Instrumentation - Revision history

Markm at 17:52, 5 May 2021

2021-05-05T17:52:55Z

← Older revision		Revision as of 17:52, 5 May 2021
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	*[[Installing Mitchell Gauges]]		*[[Installing Mitchell Gauges]]
	*[[Installing a Horizon P-1000 tachometer]]		*[[Installing a Horizon P-1000 tachometer]]
			*[[Sensing Manifold Pressure]]

Bluejay at 15:39, 5 December 2010

2010-12-05T15:39:32Z

← Older revision		Revision as of 15:39, 5 December 2010
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	*[[Installing Mitchell Gauges]]		*[[Installing Mitchell Gauges]]
			*[[Installing a Horizon P-1000 tachometer]]

WikiSysop: Back Out Garbage Injection

2008-01-18T16:48:56Z

Back Out Garbage Injection

← Older revision		Revision as of 16:48, 18 January 2008
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	~~ropasdronr~~
	*[[Installing Mitchell Gauges]]		*[[Installing Mitchell Gauges]]

LicraClage: ricacelc4tr

2008-01-18T14:37:23Z

ricacelc4tr

← Older revision		Revision as of 14:37, 18 January 2008
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			ropasdronr
	*[[Installing Mitchell Gauges]]		*[[Installing Mitchell Gauges]]

Sbw at 14:55, 22 February 2006

2006-02-22T14:55:40Z

← Older revision		Revision as of 14:55, 22 February 2006
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	~~DRAFT NEW PAGE - ''Gil Alexander''~~		*[[Installing Mitchell Gauges]]


	~~== Installation of Mitchell Instrument STC gauge package. ==~~

	~~== NEEDS A&P SIGN-OFF - and a Form 337 filed for the STC. ==~~

	~~== Items needed but not supplied... ==~~


	1. #8 wire gauge ring terminals with 1/4 inch hole (instructions say to just use existing wiring, but my plane - 77 Tiger - used 3/16 terminals on the power wiring to the old ammeter, and the new shunt has 1/4 inch threaded terminals)

	~~2. New hoses to senders - I used new AN-4 firesleeved hoses - 10.5 inches for fuel pressure and 18 inches for oil pressure - but 16 inch would probably be better - see later pics.~~

	3. Clamps to mount the senders, 5/8 for the engine mount side and 1 9/16 for the two senders. Instructions call for all clamps to be cushioned [http://www.aircraftspruce.com/catalog/appages/ms21919clamps.php MS21919], however the oil pressure sender does not have a ground connection, and cushioned clamps do a good job of electrical isolation. Since my supply house did not have 1 9/16 plain clamps, I found that a 1 7/16 cushioned clamp with the rubber removed worked well. The AN3 bolt that is used to connect the small and large clamps can be used as a ground point for this sensor. The installation instructions ignore this....

	~~3. Usual assortment of #20 aircraft wire and good quality ring terminals and splices.~~

	~~4. You need to splice 3 or 4 wires into a single wire in four places, I found that soldering and a good quality heat shrink worked well. Check with your A&P on this and do what he/she prefers.~~

	5. Rubber "booties" to protect the exposed hot wires (when the Master is ON) on the ammeter shunt - not essential, but a nice safety feature to have - [http://www.aircraftspruce.com/catalog/elpages/termnips.php MS25171-1] (2).

	~~6. AN929-4D caps (2)- to seal off the old fittings that penetrated the firewall.~~

	~~7. AN910-1D couplings (2) and AN816-4D (2) pipe thread to flare fitting to connect the sensors to the hoses.~~

	~~== Wiring the gauges ==~~

	The gauges need quite a bit of work wiring before any installation occurs. Since each gauge is a separate module, all of the common wiring (power, grounds, lighting) needs to be connected together. This is how I did it.... top of module is on the left.

	[[~~Image:~~Mitchell~~-gauge-wiring-A.JPG~~]]

	When this package wiring is completed, you should have ends for - two red wires to the ammeter shunt - two ground wires, meter ground and lights ground - a lighting power connection - a hot 12 volt connection (direct to bus, not through an Avionics switch), fused or breakered - and finally three sensor wires.

	I chose to get power from a new 1 Amp breaker, since I had to add one for the Horizon tachometer I am adding at the same time. It was easy to just make it two new breakers. I placed them side by side under the new instrument stack. The STC says to use the power wire that was connected to the original instruments - via the fuse shared with the strobes.

	~~''<still in progress...>''~~

Az gila: /* Wiring the gauges */

2006-02-22T05:29:01Z

Wiring the gauges

← Older revision		Revision as of 05:29, 22 February 2006
Line 27:		Line 27:
	== Wiring the gauges ==		== Wiring the gauges ==

	The gauges need quite a bit of work wiring before any installation occurs. Since each gauge is a separate module, all of the common wiring (power, grounds, lighting) ~~need~~ to be connected together. This is how I did it.... top of module is on the left.		The gauges need quite a bit of work wiring before any installation occurs. Since each gauge is a separate module, all of the common wiring (power, grounds, lighting) needs to be connected together. This is how I did it.... top of module is on the left.

