Shaun Walsh
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Posts posted by Shaun Walsh
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It should be possible, as the receiver doesn't care about mode 1 or 2 but the transmitter has to be configured so that the throttle and elevator controls are assigned to the correct stick after that the signals that are transmitted should be identical and interpreted the same way by the receiver.
Copied from flite test forum, standard channel assignments on AR620 are:
First slot on the left is Battery port. On older receivers, before they added the bind button, it was the "bind" port, and would be used for people flying with a battery pack instead of using a BEC or battery elimination circuit. From there, going to the right, It's TAERGA - Throttle on port 1, Aileron on port 2, Elevator on port 3, Rudder on port 4, Gear on port 5, AUX1 on port 6. All can be reprogrammed via the computerized programming on almost all of the Spectrum radios, though, so it's possible to have the Rudder on port 2, ailerons on port 5, etc...It's kind of a pain to reprogram, though, so I generally leave it.
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They're Bravermen than I am.
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15 minutes ago, Peter Christy said:
I'll download the bottom one before it gets removed.
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1 hour ago, Futura57 said:
Sad but true in my experience, more than once. In fact, more than twice. 😪 On one occasion they actually left a large parcel in my half full wheelie bin. Good job I lifted the lid the night I put the bins out, else it would have come and gone without me ever knowing.
Ordered a torque wrench from Amazon, next day delivery. After 3 days I complained and they sent me another one. Three weeks later a neighbour two doors down on the other side of the road gave me a very wet parcel. It had been thrown over his side gate and embedded itself in his hedge half way down the path. Thanks Yodel.
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1 hour ago, Geoff S said:
Yodel inform me that my package is due today (Friday 10th). I hope it's not just the LiPos. Unfortunately they haven't given me a delivery window so I can't (or won't) go out despite the sunny but cold morning. So I'll get on with making the sprung undercarriage for my Fokker DVIII.
If it's Yodel the only "delivery window" you will get will be the one they throw your parcel through, probably three doors down the road!
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5 minutes ago, Martin Harris - Moderator said:
In the last 10 or 15 years, I’ve encountered several batteries (family and friends’) which have failed internally. Typical symptoms are failure to crank the engine - jump start - ok for several weeks - repeat. One was taken to Halfords and pronounced fit for service…”you’ll need to take it to a main dealer (Lexus) to have a new alternator fitted - several hundred pounds”. Luckily I intervened and a replacement battery solved the issue.
I initially found this on my wife’s car which had had several breakdown call outs while I was unavailable at work. Each time the mechanic told her to get a new alternator. I had my suspicions and when it happened while I was at home, I had done voltage drop tests to eliminate terminal or earthing issues and when it just clunked one morning I confirmed the battery was fully charged by checking the electrolyte SG but with virtually no terminal voltage while attempting to start. A smart tap on the terminal post restored performance and it then started easily. Again, a new battery cured the recurring problem.
I assume construction of car batteries has changed over the years as I never came across this sort of behaviour last century.
My own car (MG5) uses what looks like a conventional sized car battery - do the ones with a record of failure use different technology or are they significantly smaller?
Many years ago the ability of the battery on my Mitsubishi Spacewagon to start the car depended upon how much you tightened the battery retaining strap. Tighten it too much and it wouldn't start. Compression of the battery appears to have broken an internal connection.
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5 minutes ago, Geoff S said:
I've had 2 petrol car batteries fail quickly and catastrophically without any warning at all. There were never any difficult starting issues as was once the case when cold morning slow turnover gave ample warning that a replacement is needed. Modern car batteries last longer but fail quickly. I now have an emergency start battery in the tool kit.
I had a diesel corsa that was a pig to start in winter, battery turned the motor over just fine. Turned out that when the starter motor was turning, the battery voltage dropped to between 9 and 10 volts which wasn't enough to operate the injectors.
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If you put the watt meter between the battery and the Y lead it measures the current drawn by both motors. If you place the watt meter between the Y lead and either of the ESCs it will give you information for that motor/ESC only.
Simples!
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5 hours ago, Brian Cooper said:
Obviously related to King Charles, probably a "Fitzroy".
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1 hour ago, Philip Lewis 3 said:
Is this definitely Royal Mail (who I believe don't transport LiPo's) or Parcel Force (who I believe do)?
I don't think parcel force will accept "naked" lipo batteries either.
Had to return a laptop battery not long ago and had to use UPS who would accept them if you declared them and they provided the appropriate label for the parcel.
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1 minute ago, Simon Chaddock said:
I did add a 😉 concerning the gyro.
On the other hand I am not keen on white knuckle rides so when I maiden an own design with un proven aerodynamics I do fit a gyro but in rate mode so no positive stabilisation. Hopefully this slows down the plane reactions enough for my 'old age' eye/hand coordination to keep up.
First time I enabled a gyro in flight, the model went crazy.
Memo to self, ensure gyro moves control surfaces in the right direction before flight!
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34 minutes ago, Lindsay Todd said:
Ever closer to first flight, paint finish now well on the way, still a bit of cutting back to do but going for that well used look.
The prop shown so far is just one hanging around and is only a 9X6 but the eventual is likely to 11-12 inch so that will mitigate a bit of the thrust / drag issues
The battery sits right behind the motor in the cooling duct, actually a nice feature and gives easy access.
Gyro? how very dare you sir, this will be a white knuckle ride!
