Yak-List Digest Archive

Mon 03/31/08


Total Messages Posted: 12



Today's Message Index:
----------------------
 
     1. 08:43 AM - Re: CJ Aux FuelCJ Aux FuelCJ Aux FuelCJ Aux Fuel (Forrest Johnson)
     2. 09:13 AM - Re: CJ Aux FuelCJ Aux FuelCJ Aux FuelCJ Aux Fuel (Brian Lloyd)
     3. 09:23 AM - gear collapse, no uplocks? (Elmar Hegenauer)
     4. 03:52 PM - V530 spinner (doug sapp)
     5. 04:12 PM - Re: V530 spinner (Dee Conger)
     6. 04:13 PM - Re: gear collapse, no uplocks? (jon blake)
     7. 04:21 PM - Re: V530 spinner (doug sapp)
     8. 04:44 PM - Re: gear collapse, no uplocks? (A. Dennis Savarese)
     9. 07:22 PM - Re: gear collapse, no uplocks? (Walter Lannon)
    10. 08:21 PM - Re: V530 spinner (Larry)
    11. 08:32 PM - Re: gear collapse, no uplocks? (ByronMFox@aol.com)
    12. 09:23 PM - Re: gear collapse, no uplocks? (Walter Lannon)
 
 
 


Message 1


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    Time: 08:43:56 AM PST US
    From: "Forrest Johnson" <flushjohnson@charter.net>
    Subject: Re: CJ Aux FuelCJ Aux FuelCJ Aux FuelCJ Aux Fuel
    Do you have the tanks from Gill and Blackwell? If so the vent inlet has one way check valve in it to maintain a very small constant pressure created by ram air thru the vent system. I installed the tanks in my CJ 3 four years ago with no problems.I reviewed the vent system verry carefully an made some mod to the recomended procedures. I did not like the manual valve suggestion and the mod I made eliminated the need for the valves. Call me if you want to discuss. Cell 817 366 3150. The CJ ( N39YK) these tanks are in is now for sale. ----- Original Message ----- From: V. Walker To: yak-list@matronics.com Sent: Wednesday, March 26, 2008 9:59 AM Subject: Re: Yak-List: CJ Aux FuelCJ Aux FuelCJ Aux FuelCJ Aux Fuel Ooooh, I've missed you guys. LOL Thanks Brian, Walt, Pappy etc. for the wisdom on uneven fuel flow and bladder tanks. (Thanks also to Linedawg who emailed. He misses his Chang). Walt, I did have my mechs take the fuel system apart looking for plugs and have just started flying it again since I got it back from the annual. I won't see the fuel levels until the gauges reach 60 litres, but so far no more "sucking" sounds when I open the fuel caps. We'll see. I think that since I had the extra capacity bladder tanks installed the fuel imbalance seems greater because by the time the level reaches the fuel indicators, the imbalance actually IS exacerbated. I can't tell you how much fun I've been having with this extrordinary airplane. As to Dennis Savarese, I spent several days freezing in my hanger here in SLC while he was good enough to help me through his M14P engine course a year ago. I'd thump my chest and snarl on his behalf too, but my testosterone levels are a bit low today. All I can say is that I'm sorry for this Marines misplaced hostility on his friends behalf, but he needs to recognize, as previously stated, that Dennis is not the enemy. Worst case scenario, he was a victim and caught in the middle as well. If anyone would agonize over middle-manning a deal gone bad for a customer, it would be "Da Godfather of the M14P". To Semper Fi", read Sun Tsu's Art of War. You should be ashamed of yourself. I'd bet my Black Belt on it (and you don't want your butt kicked by a girl). Valkyrie


    Message 2


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    Time: 09:13:57 AM PST US
    From: Brian Lloyd <brian-1927@lloyd.com>
    Subject: Re: CJ Aux FuelCJ Aux FuelCJ Aux FuelCJ Aux Fuel
    On Mar 31, 2008, at 8:25 AM, Forrest Johnson wrote: > Do you have the tanks from Gill and Blackwell? If so the vent inlet > has one way check valve in it to maintain a very small constant > pressure created by ram air thru the vent system. Is there a reason for that? Seems to me that the system is under pressure when the aircraft is flying due to pickup of high pressure on the belly. Did they mention a reason for wanting to trap higher- pressure in the fuel system when the aircraft isn't flying? I am always wary of check valves as they have an annoying habit of occasionally sticking closed. This strikes me as an undesirable characteristic in the fuel vent system. ;-) -- Brian Lloyd 3191 Western Drive brian HYPHEN 1927 AT lloyd DOT com Cameron Park, CA 95682 +1.916.367.2131 (voice) +1.270.912.0788 (fax) I fly because it releases my mind from the tyranny of petty things . . . Antoine de Saint-Exupry PGP key ID: 12095C52A32A1B6C PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C


