going to use the aluminium rudder stock from my boat. I lost my rudder when I ran aground near the Kessock bridge in the Morray Firth when sailing SH round UK. I saved the old stock which had been in the boat for 12 years without corrosion & is tapered 35-80 diam & is 2.4 m long.

It is obviously a structural grade but I have not tried machining any of it yet . I just wanted a project that was different & being able to carry about, use & say Yeah! "I made this" You cannot do that with models

So I had not got to considering what grade, only using what I had . But now I am in a quandry. I may experiment with some offcuts & see how it machines first. I am not worried about corrosion, The boat does not get that wet & i can always put the torch in my pocket. Will not make it too big ( first time round anyway)

Edited By Sam Longley 1 on 18/12/2018 14:29:52

18/12/2018 10:42:21

The Aeries self steering is alumnium & is 40 years old. It is anodised. The torch will not get wet so I am not worried about it being aluminium. thanks.

But, that being said, what would you suggest as an alternative that is easy to machine , turn, thread & mill flats on etc?

18/12/2018 10:19:42

As I said in my original post--we can all buy biros for pennies - But??

Machining the aluminium, cutting the threads, - nice fine ones so it feels like quality-anodising the case, making the clip & decent knurling. Battery fixings could be fiddly & a job for a printer.

I am sure that i could work out something for a reflector or LED mounting & perhaps use a small magnifying glass lense for the glass. Would that work? Focal length & all that.

Not sure about the electronics & that is where I was hoping to get some comment. Switch could be a screwed base.

It was only a thought for a project different to the run of the mill steam engines etc etc

 

Edited By Sam Longley 1 on 18/12/2018 10:22:53

17/12/2018 22:24:43

Yeah!!! I know that one can buy them dead cheap (Or pay a fortune) but you can also buy a biro for pennies & people still make pens!!

So has anyone tried making a torch. Perhaps a nice aluminium  rechargeable one? Coloured, anodised barrel perhaps. LED's or Zenon ( what should one use?) Are there any designs out there to follow?

I want a nice handy powerful round rechargeable one for the boat that will not go flat in five minutes & be there when I need it & not just glimmer at me & die.

Edited By Sam Longley 1 on 17/12/2018 22:25:50

Thread: Interests other than Model Engineering
03/12/2018 22:32:28

Model Aeroplane flying. Good fun as I am in a great club, with some really helpful guys. If one has a problem there is always 4 heads in the plane making suggestions. They do not always know the answer, but all willing to try & help!!!

But mainly sailing (single handed). Been round UK twice single handed. Last year I was presented with some goodies by the Royal North Sea Yacht Club in Belgium to commemorate my 75 Th visit to Ostend. First visit was in 1970. I have cruised from Amsterdam & almost as far as La Rochelle & go to the Channel Islands most years

I also sail a single handed racing dinghy when not on my yacht. Yesterday I was on the club support boat rescuing capsized dinghies as for the last 15 years I have crewed the RIB for the winter series.( gets a bit cold so I have stopped racing it in the winter, just doing support boat ie laying marks etc & pulling others out of the oggin now)

I have had a lathe for over 50 years (originally a Drummond type M, plus a Colchester Master & now a Warco 250MV) & had a Myford wood turning lathe that my father bought for me when I was 12/13 years old.

Edited By Sam Longley 1 on 03/12/2018 22:41:28

Thread: Quick release hook
16/11/2018 09:07:17
Posted by Bazyle on 15/11/2018 23:25:42:

It is really quite simple and I saw something suitable in use on a farm for holding open a hatch albeit at a lower load. Just scale to fit.
It was a chain ending in a foot long bar. The bar was passed through a staple in the hatch and doubled back to lie alongside the chain (vertically up). A foot of scaffold pipe slid down the chain over the bar so it couldn't move and the weight of the pipe kept it in place. A rope over a pulley would pull the pipe up releasing the bar which flipped down to release the hatch. The length of the bar meant there was little force so little friction to prevent the tube moving up. It could be released from the other end of the barn but was 100% secure so couldn't accidentally drop the door on an animal.

So basically a pelican hook but a much cruder construction. That has me thinking

Thanks

14/11/2018 22:51:54
Posted by Brian Sweeting on 14/11/2018 22:48:13:

Plastimo do a 9000kg, swl5200kg, snap shackle, is this your idea?

Link here

**LINK**

Edited By Brian Sweeting on 14/11/2018 22:48:42

Thanks I did not realise that pattern went that large . Wichard are notoriously expensive but I will find out the cost

14/11/2018 22:48:23
Posted by Pete Rimmer on 14/11/2018 22:16:29:
Diving is a no-no simply because of visibility. Lots of divers have told us so, otherwise we would just reconnect new chains to the existing sinkers on the seabed without raising them. (we are not using bags to raise them)

Find better divers. I had guys working at 24 metres down rigging up a concrete cutting setup in zero viz by touch alone. If I told them that it was impossible to attach a chain in zero viz they would fall over backwards laughing.

