RFguy

I do not think so. . It is really important the GPS antenna gets mounted with an unobstructed view of the whole sky

what's up and what is down ???. I presume that's your ADSB transmit antenna, underneath the empanage.

Pretty good result really .....can be happy about that. Lived to tell the tale. But why did it stop? Being on top of the maintenance of my Archer I feel it's only going to ever stop if the the pilot messed up (fuel selection, fuel monitoring ) , or something got missed in maintenance. Lycomings and Pipers dont just stop randomly. Everything that breaks or wears out is absolutely known. glen

Red said : "You simply need to connect any GPS Source that has NMEA out capability to the XPDR, its one wire and a ground" NO ! You must use a TSO certified GPS. You are not permitted to use "Any GPS" Burnie's post is correct"https://www.recreationalflying.com/forums/topic/39965-transponder-adsb/?do=findComment&comment=568941&_rid=11148" AND - the location of the GPS antenna must fall inside zones spelt out in on of the advisory circulars. basically between the cabin and the tail fin.

Nev, I see lots of GA people AMS, LAMEs running engines without cowls well above runup speed and I voice my opinion... People just dont realise that the air must go between the fins, and will ONLY do so if there is no other choice. Blowing air across the tips of the fins (open cowls) is almost useless compared to the actual airflow requirement...

Hi Mike, nice writeup. Carbon forged ? what is carbon forged ? Be careful of ground running. You need more than air directed down at the fins, you need air forced through them. Given ANY opportunity to go around the fins, air will. (WHich is why Jabiru head cooling is so bollocks) . Needs full baffles. be sure to have CHT probes hooked up before running... and keep ur eyes on them !

I'm thinking of running for the board. The RAAUS office is 2km from the factory.... it's this time of year isnt it, might be too late.

north canberra (Kaleen) to cowra 1.9 hours. 180km door to door, 2 sets of traffic lights.... I have accomodation up there and a workshop, so that makes life easier. I always leave at 0600 each way. roos are not too bad right now with plenty of non roadside food to eat.

maybe, I cant remember , it was a while back. apart from difficulties users had with the airport operator, the lack of ownship and investment- IE at cowra and temora, the rates from the new hangars / land sales offset maintenance costs, leading to a well maintained facilities, and less of a transient nature. for cowra - There's also many businesses that run out of it- maintenance facilities, ag facilities and a big flying school. There are a few other issues not easily sorted- The weather is in general not all that aviation friendly - hot and high in the summer, and eternal fogs in the winter, and substantial crosswinds on the main. The place is a mess also. no investment by anybody. littel ground upkeep. This is all pretty much seen as the symptoms of the operator and the relationship to the users. If the council had maintained ownership, they could have done a subdivision. I think it is unlikely people would buy land in a subdivision from the current operator. However, despite the problems, I think it would be an option for canberra/ regional people. The cross grass runway could be improved and extended another 300m, otherwise(very) light aircraft face regular uncomfortable crosswinds. A power line could be relocated If I was flying out of there regularly, (I use my plane to go places and I need to be there when I say I will) an instrument rating would be a must.

ideally, in the perfect world, the sense wire would also have a fuse (say 1 or 2 amps) to the battery IE anything directly connected to the battery (and not able to be disconnected) must be fused at the wire rating.

I have seen a document produced for the council (on request) by a development consultant - helping then understand why cowra and temora had been development successes for those councils, and why GLB had been pretty much the worse example in the state. doco is about 4 years old ....

heard from anyone actually at Goulburn airport , or associated with the council ? glen