    Message 3


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    Time: 09:23:12 AM PST US
    From: "Elmar Hegenauer" <elmar.hegenauer@telus.net>
    Subject: gear collapse, no uplocks?
    I have a thought here.................. Some of the CJs (incl. mine) have no uplocks. The gear is solely kept in the wells by the air pressure in the actuators, what on the other hand puts quite some stress on the bolts, studs and brackets, especially doing aerobatics and pulling Gs. When I come out of a loop, I can see the red gear lights going out and the air pressure gauge needle climbing up until the pressure relief valve kicks in. cheers Elmar


    Message 4


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    Time: 03:52:11 PM PST US
    From: "doug sapp" <dougsappllc@gmail.com>
    Subject: V530 spinner
    Anyone out there have a Yak 18T type (big) fiberglass spinner for a V530 which is surplus to their needs please give me a call @ 509-826-4610. -- Always Yakin, Doug Sapp Phone 509-826-4610 Fax 509-826-3644


    Message 5


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    Time: 04:12:39 PM PST US
    Subject: V530 spinner
    From: "Dee Conger" <dee@innoviveinc.com>
    Hi Doug - I might have one for you - what price are you looking for? From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of doug sapp Sent: Monday, March 31, 2008 3:45 PM Subject: Yak-List: V530 spinner Anyone out there have a Yak 18T type (big) fiberglass spinner for a V530 which is surplus to their needs please give me a call @ 509-826-4610. -- Always Yakin, Doug Sapp Phone 509-826-4610 Fax 509-826-3644


    Message 6


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    Time: 04:13:57 PM PST US
    From: "jon blake" <jblake207@COMCAST.NET>
    Subject: gear collapse, no uplocks?
    I leave my gear handle in the "UP" position during flight. I've been told to move to neutral. Does it matter? Respectfully, Jon Blake -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Elmar Hegenauer Sent: Monday, March 31, 2008 10:20 AM Subject: Yak-List: gear collapse, no uplocks? I have a thought here.................. Some of the CJs (incl. mine) have no uplocks. The gear is solely kept in the wells by the air pressure in the actuators, what on the other hand puts quite some stress on the bolts, studs and brackets, especially doing aerobatics and pulling Gs. When I come out of a loop, I can see the red gear lights going out and the air pressure gauge needle climbing up until the pressure relief valve kicks in. cheers Elmar


    Message 7


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    Time: 04:21:16 PM PST US
    From: "doug sapp" <dougsappllc@gmail.com>
    Subject: Re: V530 spinner
    Dee, I have been paying $700 each (+ship) for them new out of Russia, that's complete with backing plate and all hardware. Tell me about yours. On Mon, Mar 31, 2008 at 4:00 PM, Dee Conger <dee@innoviveinc.com> wrote: > Hi Doug ' I might have one for you ' what price are you looking for? > > > *From:* owner-yak-list-server@matronics.com [mailto: > owner-yak-list-server@matronics.com] *On Behalf Of *doug sapp > *Sent:* Monday, March 31, 2008 3:45 PM > *To:* yak-list@matronics.com > *Subject:* Yak-List: V530 spinner > > > Anyone out there have a Yak 18T type (big) fiberglass spinner for a V530 > which is surplus to their needs please give me a call @ 509-826-4610. > > -- > Always Yakin, > Doug Sapp > Phone 509-826-4610 > Fax 509-826-3644 > > * * > > * * > > ** > > ** > > ** > > ** > > ** > > ** > > *http://www.matronics.com/Navigator?Yak-List* > > ** > > ** > > ** > > *http://forums.matronics.com* > > ** > > ** > > ** > > ** > > *http://www.matronics.com/contribution* > > ** > > * * > > * > =========== =========== =========== =========== > * > > -- Always Yakin, Doug Sapp Phone 509-826-4610 Fax 509-826-3644


