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Member postings for PatMc

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

Thread: Covid 19
22/03/2020 19:23:43
Posted by dave windymiller on 22/03/2020 14:19:57:

Re venice - i was puzzled why the the canals were suddenly clear. Its still an open sewer and the residents no doubt still have excesses of toilet rolls. Lack of churned up mud makes perfect sense!

Personally, im hacked off as my op for a knee replacement early April has gone back to god knows when. Keep calm and limp on. Still good time to clear the model projects out of the garage.

Dunno if the canal & lagoon really are still an open sewer but the lack of tourists will make a tremendous difference to the quantity of of waste to be "managed".
OTOH someone once said that no one swims in the Adriatic, they merely go through the motions. teeth 2

I've been waiting since last May for a date for cataract ops. I had planned to ring the NHS PALS to give them a nudge when this situation broke.

Thread: Insanity seems to be setting in
22/03/2020 16:22:51
Posted by Peter Miller on 22/03/2020 09:31:39:

Oh dear, It is starting to sound like old soldiers showing off their scars.

Anyone remember ASian flu??

Yep! my mother, father & 2 of my 3 brothers all went down with it. Left me, at 17, in charge of the household with my 8 year old brother to help.
He was useless at launching C/L models. teeth 2

I caught it when the others had recovered, but nowhere near as severely.

Edited By PatMc on 22/03/2020 16:24:56

22/03/2020 16:16:55
Posted by leccyflyer on 22/03/2020 09:19:49:

People need to get real and simply stay where they are. This is a global emergency - the closest parallel would be the 1918 Spanish Flu pandemic, though we should be better equipped to deal with it. It really doesn't help to have people talking about their need to head out for their Easter holidays. It's a write off and they need to accept that. What are they going to do if they head to Cornwall for their holidays and the complete lockdown comes to pass? They will be stuck.

I think the 1956/7 Asian flu is probably a closer parallel.

Thread: Covid 19
22/03/2020 16:11:44
Posted by Scott Edwards 2 on 22/03/2020 14:25:28:
Posted by Martian on 22/03/2020 12:33:01:

I ask myself is the world resetting itself, there have been locusts earthquakes plaque flooding fires volcanic eruptions etc

Indeed ! These are the seven signs of the Apocalypse. Fire, flood, pestilence, plague, earthquakes .... the final and seventh sign is a child born without a soul ... Boris junior ?

You missed out number 6, famine? Perhaps that'll come when the perishable food, bought during the panic season, becomes inedible.
But pestilence & plague have the same meaning so we're back to 6. wink 2

22/03/2020 13:20:20
Posted by Denis Watkins on 22/03/2020 11:24:28:
Posted by Maurice Dyer on 22/03/2020 11:17:04:

Well, it's an ill wind as they say.should help with climate change / global warming or whatever it's called now

In Venice, the water is so clear that they can now see the fish in the lagoon

And major cities are experiencing the least air pollution recorded

According to the article on BBC site the water in Venice is actually of no better quality than before. The reason it's clearer is because with little or no traffic movement the normal sediment of the canal beds is not being churned up.

Thread: 35 MHz crystals
18/03/2020 21:30:52
Posted by Paul Ellis 4 on 18/03/2020 19:14:45:

I didn't realise that Transmitters had that option.

They haven't.

Thread: Insanity seems to be setting in
17/03/2020 21:17:05
Posted by Peter Miller on 17/03/2020 21:08:32:

I can't help wondering what would have happened if the population had a similar mindset in 1939.

Was there a pandemic in 1939, Peter ?

17/03/2020 20:48:52
Posted by Steve J on 17/03/2020 18:13:13:
Posted by Gary Manuel on 17/03/2020 17:18:26:

I don't get the logic of keeping the schools open either David. My guess is that they have judged that the disruption of closing them and having parents off work or grandparent looking after the kids outweighs the risk of cross infection via school.

Covid-19 is not a big risk to the under 20's so the argument for closing schools would be to protect teachers and parents.

If you close schools now, what is going to be the criteria for reopening them?

If schools were closed a large percentage of medical staff & care worker would be affected by having to either take leave to look after their kid(s) or make other arrangements.
Grandparents are probably the most common child minders, which means the kids, who are least affected by this virus, would be in close contact with the most vulnerable group.

17/03/2020 20:33:56
Posted by Erfolg on 17/03/2020 18:12:58:

Patmac, was he not the one who did not win the General Election?smiley

Not certain what you're saying here, Erf , given your strange choice of language.
If you mean "Didn't Boris Johnson win the last general election ?" then yes he did but that doesn't make him either "competent" or a "born leader".

17/03/2020 17:44:33
Posted by Solly on 17/03/2020 17:37:29:
Posted by PatMc on 17/03/2020 17:13:03:
Posted by Erfolg on 17/03/2020 16:29:04:

My last thanks to God, is thank goodness it was some one who is competent, who won our last General Election, a born manager.

You must be joking. smile o

Ah yes Pat. If only you were in charge everything would be peachy.

No, if only we had someone who was not an inveterate liar & who's personal ambition did not disregard the national interests.

17/03/2020 17:13:03
Posted by Erfolg on 17/03/2020 16:29:04:

My last thanks to God, is thank goodness it was some one who is competent, who won our last General Election, a born manager.

You must be joking. smile o

17/03/2020 11:08:51

Our local chemist shop has sold of paracetamol, ibuprofen etc last week.
And since it was announced that the over 70's should stay at home for up to 3 months they've run out of Viagra.