Hi Kevin I dont know about a new new Jab regulator, just incantations of the Kubota, or $40 ebay copies ? . 14.7 is too high. Do you have the sense wire going to the battery directly ? Those crimps are not much good above 10 amps. Unsurprising you have a bad one. I would suggest a 25A amp blade fuse in series with the stator. Suggest on both wires (two fuses) BTW am keeping my jab. I will have a new jab regulator for sale in a couple of months... just moving my factory, it will able to be purchased from my web shop.... - can deal with flat lithium batteries (with current limit) - can provide charge from 600 rpm up - won't blow up and put the battery across the alternator stator cooking the stator.... - crimp ring terminal screw down connections

however some puzzles : What I also saw was higher than usual, for a given fuel flow , was slightly high (20F) EGT (single EGT readout) , (leaned to peak EGT at 65% power) ....despite the negative OATs. - As usual , no difference on AVGAS or 98ULP. ...have a single EGT readout. My 1st guess is that in these conditions, one or more cylinders were going too lean (before engine stumble) later IE , during the process of leaning for peak EGT / engine stumble, the monitored cylinder EGT got leaner (and hotter) than ever before when perhaps other cylinders were later getting leaner than usual, hence reading a overall leaner mixture onm the monitored EGT before stumble. Usually, the monitored EGT cylinder when it just goes a touch beyond peak EGT, the engine stumbles. Useful reason to have EGTs on all cylinders. Useful for troubleshooting/depuzzling the puzzle.

anyone finding that with all this high pressure and low temperatures, they are needing more right pedal on TO climb that they usually do ? I am ! Cowra was 1000' below sea level yesterday mid morning..... (instead of 1000' above)

Both Goulburn and crookwell have challenging weather. I was considering moving to goulburn but I decided the weather was too foggy too often (compared to cowra where fogs are the exception rather than the rule) . In summer at Crookwell, with an easterly, you better have done your numbers if the grass is between mowing.. Goulburn at best $3mil. the strip and need need work.

Brendan, yeah there are quite a few parts on the PCB to do this, but the incremental cost of parts on a PCB being machine placed is very low. There are two ways of doing it, You either make every terminal capable of any function, and route using transistors to the 'output' pins (IE the known interface like a connector for a Tig or garmin or whatever) , or a matrix crosspoint switcher of miniature relays is used- very reliable because the relays which are rated for millions of cycles only get a cycle every time the plane is powered up, it it might get 10,000 cycles in its life.... With the relay crosspoint switcher, it still needs to route the signals from some processing to get audio levels right , PTT etc levels translated . but its all low tech. While there's alot of parts on said board , its still cheaper and more so, probably shorter time than waiting for a rare avionics person to do it (properly) . The relay crosspoint switcher- if it needs to switch anything to anything needs Nsquared crosspoints(relays) . These are solid state relays, about 3mmx3mm and less than 30c each . The universal terminal method, where any terminal can function as a audio input, output, ptt, or ground, needs a bit more design finesse but probable more adaptable especially if you get up to 4 intercom places OR multiple AUX inputs ( multiple radios, efis warnings, ipod , etc) The user wires up every terminal (with impunity) and a fairly basic algorithm goes out and discovers what it is on the end of everywire. that's fairly simple electronics, there's just alot of it for alot of pins..... .probably worth a patent. Someone still has to make up a cable to go from the box to whatever the radio you are using is , but that's a straight through cable, nothing special, just pin to pin. It's possible that a standard (one for all) cable could be used out of the box to a radio and use a printed circuit board connector to plug directly into the radio, (the traces on the PCB are such for the radio) so there is NO non standard cables or wires. Said box would/could also function as a intercom etc, since it is doing signal processing and routing. -glen

comes from the demonstrated need for people to get their radios and intercoms fixed and installed, with very few competent to do it....

Hi Mike, thanks fore the offer, but my parts and stuff has to to stay in australia, I am a strong supporter of making stuff in australia, and wont entertain other possiblilities. So much so , EMily (partner) isnt 'allowed' to buy Italian pasta at the supermarket. over my dead body. I am not completely dormant though, just having a few frustrating moments..