    Message 8


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    Time: 04:44:22 PM PST US
    From: "A. Dennis Savarese" <adsavarese@hotmail.com>
    Subject: Re: gear collapse, no uplocks?
    FWIW Jon, depressurizing the landing gear actuators by putting the gear handle in neutral can cause the gear to slam when placing the gear handle into the down position. The reason being; you are depressurizing the actuators. With no pressure in the actuators, there is no "shock absorption" from the air escaping in the actuator when the gear handle is placed in neutral. As the air pressure is applied to one side of the actuator, the other side is depressurizing. Thus, the shock absorption. With no uplocks and the gear handle in neutral, the gear will have the opportunity move freely with g-loads. The only way to prevent the gear from slamming after the gear handle is put in the neutral position is to move the gear handle back to the previous position. Then move the gear handle to the down position and the gear will not slam down. Test this the next time you have the airplane on jacks. Raise the landing gear. Then put the gear handle in neutral. After the air exhausts, put the gear handle down. The landing gear will slam into position. Then try it with not putting the handle in neutral. ie: leave the gear handle in the up position. Move the handle down and see how smoothly the gear goes into the down and locked position. One last comment. You will use more air from the main air tank when you depressurize the actuators by moving the gear handle to neutral. Dennis ----- Original Message ----- From: jon blake To: yak-list@matronics.com Sent: Monday, March 31, 2008 6:07 PM Subject: RE: Yak-List: gear collapse, no uplocks? I leave my gear handle in the "UP" position during flight. I've been told to move to neutral. Does it matter? Respectfully, Jon Blake -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Elmar Hegenauer Sent: Monday, March 31, 2008 10:20 AM To: yak-list@matronics.com Subject: Yak-List: gear collapse, no uplocks? I have a thought here.................. Some of the CJs (incl. mine) have no uplocks. The gear is solely kept in the wells by the air pressure in the actuators, what on the other hand puts quite some stress on the bolts, studs and brackets, especially doing aerobatics and pulling Gs. When I come out of a loop, I can see the red gear lights going out and the air pressure gauge needle climbing up until the pressure relief valve kicks in. cheers Elmar - The Yak-List Email Forum - --> http://www.matronics.com/Navigator?Yak-List - MATRONICS WEB FORUMS - --> http://forums.matronics.com - List Contribution Web Site - Thank you for your generous support! -Matt Dralle, List Admin. --> http://www.matronics.com/contribution


    Message 9


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    Time: 07:22:02 PM PST US
    From: Walter Lannon <wlannon@persona.ca>
    Subject: Re: gear collapse, no uplocks?
    Dennis, et al; I have no knowledge of the Yak gear procedure. The manual procedure for the CJ specifies the lever to neutral after retraction. The first step in extending the gear is "Gear Lever UP" for the reasons you have noted and is included on the cockpit placards I supply. The 50/52 and the CJ main gear are totally different and cannot be compared in operation. Having said all that, I expect that many CJ pilots do not use the neutral position (including yours truly most of the time!) and there are a number of CJ's with no uplocks so pressure on these must be maintained. Uplocks were removed for at time by the PLAAF (though perhaps only individual bases) during the 1970's, probably in response to uplock release failure. No one seems to know the whole story. Moving the gear lever to neutral with the gear UP would certainly remove all the load from the adaptor fitting ( item that failed on Blitz's aircraft). Otherwise that fitting will be under continuous pressure since the actuator, in the extended position, is, by design, 3mm short of it's fully extended position. In the DOWN position, assuming that the overcenter and the gap between the overcenter stop faces are correctly adjusted, the adaptor is also unloaded. In this case the actuator is fully retracted and the ball lock engaged. The proper gap setting ensures that the ball lock is not restricted from engagement and the adaptor fitting carries no load. What all this seems to imply is that there is a reason for the "lever neutral" procedure. Maybe also explains why the factory hard chrome process on this part is apparently inadequate for a highly loaded item. The only load it would carry is the weight of the gear during transit. Cheers; Walt ----- Original Message ----- From: A. Dennis Savarese To: yak-list@matronics.com Sent: Monday, March 31, 2008 4:35 PM Subject: Re: Yak-List: gear collapse, no uplocks? FWIW Jon, depressurizing the landing gear actuators by putting the gear handle in neutral can cause the gear to slam when placing the gear handle into the down position. The reason being; you are depressurizing the actuators. With no pressure in the actuators, there is no "shock absorption" from the air escaping in the actuator when the gear handle is placed in neutral. As the air pressure is applied to one side of the actuator, the other side is depressurizing. Thus, the shock absorption. With no uplocks and the gear handle in neutral, the gear will have the opportunity move freely with g-loads. The only way to prevent the gear from slamming after the gear handle is put in the neutral position is to move the gear handle back to the previous position. Then move the gear handle to the down position and the gear will not slam down. Test this the next time you have the airplane on jacks. Raise the landing gear. Then put the gear handle in neutral. After the air exhausts, put the gear handle down. The landing gear will slam into position. Then try it with not putting the handle in neutral. ie: leave the gear handle in the up position. Move the handle down and see how smoothly the gear goes into the down and locked position. One last comment. You will use more air from the main air tank when you depressurize the actuators by moving the gear handle to neutral. Dennis ----- Original Message ----- From: jon blake To: yak-list@matronics.com Sent: Monday, March 31, 2008 6:07 PM Subject: RE: Yak-List: gear collapse, no uplocks? I leave my gear handle in the "UP" position during flight. I've been told to move to neutral. Does it matter? Respectfully, Jon Blake -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Elmar Hegenauer Sent: Monday, March 31, 2008 10:20 AM To: yak-list@matronics.com Subject: Yak-List: gear collapse, no uplocks? I have a thought here.................. Some of the CJs (incl. mine) have no uplocks. The gear is solely kept in the wells by the air pressure in the actuators, what on the other hand puts quite some stress on the bolts, studs and brackets, especially doing aerobatics and pulling Gs. When I come out of a loop, I can see the red gear lights going out and the air pressure gauge needle climbing up until the pressure relief valve kicks in. cheers Elmar - The Yak-List Email Forum - --> http://www.matronicscom/Navigator?Yak-List - MATRONICS WEB FORUMS - --> http://forums.matronics.com - List Contribution Web Site - Thank you for your generous support! -Matt Dralle, List Admin. --> http://www.matronics.com/contribution href="http://www.matronics.com/Navigator?Yak-List">http://www.matronicscom/Navigator?Yak-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c


