Here is a list of all the postings Shaun Walsh has made in our forums. Click on a thread name to jump to the thread.
|Thread: C rating on Lipo's|
Depends on the current draw of the motor and the ampere hour rating of the battery.
I fly using 3s lipos. My 2200 lipos are rated at 45c continuous which means that in theory they can supply 99 amps without going above their rating. My 3000 lipos are rated at 15c continuous which means they can supply 45 amps continuous, less than half the figure for the 2200s.
In practice there is no performance difference between the two because the motor they power draws a maximum of 25 amps, well within the rating both batteries.
So multiply the ampere hour rating of the battery by its c rating, If the figure you get is greater than the current actually drawn by the EDF then all is well and the bigger the margin the less strain on the battery.
|Thread: Bills Kits Mirage 2000|
If you have a nearby hill you could forget the motor and PSS it
Pusher folding props are like hen's teeth, not only do you have to find blades with pusher orientation (or reverse the motor) but you have to stop the blades crossing when stationary which means that they don't open out when the motor restarts and can cause severe vibration. I've been trying to find a suitable folding pusher for a glider power pod project and will have to make my own or used a fixed pusher.
Bungey or catapult launching sounds a sensible alternative to an undercarriage
Use a tractor prop reverse the motor rotation and use threadlock on the prop nut?
3 or 4 blade 10" prop?
I'm no expert but how about something like this?
Running on a 6s should give you around 13k rpm and 150 watts/Lb if my calcs are correct.
Agree that 10" a bit small for a model that large but if it worked with a 60 nitro it might be worth a go.
Edited By Shaun Walsh on 26/02/2019 16:52:56
|Thread: Lipo advice|
As long as the C rating multiplied by the ampere hour capacity of the battery comfortably exceeds the current rating of the ESC/motor then you should be OK
For example I use Turnigy Graphene batteries, a 3s 2200 65c gives me 5 minutes flying, a 3s 3000 15c gives me 7 minutes pulling a max of around 25 amps. They both end up approximately the same temperature at the end (barely warm) and are both the same size/weight. However if I was to try to fly something requiring more than 45 amps the 2200 battery would be fine, the 3000 probably not so good.
Regarding chargers, don't forget to decide whether you want a mains or low voltage charger run off separate mains power supply or car battery or one that will run off either power supply.
I use this **LINK** and it has been very good.
|Thread: Electric setup advice|
|Yes we were made of sterner and oilier stuff and spoke loudly so we could be heard above the noise of a 2 stroke 60 with a venturi exhaust 😳|
|Thread: Eternally optimistic|
Not sure if this is OTT optimism or a bad case of fat fingers when setting up the advert.
I'll have 2 at that price
|Thread: FHSS flavours|
I thought that might be the case, never mind.
Thanks for the quick reply.
I purchased at pocket money prices an Axion Excell 200 micro helicopter which was great to learn on. I also purchased an Axion Polykarpov for indoor/calm outdoor use again for peanuts. The transmitter for both is an Axion AX-4CT which says it uses FHSS technology.
Now the question is are all flavours of FHSS the same? Will the Axion transmitter work with other manufacturers' FHSS receivers?
Edited By Shaun Walsh on 17/01/2019 10:12:33
|Thread: Best Heating Option For Your Hobby Shed|
Best heating option for hobby shed? Large single malt, but don't expect what you build to fly straight!
|Thread: CDI interference?|
|Does the CDI unit have any form of interference suppression built in, could it be failing after a few minutes use and then reverting to normal operation when the engine is turned off? From experience with car CDI units they put out a lot of voltage and produce a fat spark but can also produce a lot of radio interference.|
|Thread: Voltage sensor|
|I presume SLA means sealed lead acid battery.|
|Thread: Aerostar 40 amp speed controller|
|Bought a slowpoke in the hobbyking sale, it went together OK despite the instructions 🤔|
Bound OK to a spektrum transmitter /receiver but when you throttle up the first thing that happens is that the motor pulses, increase the throttle a bit more and the motor idles steadily and increasing the throttle more gives progressively more power. Can anyone tell me why the motor pulses with the first increase in throttle?
|Thread: BT internet email|
AFAIK BT's fibre offering is FTTC (fibre to the cabinet) not FTTP (fibre to the premises) so the fibre cable goes to the green box somewhere close to the house (in my case about 100 yards away) and the last leg is completed on the legacy copper phone wire. If you live close to the cabinet you can get good speeds without the need to lay a fibre into the apartment. In my case I get 50 Mb/sec down and 12 Mb/sec up consistently
I have been with BT for some time with, so far (kiss of death alert!), no issues. I use Firefox and Yahoo mail on BT's 50 Mb/sec FTTC and have not seen a problem. I actually get 51 Mb/sec down and 12 Mb/sec up which is fine for my needs.
A year or so ago BT had an offer on which was cheaper than I was paying at the time so I called them up and said if they gave me the deal I would sign up for another contract period as the previous one had expired. They were happy to do so, when this contract expires I will do the same again.
The other advantage of using BT is that there is no argument between BT and the ISP about where the source of any problems lie, if there is a problem it's down to BT to fix as it's all their system.
|Thread: lipo battery charger|
|I started with a cheap hobbyking accucell s60 charger, it still works ok but the fan became a bit noisy so I bought a JP Radiant duplex II from Steve Webb, very versatile and seems well made.|
Edited By Shaun Walsh on 14/11/2018 13:57:13
Edited By Shaun Walsh on 14/11/2018 14:12:18
|Thread: Civil Engineering advice needed|
|We had a similar problem in our previous house.|
It was sorted when the police removed the body that the previous owner had covered with the patio.
|Thread: Sign of the times - funnies|
Alternatively, see the quote from the film "Lawrence of Arabia" below
Edited By Shaun Walsh on 20/10/2018 07:55:35
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