Linds
How about:
Automated
Recovery
Services
England
Run by the Trotters of course.
or Father Jack Hackett.
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1 hour ago, Kim Taylor said:
Lipo's arrived by Royal Mail this morning - dispatched yesterday, so very surprised to see them and lucky I was in. 😀
Kim
Royal Mail won't take lipo batteries unless contained within electronic equipment. Hobbyking will get a severe talking to when they're found out.
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Make sure that the two grub screws holding the motor in the mount are both present and tight. A fellow club member maidened his aggressor and after 30 seconds the motor came out of the mount and, fortunately, stopped. On examination, the motor had first spun around winding up the leads all the way back to the ESC and then came out of the mount at which point one of the leads was ripped out of the motor causing it to stop. Required a new motor and , as a precaution, an ESC as we were unsure whether the broken lead had shorted the supply from the ESC.
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6 hours ago, Basil said:
Hello fellow posters,!!!! After some input from Nick I bought one of those 2s Lipo battery packs for my DX7S TX. The pack includes a built in balance etc. I have been getting my Lipo's ready for some down time due to the rough weather. It has occurred to me what should I do with the Lipo just installed in my TX. Do they also need to be returned to a level for storage or stored at full charge?
Any comments. Many thanks Bas
My transmitter battery gets stored at whatever level of charge it is at when I last used it, unless it's a spare destined for long term storage in which case I will take it down to storage charge level. Not had a problem yet (touch wood). As the Tx requires a very low current it's not exactly taxing the battery and even a misused battery should power it for a reasonable amount of time.
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26 minutes ago, Geoff S said:
Microsoft would find it difficult to find my photos. I have 3 physical HD on my PC and 2 are partitioned into separate drives. So none of my data (inc photos) is on drive C, which is reserved for the OS, but is distributed into relevant folders and sub-folders. I like to know where my data are stored 🙂
Same here, C drive for operating system and programs, three other physical drives which comprise one large drive for main storage, two other hard drives for backup, all in removable caddies and two portable drives as secondary back up. Nice to find someone else who knows that "data" is a plural word.
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14 hours ago, Martin Harris - Moderator said:
This works for me!
Not if you tread on it in bare feet!😧
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16 hours ago, Frank Skilbeck said:
Another thing to consider is whether blast overpressure was design consideration, the heat would cause an increase in hydrocarbon vapours, when this reaches the lower explosive limit (LEL) then you basically get an explosion which causes a significant over pressure, it is part of the design of an oil and gas production facility to ensure the structure can withstand this, as is the safe routing of hydrcarbon vapours from vessels subjected to a pool fire. The sprinkler system also keeps the vessels cool to prevent the steel from weakening which could lead to a Boiling Liquid Expanding Vapour Explosion, but in these systems the sprinklers are mounted directly on the vessel. In a carpark they would be spraying the body work and not necessarily cooling the fuel tank, so maybe you would need ground based sprinklers under every car.
Brought back memories of Flixborough.
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23 minutes ago, Ron Gray said:
My own experience says otherwise!
Probably depends on the lipo.
My first set of lipo batteries were stored fully charged over one winter as I knew no better, most are severely compromised, effectively useless apart from low current applications and one became spherical when I charged it.
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5 minutes ago, John Lee said:
On 2200MAh and up I discharge to storage at 6amps using the ISDT 100.
I do find it a very handy tool for battery management. I started using it some 6 years ago and developed a habit of returning all my batteries to storage voltage after every flying session, charging or discharging as required. It does seem to keep the batteries in much better condition than my previous rather casual approach and puffiness has been all but eliminated.
Same here, 3Ah 3s battery discharged at 6 amp with an ISDT100 much quicker than discharging with my Radient Duplex charger which discharges 2 batteries at 0.8 amps each
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3 minutes ago, Simon Chaddock said:
Basil
Repeated simple charging of a 2s LiPo is likely to result in the cells becoming out of balance. It is almost impossible to build two truly identical LiPo cells. LiPo chargers must stop charging when a cell reaches 4.2 volts but without an individual dell connection the charger can only stop when for a 2s the battery reaches 8.4V. If the cells are out of ballance this will mean the cell that reaches 4.2V first will continue to get charged until the lower one catches up. Over charging a LiPo does it no good at all and can lead to a thermal runaway.
A thrid wire connected to the pack mid point allows the charger to 'see' both indiviual cell voltages however to be any use the charger must have a balance charging capability i.e cutting the charge to the full cell whilst leaving the charge on to the lower voltage one.
This process is avoided with NiMh cells as they can be safely overcharged a low rate until all the cells are full. A NiMh charger will drop to a suitable low charge rate once the battery reaches a cetain voltage.
Unless your Spektrum charger has the approrpiate 3 wire balance charging facility it will not be able to charge a 2s LiPo pack properly or tafely.
I hope this helps.
I believe that the both the Spektrum and Turnigy batteries have built in balancing circuits and so can be charged using just 2 wires. Seems to work for mine.
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2 hours ago, J D 8 said:
I also read of the rouge Lancaster, it belonged to 617 squadron and disliked by those that flew it. Eventually it was discovered that the elevators were reversed and so the were also upside down.
I never knew they applied makeup to Lancasters, you live and learn!
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Sign of the times - funnies * Remember this is a family friendly forum and inappropriate postings will be removed without warning.
in Chit-chat
Posted
Sage advice!