    Message 10


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    Time: 08:21:43 PM PST US
    From: Larry <threein60@yahoo.com>
    Subject: V530 spinner
    RGVlLA0KVGhpcyBpcyBsYXJyeSBhdCBmZnouICBXaGF0IGFyZSB5b3UgYXNraW5nIGZvciB0aGUg c3Bpbm5lciQNCgoKLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0KRnJvbTogRGVlIENvbmdlciA8 ZGVlQGlubm92aXZlaW5jLmNvbT4NClNlbnQ6IE1vbmRheSwgTWFyY2ggMzEsIDIwMDggMTY6MDAN ClRvOiB5YWstbGlzdEBtYXRyb25pY3MuY29tDQpTdWJqZWN0OiBSRTogWWFrLUxpc3Q6IFY1MzAg c3Bpbm5lcg0KDQpIaSBEb3VnIJYgSSBtaWdodCBoYXZlIG9uZSBmb3IgeW91IJYgd2hhdCBwcmlj ZSBhcmUgeW91IGxvb2tpbmcgZm9yPw0KoA0KRnJvbTogb3duZXIteWFrLWxpc3Qtc2VydmVyQG1h dHJvbmljcy5jb20gW21haWx0bzpvd25lci15YWstbGlzdC1zZXJ2ZXJAbWF0cm9uaWNzLmNvbV0g T24gQmVoYWxmIE9mIGRvdWcgc2FwcA0KIFNlbnQ6IE1vbmRheSwgTWFyY2ggMzEsIDIwMDggMzo0 NSBQTQ0KIFRvOiB5YWstbGlzdEBtYXRyb25pY3MuY29tDQogU3ViamVjdDogWWFrLUxpc3Q6IFY1 MzAgc3Bpbm5lcg0KoA0KQW55b25lIG91dCB0aGVyZSBoYXZlIGGgWWFrIDE4VCB0eXBlIChiaWcp IGZpYmVyZ2xhc3Mgc3Bpbm5lciBmb3IgYSBWNTMwIHdoaWNoIGlzIHN1cnBsdXMgdG8gdGhlaXIg bmVlZHMgcGxlYXNlIGdpdmUgbWUgYSBjYWxsIEAgNTA5LTgyNi00NjEwLg0KDQogLS0NCiBBbHdh eXMgWWFraW4sDQogRG91ZyBTYXBwDQogUGhvbmUgNTA5LTgyNi00NjEwDQogRmF4IDUwOS04MjYt MzY0NCANCqANCqANCmh0dHA6Ly93d3cubWF0cm9uaWNzLmNvbS9OYXZpZ2F0b3I/WWFrLUxpc3QN Cmh0dHA6Ly9mb3J1bXMubWF0cm9uaWNzLmNvbQ0KaHR0cDovL3d3dy5tYXRyb25pY3MuY29tL2Nv bnRyaWJ1dGlvbg0KoA0KCgpfLT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PQpfLT0gICAgICAgICAgLSBUaGUgWWFrLUxpc3QgRW1haWwg Rm9ydW0gLQpfLT0gVXNlIHRoZSBNYXRyb25pY3MgTGlzdCBGZWF0dXJlcyBOYXZpZ2F0b3IgdG8g YnJvd3NlCl8tPSB0aGUgbWFueSBMaXN0IHV0aWxpdGllcyBzdWNoIGFzIExpc3QgVW4vU3Vic2Ny aXB0aW9uLApfLT0gQXJjaGl2ZSBTZWFyY2ggJiBEb3dubG9hZCwgNy1EYXkgQnJvd3NlLCBDaGF0 LCBGQVEsCl8tPSBQaG90b3NoYXJlLCBhbmQgbXVjaCBtdWNoIG1vcmU6Cl8tPSAgIC0tPiBodHRw Oi8vd3d3Lm1hdHJvbmljcy5jb20vTmF2aWdhdG9yP1lhay1MaXN0Cl8tPT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Cl8tPSAgICAgICAg ICAgICAgIC0gTUFUUk9OSUNTIFdFQiBGT1JVTVMgLQpfLT0gU2FtZSBncmVhdCBjb250ZW50IGFs c28gYXZhaWxhYmxlIHZpYSB0aGUgV2ViIEZvcnVtcyEKXy09ICAgLS0+IGh0dHA6Ly9mb3J1bXMu bWF0cm9uaWNzLmNvbQpfLT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PQpfLT0gICAgICAgICAgICAgLSBMaXN0IENvbnRyaWJ1dGlvbiBX ZWIgU2l0ZSAtCl8tPSAgVGhhbmsgeW91IGZvciB5b3VyIGdlbmVyb3VzIHN1cHBvcnQhCl8tPSAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgIC1NYXR0IERyYWxsZSwgTGlzdCBBZG1pbi4KXy09 ICAgLS0+IGh0dHA6Ly93d3cubWF0cm9uaWNzLmNvbS9jb250cmlidXRpb24KXy09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KCg=