**LINK**

Edited By Pete Rimmer on 14/11/2018 22:17:28

Edited By Pete Rimmer on 14/11/2018 22:18:46

How much do you pay these divers along with all the attendant support gear?

When you tell me, I will laugh as well.

This is all about economics. A tug to lay the moorings wants several £k's poss £6-8K to be confirmed

A local friendly tug guy used to do them for £ 50-00 each as he was passing, minimum 10 at a time. Just because he was friends with us all. Unfortunately he passed away & his family will no longer hire the tug to us

A Flotation bag costs £1000 & will last several years .We can do the job ourselves using our own group launch at times to suit us. Ie not all in one day. So when someone wants a single mooring we can put 1 in & not pay the minimum fee.So for 40 moorings we would charge £ 40-00 each, we would make a small profit for our fund & have a free flotation bag ready for next time

But all we need is to design a quick release hook

14/11/2018 22:16:28
Posted by SillyOldDuffer on 14/11/2018 21:44:45:

Aren't quick release hooks a standard maritime item? You can get small ones on Amazon up to giant ones for un-mooring ships. Perhaps a Ship Chandler would have what you want. The working principle of this Amazon example is fairly obvious if you wanted to make one.

Re Martin's point about the floatation bag rocketing to the surface on release, I don't think there's much difference between raising and lowering. To lift a 3 ton concrete block you would need about 1.35 tons of buoyancy. To lower the same block, slightly less. Say the bag is about 10 feet deep. The amount of energy released when the bag rises through water is the same order as a 1.35 ton weight dropped from a height of 10 feet. Easy enough to get a feel for the forces involved with a football and an oil drum full of water.

I think the method of moving the blocks is basically sound, but it would be dangerous to operate the quick release before the buoyancy of the bag was much reduced by releasing most of the air. On something like this I'd do a risk assessment and plan suitable mitigations. I suspect professionals wouldn't mess with bags for this - they'd use a barge fitted with a 5 ton crane to lower the blocks straight into the water, making it a standard lifting job.

Dave

 

You need 1.7 tons ( imperial) but there are other bits like weight of the mooring chain & the bag etc plus the effect of being towed through the water so the bag will probably be between 4 -5 ton capacity which( I think) is less that a 6 ft cube. there is a difference between raising and lowering as to raise one needs to pull the bag under the water to force the weight upwards. This needs attendant gear to do it. To lower it one hooks it tight to the weight & waits for the tide to come in & lift it, so there are no extra strops etc other than those on the bag. The bag will only sink about 3 feet so will not actually "shoot up" as suggested

If one released some of the air (assuming one could do a controlled release) the bag would sink & if for some reason the hook did not release then we could not return it to shore to sort the problem because the weight would drag on the seabed, leaving a dangerous object partially sunk in the water. Believe me, we have thought those situations through.

We just need a good simple quick release hook operable from the surface

The hook you kindly suggest is difficult to release under load very successfully & has to be pulled from the correct direction. Believe me I have released a few off a rolling yacht at sea with a billowing spinnaker trying to throw me overboard. Ships hooks tend to be designed for horizontal use as in warps and anchor chains through the hawse pipes so the designs do not really work for us.

Edited By Sam Longley 1 on 14/11/2018 22:17:54

14/11/2018 17:46:14
Posted by Martin King 2 on 14/11/2018 17:35:28:

Cannot remember the figures but concrete as a mooring weight medium is less than ideal, weighs so much less in water, you may need to take that into your calculations?

Mooring systems these days tend towards hydraulically driven galvanised screws, driven in vertically with extra sections bolted on until they ground out. Ones I ihelped install in the BVI years ago have just withstood Hurricane Maria with sustained 150 knots for 14 hours. 60 foot boats all survived except 2 where the cleats ripped out of the hulls!

Martin

Sorry- do not wish to be blunt but I want to avoid thread drift- I said in my first post that we are NOT interested in alternatives. We know all about specific gravity, screws, anchors, concrete (145lbs / ft3) marinas etc & have been using sinkers as best option for 30 years. We still believe that there is no economic, viable alternative having fully investigated them over the years. Even to the point of engaging outside marine consultants.(waste of time of course!!) Diving is a no-no simply because of visibility. Lots of divers have told us so, otherwise we would just reconnect new chains to the existing sinkers on the seabed without raising them. (we are not using bags to raise them)

I will take your first post ( & i thank you for that ) & go back to the air bag supplier who suggested it & has offered a bag for trial prior to purchase. However, there will only be a linking hook between sinker & bag so the situation is not quite as you suggest. We are dropping, not raising which is different.

 

Edited By Sam Longley 1 on 14/11/2018 18:18:05

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