	[[Image:Mitchell-gauge-wiring-A.JPG]]		[[Image:Mitchell-gauge-wiring-A.JPG]]
Line 33:		Line 33:
	When this package wiring is completed, you should have ends for - two red wires to the ammeter shunt - two ground wires, meter ground and lights ground - a lighting power connection - a hot 12 volt connection (direct to bus, not through an Avionics switch), fused or breakered - and finally three sensor wires.		When this package wiring is completed, you should have ends for - two red wires to the ammeter shunt - two ground wires, meter ground and lights ground - a lighting power connection - a hot 12 volt connection (direct to bus, not through an Avionics switch), fused or breakered - and finally three sensor wires.

	I chose to get power from a new 1 Amp breaker, since I had to add one for the Horizon tachometer I am adding at the same time. It was easy to just make it two new breakers. I placed them side by side under the new instrument stack. The STC says to use the power wire that was connected to the ~~origial~~ instruments - via the fuse shared with the strobes.		I chose to get power from a new 1 Amp breaker, since I had to add one for the Horizon tachometer I am adding at the same time. It was easy to just make it two new breakers. I placed them side by side under the new instrument stack. The STC says to use the power wire that was connected to the original instruments - via the fuse shared with the strobes.

	''<still in progress...>''		''<still in progress...>''

Az gila: /* Items needed but not supplied... */

2006-02-22T05:27:29Z

Items needed but not supplied...

← Older revision		Revision as of 05:27, 22 February 2006
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	2. New hoses to senders - I used new AN-4 firesleeved hoses - 10.5 inches for fuel pressure and 18 inches for oil pressure - but 16 inch would probably be better - see later pics.		2. New hoses to senders - I used new AN-4 firesleeved hoses - 10.5 inches for fuel pressure and 18 inches for oil pressure - but 16 inch would probably be better - see later pics.

	3. Clamps to mount the senders, 5/8 for the engine mount side and 1 9/16 for the two senders. Instructions call for all clamps to be cushioned [http://www.aircraftspruce.com/catalog/appages/ms21919clamps.php MS21919], however the oil pressure sender does not have a ground connection, and cushioned clamps do a good job of electrical isolation. Since my supply house did not have 1 9/16 plain clamps, I found that a 1 7/16 cushioned clamp with the rubber removed worked well. The AN3 bolt that is used to connect the small and large clamps can be used as a ground point for this sensor.		3. Clamps to mount the senders, 5/8 for the engine mount side and 1 9/16 for the two senders. Instructions call for all clamps to be cushioned [http://www.aircraftspruce.com/catalog/appages/ms21919clamps.php MS21919], however the oil pressure sender does not have a ground connection, and cushioned clamps do a good job of electrical isolation. Since my supply house did not have 1 9/16 plain clamps, I found that a 1 7/16 cushioned clamp with the rubber removed worked well. The AN3 bolt that is used to connect the small and large clamps can be used as a ground point for this sensor. The installation instructions ignore this....

	3. Usual assortment of #20 aircraft wire and good quality ring terminals and splices.		3. Usual assortment of #20 aircraft wire and good quality ring terminals and splices.

Az gila: /* NEEDS A&P SIGN-OFF - and 337 filed for STC. */

2006-02-22T05:26:19Z

NEEDS A&P SIGN-OFF - and 337 filed for STC.

← Older revision		Revision as of 05:26, 22 February 2006
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	== Installation of Mitchell Instrument STC gauge package. ==		== Installation of Mitchell Instrument STC gauge package. ==

	== NEEDS A&P SIGN-OFF - and 337 filed for STC. ==		== NEEDS A&P SIGN-OFF - and a Form 337 filed for the STC. ==

	== Items needed but not supplied... ==		== Items needed but not supplied... ==

Az gila: /* Wiring the gauges */

2006-02-22T05:25:45Z

Wiring the gauges

← Older revision		Revision as of 05:25, 22 February 2006
Line 30:		Line 30:

	[[Image:Mitchell-gauge-wiring-A.JPG]]		[[Image:Mitchell-gauge-wiring-A.JPG]]

			When this package wiring is completed, you should have ends for - two red wires to the ammeter shunt - two ground wires, meter ground and lights ground - a lighting power connection - a hot 12 volt connection (direct to bus, not through an Avionics switch), fused or breakered - and finally three sensor wires.

			I chose to get power from a new 1 Amp breaker, since I had to add one for the Horizon tachometer I am adding at the same time. It was easy to just make it two new breakers. I placed them side by side under the new instrument stack. The STC says to use the power wire that was connected to the origial instruments - via the fuse shared with the strobes.

	''<still in progress...>''		''<still in progress...>''

Az gila: /* Items needed but not supplied... */

2006-02-21T22:50:50Z

Items needed but not supplied...

← Older revision		Revision as of 22:50, 21 February 2006
Line 23:		Line 23:
	6. AN929-4D caps (2)- to seal off the old fittings that penetrated the firewall.		6. AN929-4D caps (2)- to seal off the old fittings that penetrated the firewall.

	7. AN910-4D couplings (2) and AN816-4D (2) pipe thread to flare fitting to connect the sensors to the hoses.		7. AN910-1D couplings (2) and AN816-4D (2) pipe thread to flare fitting to connect the sensors to the hoses.

	== Wiring the gauges ==		== Wiring the gauges ==