Thread: 2 or 3 questions please, need some wise advice
13/03/2020 16:14:06

Don't panic, it'll be OK tomorrow - Saturday the 14th!! wink 2

Sorry about that, I couldn't resist. embarrassed

Seriously, I agree with the previous posters who advise seeking help from a local club.

12/03/2020 19:30:35
Posted by 911hillclimber on 12/03/2020 18:50:36:

I had the left stick doing only throttle, and my plan was to have the right stick doing rudder and elevator

That's correct for mode2 thumbs up

As I said previously don't think of it as "rudder", think of it as primary direction control. Of course with RET it's the only direction control.

12/03/2020 17:42:56
Posted by 911hillclimber on 12/03/2020 17:13:40:

Left stick now gives rudder (left to right) and throttle (up and down) MODE 2.

Sorry but that's not Mode 2 for a R/E/T model.

Left stick should only control throttle, right stick rudder & elevator.

If you want Mode 2, simply plug the switch the rudder servo to channel 2.

12/03/2020 16:59:22
Posted by 911hillclimber on 12/03/2020 15:56:27:

It feels more natural to me to have throttle on the left stick with Alierons on the left stick , and Rudder/elevator on the right stick.

Not sure if this is "teaching granny to suck eggs" but - you shouldn't really consider the horizontal stick movements as being assigned to "ailerons" & "rudder" but rather to primary & secondary turn controls. Normally ailerons are the primary turn control but you will be using rudder as primary therefore simply plug rudder into channel 2 & you will have rudder/elevator on the right stick. When you have a model with ailerons fitted - ailerons in ch 2, rudder - in ch 4.

BTW I fly mostly aileron equipped models with the channels arranged as described but for my rudder/elevator/motor only models I mix about 50% "aileron" to the redundant "rudder" stick at the Tx. This means that the left stick is still effective for turn control just in case I inadvertently try to steer with the left stick during take off as I would with a 4 function model.

Thread: On board volt & amp meter
06/03/2020 21:37:12

Forget about checking the current, just fit the voltmeter leads to the outer pins of a 4 pin jst-xh socket then connect that with the battery balance lead when fitting the battery.
Check the voltage at rest then at WOT to see what the volts drop is under load.

OTOH use a tachometer to check what rpm you get at WOT between flights.

Thread: electric to oily motor conversion
05/03/2020 20:44:24

A 540 brushed motor will weigh around 160 - 180 gm against a Cox 049's weight of about 60 gm. If the original battery was situated around the cg a nose weight in the region of 100 - 120 gm isn't outlandish. However the power of a Cox 049 is nothing like a 540 on 8.4v. In both power and weight a Cox is about on a par with a brushed 400 motor (typicaly 70 gm) on 8.4v.
You don't say how much the model weighs or give it's size but on the basis of original power versus proposed power I think it unlikely to give a satisfactory performance. If you are intent on following Solly's prejudiced advice wink 2 then, IMO, an 09 glow or a perhaps a PAW 1cc diesel would be more practical choice.


For comparison, about 25 years ago I designed & built Henry, the power glider model in the photo, to be powered by Cox 049 Babe-Bee. It was 63" span, had a decent climb & glide performance, was capable of some loops & mild aerobatics. It was also flown as a pure glider quite a lot at my local slope site. A year or two into the Henry's life I converted it to electric using a 400 brushed motor with 7 x Sanyo AA 800 mAH cells similar to the ones used for Rx's at the time. Using the same 6x4 prop as used by the Cox or a 5" folder (as an the photo) power & performance matched that of the Cox despite the increase in weight of 3 extra cells.

Thread: Individual cell voltage of LiPo flight battery.
01/03/2020 22:00:11
Posted by Gordon Whitehead 1 on 01/03/2020 20:43:24:

Reading the references quickly, it looks to me as if the Unilog is a data logger intended for post-flight evaluation of the measurements. Unless it can report in real time and sound a warning when Peter's 3.3V threshold has been reached, it seems to me to be of doubtful utility unless you are a data collecting enthusiast. Does the Frsky system announce when an individual cell has breached a chosen lower limit?

There are 2 versions of up to 6 cell lipo voltage sensors. One version has an OLED display for on the ground quick check & can be run in series with a second if more than 6 cells are used, the other is a mini version with no OLED & not able to be used with a second - unit cost about £14 & £10. Like Steve, I think they would be of limited use in practice so have no direct experience of them but in common with other FrSky sensors I would definitely expect to be able to set an audible warning if any one cell had breached a chosen lower limit. It would also be possible to have an audible record of all cells in turn at the flick of a switch.

On some models with "legacy" pre-lipo ESCs I use a battery sensor that reads the full battery voltage when required & is also set to give a warning when a predetermined low voltage is reached. This version only costs about £3.

Thread: Modified or not Magnatilla.
01/03/2020 14:36:46
Posted by Cuban8 on 01/03/2020 13:51:35:
Posted by Rob Fairweather 1 on 29/02/2020 13:12:09:

Thankyou all for the comments.

is it ok to saw a couple of inches off the back end Cuban 8 ?

Nice one Jeff.

PPPPPP is a maxim I've always used Don.

i dont want to change the flying characteristics at all fly boy.

Peter, at 66 I'm not sure about that, I'd have trouble remembering what I'd done !

The long moment arm will accept a bit of a reduction, a conservative guessitmate I'd work on would be 50-75mm depending on what you want the model to look like. I doubt that that sort of reduction will lead to elevator problems.

Why would you want to reduce the fuselage length ?

It would make elevator control it less smooth but I wouldn't like to say by how much. IMO if it ain't broke don't fix it.

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