Currently in my system I have a few aviation projects on the go. 1) I suspended the radio out of my schedule in March due to other commitments, and that I was feeling a bit of feature creep, and this was turning it from a simple radio into to a complex design with multiple parts, and such things cost alot of time and this isnt a high value product. So this week I've got back to it and cut it down a bit- UHF CB is now not simultaneous (you can switch to it) - it was putting too many screws and complexity on the aviation band design to have it do both simultaneously and stay simple. also, I wont have it receiving ADSB anymore, more stuff too complex,. if this is going to get out the door, it needs to be more basic- still has the 4 simultaneous receivers and 10W TX /1W switchable TX power radio, and intercom etc. Also, I was planning to use an existing radio platform I have which is a bit too big to fit into a small panel hole, like Trig, Microair etc, so I was going to run it as two boxes. But two boxes (panel and main unit together with cables, connectors, extra microprocessor for the panel display ) is another complexity , so that goes. which has meant going smaller on the PCB. The upshot of that is that this triggers a design overhaul and it will now all go into a panel hole, which simplifies everything. So, on with that show ! 2) "anywire interface" . there's a big problem with getting a new radio/intercom installed these days, is gettign someone to do it.... maybe we can skip that problem----. It is quite feasible to make a box that you connect every wire, but it doesnt matter what wire is what, IE you just connect the wires in no order and the box figures it out for connection to radios on a standard harness for that radio. IE doesnt matter where you connect grounds, mic, ptts etc nothing. 3) I'm making some Jabiru targeted alternator regulators. the big plus, they'll generate useful charge from 600 RPM upwards, instead of 1500 RPM. and they wont overcharge batteries etc, and can be told about the chemistry. They will run warm instead of red hot (at full load) , and will have no chance of going short (which generates a stator fire) .... 4) Collision warning/ aircraft proximity warning. I built one. Has triple GPS and triple barometer so it doesnt care if it has a poor view of the sky- (skyecho can generate up to 300m error if it doesnt get a good view of the sky. . has basic adsb receiver also. apart from an audio output (into aux, or a mixing port so it can go in series with the intercom/ headset with failsafe relay bypass) , the $64 question is how do you display it ? Do you send it out like the skyecho talkes to the tablet, or have some custom screen ? anyway, that's what is cooking. glen

yeah recession - that would have been picked up if done every 25 hours but maybe the loss of compression was marginal so was not investigated I don't know. It takes very little pressure loss of the valve against the seat to completely kill the heat transfer.... the older exhaust valves have a definite life, also. chuck them at 500 hours I say. newer jab valves are much more heat hardy - different material..... (and they're also 3x the price), so its possible the valve just saw too many tension x temperature cycles. I am guessing for a 912 to fail, with valves < 2000h, that indicates an abused engine.

It is consumer grade, My guess is the BoM and MFR cost together is less than A$150. I've already fixed a bad solder joint in mine. Although mine has been dropped from a meter onto a wooden floor (not good for it) . that's the other problem with portable electronics, they get dropped and they're not built to survive that sort of thing .... So, there are good reasons to have fixed equipment. I wouldnt do a portable version for same reason- critical devices getting mishandled. My cost structures dont lend themselves to this sort of thing, my capable volumes are too low, there is only me, there's a limit to what I can do. Australia is hard. insufficient labour, relatively high labour costs, and no tax incentives from being outside the big cities, and the need to be in cities to get services and facilities you need for sophisticated manufacturing (unless you have it all inhouse) .... Part of me is half giving up on mfr in australia. I need scale, and I dont have deep enough pockets to get scale.

quite alot of recession visible, this head has been overheated for some time. I wonder if it was a hydraulic lifter that ran out of adjustment length (due to recession and jabiru factory supplying wrong pushrods from the factory and not telling anyone) , and thus the valve never closes properly, hangs open and overheats .......

SKyecho devices are built super cheap ! It's quite obvious that there is a real cost drive in production by looking at the insides with a microscope. absolutely lowest cost production.... do not be surprised when they stop.

"I've decided to grab the GTX 345 with an Aera 660 to act as my GPS/traffic monitor. I was wondering how much is 345" deciding before knowing the cost ? I'd suggest a GTX335 for the 200W ADSB output and continue to use a skyecho for traffic-in talking to a tablet machine for displaying traffic. You want a large screen for displaying traffic, and one that can be zoomed. You'll spend $29,000 getting an equivalent garmin screen on a EFIS etc Suggest a GTX335 with GAE12 encoder . be sure the GTX335 has the internal GPS option, otherwise it expects to get GPS from some other garmin