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May 01, 2012, 05:45 PM
Registered User
E_ferret's Avatar
Quote:
Originally Posted by SIRCOL
2 life cells 18mmx65 mm side by side will fit in the place of a 8 cell nicad pack
(4x4x2 ) thats what in the JR XG11 you fit them on the diagonal
note that the ZIPPY 1800 LIFE tx battery sold by Hobby King is just a tad too wide to fit in an old JR 388S. rotating the pack does not help, then it is too high to fit.
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May 01, 2012, 06:26 PM
I don't want to "Switch Now"
pmackenzie's Avatar
Quote:
Originally Posted by dirtybird
This equipment will be used to control large scale gas airplanes and jet aircraft capable of 200+mph. This is flight critical software, as much so as the software used in the aerospace industry. It should be tested and certified as per the guidelines of DO-178-B.
Can you provide some evidence that any other manufacturer of radios does this?

Pat MacKenzie
May 01, 2012, 08:51 PM
Registered User
Quote:
Originally Posted by SIRCOL
2 life cells 18mmx65 mm side by side will fit in the place of a 8 cell nicad pack
(4x4x2 ) thats what in the JR XG11 you fit them on the diagonal
Good point. A 28x28 square has a 39mm diagonal so I can see how that would work. Thank you for pointing that out.
I added a correction to my earlier post.
May 01, 2012, 09:05 PM
Flying Half Pound and Down
DaOldGuy's Avatar
Quote:
Originally Posted by pmackenzie
Can you provide some evidence that any other manufacturer of radios does this?

Pat MacKenzie
I personally like this part of the doc and find that it sums up the value of the testing that pertains to the risk being managed.

Consider two aircraft examples
– 1) Software controlling the coffeemakers in the aft galley fails
• Outcome: Likely some grumpy customers, but passenger safety not
compromised (air rage issues due to lack of coffee aside)
– 2) Software controlling the aircraft during an automatic landing in zero
visibility conditions fails
• Outcome: Possibly catastrophic and lives lost
May 01, 2012, 10:41 PM
Registered User
Quote:
Originally Posted by pmackenzie
Can you provide some evidence that any other manufacturer of radios does this?

Pat MacKenzie
Probably not but they should.There are requirements for the hardware that must be met and they do. Its time to control the software. The software controls the hardware.
I would think they would want to do this in order to protect themselves in case something serious happens.
I was sitting in a stands at a jet rally in Phoenix watching the jets turn toward the runway. When they did this they had us in their aiming point for a large part of the turn on the final. All it would take is a short lapse of control for the jet to plow into the stands. I decided it was not a safe place to sit.
If something does happen you can be sure it wont be long before the FAA steps in and creates some restrictions.
May 02, 2012, 12:27 AM
↓↘→ + (punch)
theKM's Avatar
Quote:
Originally Posted by dirtybird
Probably not but they should.There are requirements for the hardware that must be met and they do. Its time to control the software. The software controls the hardware.
I would think they would want to do this in order to protect themselves in case something serious happens.
I was sitting in a stands at a jet rally in Phoenix watching the jets turn toward the runway. When they did this they had us in their aiming point for a large part of the turn on the final. All it would take is a short lapse of control for the jet to plow into the stands. I decided it was not a safe place to sit.
If something does happen you can be sure it wont be long before the FAA steps in and creates some restrictions.
...you should take a moment to read the other threads about how seriously Jim regards safety through reliability of products. Not just this industry but others as well...
May 02, 2012, 12:51 AM
Registered User
Jim,

How about adding a rectifier bridge for the batts input to make the polarity of the battery connector a non-issue, like the new Spektrum DX7s? Probably won't cost much, and would get rid of ALL battery polarity problems/worries when plugging in the tx battery.

chewy
May 02, 2012, 01:40 AM
Expo is built into my thumbs
Hance's Avatar
Quote:
Originally Posted by JimDrew
No battery is included. The input connection is a red two pin JST plug (common for small Lipos). The battery compartment is designed the traditional 8 AA type drycell batteries or Nicd/Nimh battery pack. Typical current draw ranges between 60mA and 90mA (full power), depending on the frame rate. So, a 2200mAh 2S Lipo is lasting about 24 hours of continuous on time. Obviously, we don't fly that way and since it has auto-power off, it won't let itself be left on by accident. So, the battery will last a long time.
I think all you guys worried about the battery need to step back and contemplate Jim's post. All but the most hardcore users will be able to go for weeks with out having to charge the transmitter. Most people I see flying don't do more than a dozen flights in a day. A dozen ten minute flights is two hours of run time per flying day. With about 24 hours of runtime out of a 2200mah pack that's a dozen flying days between charges.

Just grab a battery that will fit in the transmitter and don't worry about it. If you are really that concerned get a spare battery THEY ARE CHEAP.
May 02, 2012, 06:58 AM
Registered User
hook57's Avatar
["I decided it was not a safe place to sit.
If something does happen you can be sure it wont be long before the FAA steps in and creates some restrictions."

Not arguing your point, but I seriously doubt the FAA will be getting involved in something that is intended for sport/recreation use. Being responsible and being safe is being defensive (as in looking out for one's self) as you did in that situation. Not saying that the CD or sponsor shouldn't look at spectator safety, just saying....
hook
May 02, 2012, 08:48 AM
Registered User
Quote:
Originally Posted by Hance

Just grab a battery that will fit in the transmitter and don't worry about it. If you are really that concerned get a spare battery THEY ARE CHEAP.
But it has to be a perfect battery, just like the one the smart guy in the club told me about...
May 02, 2012, 10:38 AM
Xtreme Power Systems
Quote:
Originally Posted by chewytm
Jim,

How about adding a rectifier bridge for the batts input to make the polarity of the battery connector a non-issue, like the new Spektrum DX7s? Probably won't cost much, and would get rid of ALL battery polarity problems/worries when plugging in the tx battery.

chewy
The voltage regulation system with soft on/off already has this protection built in. You can attach the battery backwards and nothing happens.
May 02, 2012, 10:46 AM
Look Up
CiprianGugu's Avatar
Quote:
Originally Posted by JimDrew
The voltage regulation system with soft on/off already has this protection built in. You can attach the battery backwards and nothing happens.
Jim, but if you attach the battery backwards the radio will not work, correct? But the radio will not fry.
May 02, 2012, 11:46 AM
↓↘→ + (punch)
theKM's Avatar
...I can't say I've ever managed to connect a red JST connector backwards, you would have to reshape the male plug to do it. the plug in the Aurora 9, you have to get at it from an angle, there's no shroud around the receiving female, and you can indeed get that to connect up incorrectly... and it doesn't like it, magic smoke will happen. having the radio do nothing instead is perfect.
May 02, 2012, 11:56 AM
Aeronca Driver
ch701's Avatar
But you can easily reverse the charging jack polarity and then magic smoke will appear instantly. Had a friend do it. Cooked the radio. Would not have happened it one had to remove battery for charging.

-john
May 02, 2012, 12:10 PM
Registered User
Tony37803's Avatar
Battery battery battery. Sheesh, enough already. Ask about the cool stuff!

Jim, use 4 AA's next time.


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