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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'
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


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


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


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.


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.



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!


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

14/11/2018 13:27:52

Without going in to the long convoluted reasons our local mooring holders have a problem laying their mooring sinkers.

We have to place 40 concrete weights weighing up to 3 tonnes in the River Blackwater. To do this we are going to place the weight ( complete with the chain & buoy attached) at the low water mark. We will attach a flotation bag to the weight & as the tide rises (5 metres) it will lift the weight off the sea bed.

We will then tow the weight to its position using a work boat & drop the sinker with chain etc thus placing a mooring.

The bottom of the flotation bag will be approx 1.5 metres below the water level and we have to release it from the sinker.This means we have to make a quick release hook. The hook must not come undone accidentally as it is waiting for the tide coming in due to wave motion & it must never come undone in the wrong place as we cannot move an incorrectly placed mooring which would be a disaster

So what I want to know -- can anyone come up with an idea for a simple release hook that can be operated from a workboat at water level safely under 3 tonnes of load. We have to be able to make it ourselves. I have milling & welding capabilities etc I want to be able to make it as economically as pos & it to be fairly basic idiot proof.

Please do not suggest other mooring methods- there are countless reasons why we have to do this. 50 mooring owners have applied their minds to this & this is the direction we must go

I am hoping someone may have seen something in a factory somewhere that we can adapt. Or, being engineers, they may have an idea


Edited By Sam Longley 1 on 14/11/2018 13:29:43

Thread: Solution found to the World's biggest problem . . .
12/11/2018 22:41:12
Posted by RRMBK on 09/11/2018 12:28:52:

I recently visited the Triumph factory at Hinkley, great day out and very interesting . Very tempted by a new bike but will it still be going in 40 years time i'm not sure? will I be able to get spares , I suspect not, can I service and repair it myself absolutely not !!

Exactly the same applies to my 26 year old Peugot based motorhome in comparison with a new one,

But will you be in a fit state to repair it in 40 years time? & even if you are, you will, i am sure, have lost the will to repair it anyway. Why not buy a new one & enjoy it? If you drop dead next week then you will be able to say that at least you had a new bike for a week. People seem to say it is wrong to change, but is it?

Life is not all about possessions but it is about "comfort" & "quality" of living. Sure if you enjoy repairing old items ( & let's face it there is a satisfaction in doing so) then do it.Can you blame people for not wanting to have all the bells & whistles & the latest gadget or the latest bike, or the most modern machinery that actually has decent controls plus a few "extras" that you had not thought of before.

Thread: Boiler certification in a launch
09/11/2018 20:50:05
Posted by Paul Kemp on 09/11/2018 20:09:02:

Posted by Ron Laden on 09/11/2018 16:52:03:

I know very little about steam engines and boilers etc but how anyone can operate one at any scale with an untested boiler is beyond me. I would keep looking at the boiler thinking "is it safe" maybe its just me.

Edited By Ron Laden on 09/11/2018 17:07:15


Anyone operating a boiler ought to be capable of making an informed judgement if the boiler is in acceptable condition - if that is not the case then I respectfully suggest they stay well away from one! The real danger from boilers is a lack of understanding by the operator.

I regularly volunteer on a heritage railway and before anyone is allowed to light a loco up, let alone fire one they have to learn and demonstrate competence in the principles of operation and safety and carry out their own visual examination of the boiler for any signs of water leakage externally or within the firebox including stays and fusible plug(s) and the smokebox tube plate / tubes which is a daily check, to an assessor. Once in steam and before going off shed the safety valve should be observed to be operating correctly according to the pressure gauge and methods of water feed proved functional as well as a proper test of the gauge glass(s) or try cocks. Granted that is not a full trousers down inspection of the whole boiler but roughly once a month at wash out all fittings are inspected as well as an internal exam and integrity of stays checked, among other things. This is in addition to the annual formal boiler test by an independent inspector.

Things worth considering are; boilers rarely fail catastrophically without some prior indication like steam and water leaks - hence the importance of the operator having a full understanding of the implications of warning signs. A boiler inspection is a bit like an MOT, happens once a year and a lot of damage can be done to a boiler in a year by the operator running with low water, rushing into steam (unequal expansion damage), failure to wash out or in hard water areas descale so hot spots develop stressing the plates, etc etc etc!

The real risk of a miniature boiler exploding is small unless it has been made from a baked bean tin held together with chewing gum by someone with no knowledge or appreciation of the potential issues - in which case return to paragraph one! The relative level of risk is further evidenced by the low cost of insurance, if boilers were exploding left right and centre the premiums would be massive. Even the black museum of sectioned boilers parts showing quite serious weld defects and constructional issues which used to appear on various stands at exhibitions in a perverse way show the level of risk as they came from boilers that had been operated for years with those defects present before they were cut up and none of them failed catastrophically as far as I am aware?

As far as the OP question goes there is not enough information on the proposed boiler itself to make any reasonable assesment of risk - is/ was it being made to an established design? What are the materials? Builder competence? The question focused on a lack of intent to follow a formal independent inspection and certification regime because of a belief it wasn't required - that doesn't necessarily on its own make the boiler dangerous. It may be the owner is perfectly capable of making his own assesment and is confident in his abilities. It is interesting perhaps and seemingly little understood that it is the owner / operators responsibility under the regulations to appoint a competent person and be confident of his competence in so doing, to inspect a pressure system. It remains the owners liability for the safe operation unless it can be proved the person issuing the certification was negligent the owner / operator will carry the can. Having boiler certification means nothing 11 months after the test if the boiler has not been operated and monitored correctly by the operator.


Please accept that I agree with you entirely & with some of the comments within this thread. I just am surprised that no one can come up with a statutory instrument to stop people having what would be quite a large boiler without having any sort of test during its lifetime

I suppose it is a bit like all the cheap air compressors that are sold to the public. I expect that once sold none are ever tested, but many sit in sheds collecting water in the tanks, never drained, & rusting gently away.

Still as one never hears of one exploding I suppose it is a non event, thus not requiring attention from the authorities

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