    Message 11


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    Time: 08:32:15 PM PST US
    From: ByronMFox@aol.com
    Subject: Re: gear collapse, no uplocks?
    In a message dated 3/31/08 7:23:21 PM, wlannon@persona.ca writes: > Moving the gear lever to neutral with the gear UP would certainly remove > all the load from the adaptor fitting ( item that failed on Blitz's aircraft). > Otherwise that fitting will be under continuous pressure since the actuator, > in the extended position, is, by design, 3mm short of it's fully extended > position. > Interesting observation, Walt. Because my CJ has uplocks, I routinely placed the gear handle in the neutral after raising the gear for the first four years I owned the plane. For the last two years, however, I've just left it in the up position based on the recommendation of older and wiser CJ heads. Hmmm..... ...Blitz Fox ************** Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15&amp; ncid=aolhom00030000000001)


    Message 12


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    Time: 09:23:26 PM PST US
    From: Walter Lannon <wlannon@persona.ca>
    Subject: Re: gear collapse, no uplocks?
    ----- Original Message ----- From: ByronMFox@aol.com To: yak-list@matronics.com Sent: Monday, March 31, 2008 8:29 PM Subject: Re: Yak-List: gear collapse, no uplocks? In a message dated 3/31/08 7:23:21 PM, wlannon@persona.ca writes: Moving the gear lever to neutral with the gear UP would certainly remove all the load from the adaptor fitting ( item that failed on Blitz's aircraft). Otherwise that fitting will be under continuous pressure since the actuator, in the extended position, is, by design, 3mm short of it's fully extended position. Interesting observation, Walt. Because my CJ has uplocks, I routinely placed the gear handle in the neutral after raising the gear for the first four years I owned the plane. For the last two years, however, I've just left it in the up position based on the recommendation of older and wiser CJ heads. Hmmm..... ...Blitz Fox Hmmm is right. Two years operation is not much. I know of two CJ's with no up-locks in service for the past 12 years or so with no problem to date. I'm sure there are many others. Would be interesting to view the fracture surfaces, locate the origin and maybe get some idea of progression. Walt ************** Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15&ncid=aolhom00030000000001)




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