---------------------------------------------------------- L29-List Digest Archive --- Total Messages Posted Mon 10/18/10: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:30 AM - Re: tires (SD737@aol.com) 2. 07:51 AM - Re: L29 air system mod (delfin) 3. 12:45 PM - Re: tires (Bill Geipel) ________________________________ Message 1 _____________________________________ Time: 07:30:38 AM PST US From: SD737@aol.com Subject: Re: L29-List: tires Doesn't Desser Tire in the USA make new tires for the L-29? ________________________________ Message 2 _____________________________________ Time: 07:51:25 AM PST US From: delfin Subject: Re: L29-List: L29 air system mod =0A-=0AWhat type of high pressure- shut off valve is used. Must be reli albe to avoid =0Aleaking=0A=0A=0A=0A________________________________=0AFrom : Jorgen Nielsen =0ATo: l29-list@matronics.com =0ASent: Sun, October 17, 2010 4:04:38 PM=0ASubject: L29-List: L29 air syst em mod=0A=0A=0ABeen some discussion around the air system - Jean shared his compressor =0Amodification which is great.=0A-=0AFor those wanting to do the same, one could use an old Cornelius compressor - =0Aits a 3 stage dri ven by an 24V electric motor.- People used to buy them surplus =0Aand rig up homebrew compressors, some googling should reveal more.=0A-=0AFrom a ground handling perspective the Achilles heel of the L29 is the air =0Asyst em - if you flying away somewhere, its necessary to send air ahead by road, =0Aor arrange air at the destination - either scuba air or Nitrogen, both work =0Aperfect.- I have done this!=0A-=0ATo get around this, I also ca me up with an idea and made a modification which =0Ahas worked trouble free now for 3 years.=0A-=0AI never fly above 20,000ft so do not need oxygen. - I therefore replaced the =0Aoxygen tanks with additional "normal" tanks .- Lets call the standard system the =0A"A" tanks, and the additional set the "B" tanks.- Each set- of tanks has a shut =0Aoff valve which then goes into a t-fitting - the middle of which feeds the =0Aaircraft air syste m.- So one or both valves has to be open for flight.- =0AOperation is s imple - if its a local flight open say the "A" system valve, check =0Apress ure, add air if required and fly.- After the flight, close the valve.- All =0Athe air stays in the tank as there are no losses downstream. -=0A -=0AFor away flights, I open both valves, fill up the system, close off s ay the "B" =0Asystem, and fly.- On landing, I shut off the valve.- I ca n then leave the =0Aaircraft, knowing that when I return it has not lost an y air.- I can fly several =0Asorties, all on the first "A" set of tanks. - And I still have a full set of "B" =0Atanks.- So when the first set g ets low on pressure, I simply use the other set.=0A-=0AIt works great.- I made one away trip about 2 months back where I flew to =0Adestination, f lew 3 sorties, and flew back, several days later.- And still had =0Alots of air.=0A-=0AThe other great thing about this mod is that the standard s ystem has 8l of air, =0Athe secondary system has 12l.- So the mod takes t he air carried on board from 8l =0Ato 20l in total ( or to be precise from 1200l to 3000l at 150 bar) , and the =0Aability to shut off the tanks means no lost air when on the ground. =0A=0A-=0AYou have to remember to open a set of tanks before flight - I preflight in the =0Anormal way, and open th e air system then check in the rear cockpit that not only =0Athe main air s ystem is ok, but also the backup air.- After start, my final =0Apre-taxi check is the pneumatic pressure - I then roll forward and check brakes, =0A and re-check pneumatic pressure.- There should be no change.- If you op en the =0Aair, then close it again, the gauge will drop about 20-30 bar fro m one brake =0Aapplication.=0A-=0ARegards Jorgen=0A-=0A-=0A-=0A- ================ =0A=0A=0A=0A ________________________________ Message 3 _____________________________________ Time: 12:45:57 PM PST US From: "Bill Geipel" Subject: Re: L29-List: tires I called and they said no. They also said they would recap them but haven't done that either. We sent them some but they hadn't done it yet. ----- Original Message ----- From: SD737@aol.com To: l29-list@matronics.com Sent: Monday, October 18, 2010 9:26 AM Subject: Re: L29-List: tires Doesn't Desser Tire in the USA make new tires for the L-29? ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message l29-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/L29-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/l29-list Browse Digests http://www.matronics.com/digest/l29-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.