28 Mar 2024, 13:46 [ UTC - 5; DST ]
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 03 Jul 2018, 17:07 |
|
|
|
|
Joined: 08/30/13 Posts: 409 Post Likes: +71 Company: Cruce Aircraft Services Location: KPGD
Aircraft: Learjet 55, C-310
|
|
Not the same airplane but an a/c question, if you have electric a/c can you keep the batteries off when you hook to an apu and run the a/c? Only plane I’ve had a/c in was a Learjet and you have to turn on a battery momentarily to close the curcuit to the apu.
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 03 Jul 2018, 20:58 |
|
|
|
|
Joined: 08/30/13 Posts: 409 Post Likes: +71 Company: Cruce Aircraft Services Location: KPGD
Aircraft: Learjet 55, C-310
|
|
Username Protected wrote: My plane is equipped just like many new Cessnas. Done under the same STC. Hook up the gpu and hit a button on the outside of the aircraft. A/C turns on and pre-cools the interior. Pretty cool (no pun intended). That’s all that’s required. A lineman at the FBO doesn’t have to get in the aircraft and do anything.
All electric, so no restrictions on take-offs or landings. That’s pretty awesome.
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 04 Jul 2018, 08:03 |
|
|
|
|
|
Joined: 08/15/11 Posts: 2388 Post Likes: +1055 Location: Mandan, ND
Aircraft: V35
|
|
Username Protected wrote: My plane is equipped just like many new Cessnas. Done under the same STC. Hook up the gpu and hit a button on the outside of the aircraft. A/C turns on and pre-cools the interior. Pretty cool (no pun intended). That’s all that’s required. A lineman at the FBO doesn’t have to get in the aircraft and do anything.
All electric, so no restrictions on take-offs or landings. That’s pretty awesome.
Agreed. That is pretty neato!
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 03 Sep 2018, 23:15 |
|
|
|
|
Joined: 12/07/17 Posts: 7026 Post Likes: +5805 Company: Malco Power Design Location: KLVJ
Aircraft: 1976 Baron 58
|
|
I’m wondering if there’s any way to have the AC turn on automatically when power is applied to the external port. I’ve got a Baron 58 that’s getting the same electric AC as above and I’d like to put it on one of the cell phone switches that everyone uses for their Tanis heaters. Then I could call the hangar half an hour before I get there and have the plane all cooled off.
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 10 Sep 2018, 21:34 |
|
|
|
|
|
Joined: 12/10/07 Posts: 30424 Post Likes: +10534 Location: Minneapolis, MN (KFCM)
Aircraft: 1970 Baron B55
|
|
Username Protected wrote: I’m wondering if there’s any way to have the AC turn on automatically when power is applied to the external port. I’ve got a Baron 58 that’s getting the same electric AC as above and I’d like to put it on one of the cell phone switches that everyone uses for their Tanis heaters. Then I could call the hangar half an hour before I get there and have the plane all cooled off. As long as you can power the AC from the external power connection without turning the bus master on all you'd need to do is switch the AC on after shutting down, connect the external power source to the airplane, and have the cellphone switch control the utility power to the external power source. My B55 is wired such that this would work just fine. I don't know if yours is the same but it's easy to check. Just connect an external power source and fire it up with the battery master off and see if the electrical equipment (e.g. beacon, strobes, flaps) works normally. One caution is that you need a well regulated external power source for this, not a battery charger or starting booster. The voltage output from the source needs to be close to 28 volts with no load as with the full load of the AC.
_________________ -lance
It's easier to fool people than to convince them that they have been fooled.
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 11 Sep 2018, 02:03 |
|
|
|
|
Joined: 12/26/17 Posts: 141 Post Likes: +74
|
|
Username Protected wrote: I’m wondering if there’s any way to have the AC turn on automatically when power is applied to the external port. I’ve got a Baron 58 that’s getting the same electric AC as above and I’d like to put it on one of the cell phone switches that everyone uses for their Tanis heaters. Then I could call the hangar half an hour before I get there and have the plane all cooled off. As long as you can power the AC from the external power connection without turning the bus master on all you'd need to do is switch the AC on after shutting down, connect the external power source to the airplane, and have the cellphone switch control the utility power to the external power source. My B55 is wired such that this would work just fine. I don't know if yours is the same but it's easy to check. Just connect an external power source and fire it up with the battery master off and see if the electrical equipment (e.g. beacon, strobes, flaps) works normally. One caution is that you need a well regulated external power source for this, not a battery charger or starting booster. The voltage output from the source needs to be close to 28 volts with no load as with the full load of the AC. Don't think it would work on this system - the switches to turn AC on are not mechanical switches - it is a digital type keypad which defaults to off and can't be turned on without FIRST having power.
