---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Thu 06/29/17: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:52 AM - Re: [Non-DoD Source] Re: Alternator Mod CJ-6A (cjpilot710@aol.com) 2. 05:54 AM - Another Air Problem (BTLYak) 3. 06:28 AM - Re: Another Air Problem (A. Dennis Savarese) 4. 06:37 AM - Re: Another Air Problem (Richard Hess) 5. 08:36 AM - Re: Alternator Mod CJ-6A (jay-dub) 6. 09:11 AM - Re: [Non-DoD Source] Another Air Problem (Bitterlich, Mark G CIV NAVAIR, WD) 7. 05:47 PM - GoPro comm and power connection....for sale. (HawkerPilot2015) 8. 05:48 PM - Re: Butler Parachute....seat (HawkerPilot2015) ________________________________ Message 1 _____________________________________ Time: 04:52:46 AM PST US From: cjpilot710@aol.com Subject: Re: [Non-DoD Source] Re: Yak-List: Alternator Mod CJ-6A Mark hit on a list of things on why to change over to an alternator. All are very valid. To me weight almost alone, is the most significant. It requires two arms to carry that generator. Not so the alternator. In these airplanes pounds count. When I got my CJ, it was right out of the box from China. I removed over 186 POUNDS of radios and their needed wiring. After adjusting the CG with ballast, I was able to realized 133 POUNDS of payload increase. After installing the M14p, which heavier than the HS6, I found that changing over the alternator, I would NOT have to add as much ballast to compensate if I kept the generator. In aircraft of this size - every pound counts. BTW anyone need a nice room at OSH? Jim "Pappy" Goolsby In a message dated 6/28/2017 3:59:43 P.M. Eastern Daylight Time, mark.bitterlich@navy.mil writes: --> Yak-List message posted by: "Bitterlich, Mark G CIV NAVAIR, WD" It depends on your particular system. I have not worked on CJ-6's, but with the Russian designs you are dealing with a list of parts that can sometimes be difficult to troubleshoot. Generator Voltage Regulator Over-Voltage control DMR-200 device, which consists of a reverse current relay, main contactor relay, etc. Bucking transformer These devices are actually reminiscent of any of the older generator designs found in airplanes and cars. Remember that several decades ago, all automobiles and airplanes ran generators and not alternators. Electrical design advancements let to the alternator as a more efficient, lighter weight, and easier to troubleshoot device. The reasons for switching an airplane from a generator design to one that uses an alternator are just as valid today as they were years ago. More than anything else, they are cheaper (at least from an initial design perspective). That said, there is nothing wrong with using a generator, and there is also the saying: "If it works, don't fix it", but many aircraft owners with generator systems decide to go with an alternator design, especially when they start having problems, and often-times to save weight and improve reliability. Mark -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Bob Graves Sent: Wednesday, June 28, 2017 1:51 PM Subject: [Non-DoD Source] Re: Yak-List: Alternator Mod CJ-6A I've had my CJ for three years now. Never had an electrical issue. Why would I want to switch to an alternator? There must be some good reasons. GiddyUp, Bob On Jun 28, 2017, at 12:51 PM, George S. Coy wrote: We have the mounting plates in George Coy MotorstarNA 714 Airport Rd. Swanton VT 05488 802-868-5633 off 802-363-5782 cell 802-868-6632 Fax george.coy@gmail.com http://motorstarna.com/ SKYPE george.coy stock as well. $45.00. From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of JON Sent: Wednesday, June 28, 2017 8:36 AM Subject: Re: Yak-List: Alternator Mod CJ-6A I purchased my mounting plate from Doug Sapp. JB ________________________________ From: "jay-dub" Sent: Tuesday, June 27, 2017 4:19:06 PM Subject: Yak-List: Alternator Mod CJ-6A Please could someone confirm EXACTLY the parts I need for the B&C alternator conversion. So far, BC412 35amp alternator, LS-1A voltage regulator and an M14P generator mounting plate (?). It will be done by my maintenance organisation, not me. That said, any top tips gratefully received. Thanks. -------- CJ and Yak-52 owner Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470528#470528 &nbs================ ________________________________ Message 2 _____________________________________ Time: 05:54:47 AM PST US Subject: Yak-List: Another Air Problem From: "BTLYak" Yak-52 Start: Good on 3+ air Air: 3 on take-off Gear, would not retract. Recovered on EMG air. Refilled system to 5+ Start, taxi, TO, 3+ on air, still no gear retraction. Cleaned and serviced the banjo fitting, soaked check valve in gas overnight. System holds air. Questions: How long does it take to increase system air pressure during a ground run? What else could be the problem? -------- "Battle Yak" Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470582#470582 ________________________________ Message 3 _____________________________________ Time: 06:28:34 AM PST US Subject: Re: Yak-List: Another Air Problem From: "A. Dennis Savarese" If you recently did a gear retraction test, did you bleed off the air by squeezing off the brakes until the "fart valve" wentoff? What's happening is the shuttle valveballs