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 11 Sep 2018, 23:45 |
|
|
|
|
|
Joined: 12/10/07 Posts: 30424 Post Likes: +10534 Location: Minneapolis, MN (KFCM)
Aircraft: 1970 Baron B55
|
|
Username Protected wrote: Don't think it would work on this system - the switches to turn AC on are not mechanical switches - it is a digital type keypad which defaults to off and can't be turned on without FIRST having power. That's unfortunate. Perhaps the manufacturer of the AC would be willing to add an external switch input or keypad entry to "arm" the controller for startup the next time power is applied. It would be fairly simple to do that from a technical perspective and with just a little more effort the controller could even be programmed to recognize the difference between firing up on external power vs turning the battery master on prior to starting the engine. Depending on the required user input to start the AC, it might be possible to rig a mechanical device that "presses" the appropriate switch(es) causing the AC to turn on when power is applied. Worst case it would involve a small solenoid and a simple circuit to delay the button activation as needed after the external power comes on.
_________________ -lance
It's easier to fool people than to convince them that they have been fooled.
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 12 Sep 2018, 17:23 |
|
|
|
|
Joined: 12/07/17 Posts: 7026 Post Likes: +5805 Company: Malco Power Design Location: KLVJ
Aircraft: 1976 Baron 58
|
|
Username Protected wrote: Don't think it would work on this system - the switches to turn AC on are not mechanical switches - it is a digital type keypad which defaults to off and can't be turned on without FIRST having power. That's unfortunate. Perhaps the manufacturer of the AC would be willing to add an external switch input or keypad entry to "arm" the controller for startup the next time power is applied. It would be fairly simple to do that from a technical perspective and with just a little more effort the controller could even be programmed to recognize the difference between firing up on external power vs turning the battery master on prior to starting the engine. Depending on the required user input to start the AC, it might be possible to rig a mechanical device that "presses" the appropriate switch(es) causing the AC to turn on when power is applied. Worst case it would involve a small solenoid and a simple circuit to delay the button activation as needed after the external power comes on.
Yep, but now we're getting complicated. I will be getting a GPU so the AC can be running while I preflight though. Priorities...
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 15 Sep 2018, 14:15 |
|
|
|
|
|
Joined: 12/10/07 Posts: 30424 Post Likes: +10534 Location: Minneapolis, MN (KFCM)
Aircraft: 1970 Baron B55
|
|
Username Protected wrote: That's unfortunate. Perhaps the manufacturer of the AC would be willing to add an external switch input or keypad entry to "arm" the controller for startup the next time power is applied. It would be fairly simple to do that from a technical perspective and with just a little more effort the controller could even be programmed to recognize the difference between firing up on external power vs turning the battery master on prior to starting the engine.
Depending on the required user input to start the AC, it might be possible to rig a mechanical device that "presses" the appropriate switch(es) causing the AC to turn on when power is applied. Worst case it would involve a small solenoid and a simple circuit to delay the button activation as needed after the external power comes on. Yep, but now we're getting complicated. I will be getting a GPU so the AC can be running while I preflight though. Priorities... Uncomplicated, capable, and inexpensive. At best you can usually get two of three and often it's down to one.
_________________ -lance
It's easier to fool people than to convince them that they have been fooled.
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 15 Sep 2018, 18:41 |
|
|
|
|
|
Joined: 01/07/08 Posts: 2824 Post Likes: +432 Location: Walnut Creek, CA (KCCR)
Aircraft: 1979 Baron 58P
|
|
Username Protected wrote: All electric, so no restrictions on take-offs or landings.
I have never understood this argument. What about an electrical A/C system distinguishes it in this way? You’re still using engine power to run it.
|
|
Top |
|
Username Protected
|
Post subject: Re: Voltage & Amperage Readings - T182T and GPU, with A/C Posted: 16 Sep 2018, 22:45 |
|
|
|
|
|
Joined: 12/10/07 Posts: 30424 Post Likes: +10534 Location: Minneapolis, MN (KFCM)
Aircraft: 1970 Baron B55
|
|
Username Protected wrote: All electric, so no restrictions on take-offs or landings.
I have never understood this argument. What about an electrical A/C system distinguishes it in this way? You’re still using engine power to run it.
A 100A 28v alternator produces a maximum 2800W and assuming around 90% efficiency that's about 4HP. A fully loaded automotive type AC compressor can load the engine about three times that. Also, the load will never be more than the alternator's rating vs a mechanically driven compressor which will allow the load to increase dramatically if the compressor output is restricted sufficiently. It's probably not the fact that it's electrically powered, just the lighter and limited load that allows it to be run on takeoff.
_________________ -lance
It's easier to fool people than to convince them that they have been fooled.
|
|
Top |
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum
|
Terms of Service | Forum FAQ | Contact Us
BeechTalk, LLC is the quintessential Beechcraft Owners & Pilots Group providing a
forum for the discussion of technical, practical, and entertaining issues relating to all Beech aircraft. These include
the Bonanza (both V-tail and straight-tail models), Baron, Debonair, Duke, Twin Bonanza, King Air, Sierra, Skipper, Sport, Sundowner,
Musketeer, Travel Air, Starship, Queen Air, BeechJet, and Premier lines of airplanes, turboprops, and turbojets.
BeechTalk, LLC is not affiliated or endorsed by the Beechcraft Corporation, its subsidiaries, or affiliates.
Beechcraft™, King Air™, and Travel Air™ are the registered trademarks of the Beechcraft Corporation.
Copyright© BeechTalk, LLC 2007-2024
|
|
|
|