are either pushed over blocking the main air side (that's why the gear won't retract) or a check valve under the floor in the rear cockpit is leaking, allowing air pressure when you turn on the main air valveto fill the emergency side, thus pushing the shuttle valve ballsagain blocking the main side of the shuttle valve. Until you find and fix the leak in the main system, you may not be able to build pressure above what you're already seeing. I have only seen the following once in 18 years. There are two check valve located at the entry to brake reducing valve under the floor in the rear cockpit. One isolates the main side and the other isolates the emergency side. If the check valve that isolates the emergency side leaks, it will allow the airflowing through the main side check valve to pass over to the emergency side, thus pushing the shuttle valve balls over where they block the main air side of the shuttle valve. As long as there is pressure on the emergency side of the shuttle valve, you will not be able to retract the gear until you eliminate the pressure on the emergency side when the main air is turned on. The only time there should be air pressure on the emergency side is when you open the emergency air valveto extend the gear. Then after you extend the gear with the emergency side, you must bleed off the air in the system before you reopen the main air valve. When you've bled off the air from the emergency extension, then open the main air valve, the main air pressure will move the shuttle valve balls back against the emergency side of the shuttle valve, thus allowing thegear to be retracted normally. Dennis A. Dennis Savarese 334-546-8182 (mobile) www.yak-52.com Skype - Yakguy1 On 6/29/2017 8:51 AM, BTLYak wrote: > > Yak-52 > > Start: Good on 3+ air > > Air: 3 on take-off > > Gear, would not retract. > > Recovered on EMG air. > > Refilled system to 5+ > > Start, taxi, TO, 3+ on air, still no gear retraction. > > Cleaned and serviced the banjo fitting, soaked check valve in gas overnight. > > System holds air. > > Questions: > > How long does it take to increase system air pressure during a ground run? > > What else could be the problem? > > -------- > "Battle Yak" > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=470582#470582 > > ________________________________ Message 4 _____________________________________ Time: 06:37:23 AM PST US From: Richard Hess Subject: Re: Yak-List: Another Air Problem Emergency air holding gear down Richard Hess C 404-964-4885 > On Jun 29, 2017, at 7:51 AM, BTLYak wrote: > > > Yak-52 > > Start: Good on 3+ air > > Air: 3 on take-off > > Gear, would not retract. > > Recovered on EMG air. > > Refilled system to 5+ > > Start, taxi, TO, 3+ on air, still no gear retraction. > > Cleaned and serviced the banjo fitting, soaked check valve in gas overnight. > > System holds air. > > Questions: > > How long does it take to increase system air pressure during a ground run? > > What else could be the problem? > > -------- > "Battle Yak" > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=470582#470582 > > > > > > > > > ________________________________ Message 5 _____________________________________ Time: 08:36:06 AM PST US Subject: Yak-List: Re: Alternator Mod CJ-6A From: "jay-dub" George, You have mail. -------- CJ and Yak-52 owner Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470590#470590 ________________________________ Message 6 _____________________________________ Time: 09:11:45 AM PST US From: "Bitterlich, Mark G CIV NAVAIR, WD" Subject: RE: [Non-DoD Source] Yak-List: Another Air Problem After you reset the toggle valves on each gear (as several others have mentioned), put the aircraft on jacks and test it there. You will hear any leaks, and be able to carefully observe proper operation. If you are having problems with the landing gear, the place to check the problem is not in flight. Mark -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of BTLYak Sent: Thursday, June 29, 2017 8:52 AM Subject: [Non-DoD Source] Yak-List: Another Air Problem Yak-52 Start: Good on 3+ air Air: 3 on take-off Gear, would not retract. Recovered on EMG air. Refilled system to 5+ Start, taxi, TO, 3+ on air, still no gear retraction. Cleaned and serviced the banjo fitting, soaked check valve in gas overnight. System holds air. Questions: How long does it take to increase system air pressure during a ground run? What else could be the problem? -------- "Battle Yak" Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470582#470582 ________________________________ Message 7 _____________________________________ Time: 05:47:06 PM PST US Subject: Yak-List: GoPro comm and power connection....for sale. From: "HawkerPilot2015" Used maybe 3 times. Retails for $40.00. Asking $30 with shipping. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470601#470601 Attachments: http://forums.matronics.com//files/img_4925_143.jpg http://forums.matronics.com//files/img_4925_202.jpg ________________________________ Message 8 _____________________________________ Time: 05:48:58 PM PST US Subject: Yak-List: Re: Butler Parachute....seat From: "HawkerPilot2015" Just repacked. $1400.00 plus shipping. 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