Emory Bored

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Posts posted by Emory Bored


  1. Hey Chris,

    So basically you just backfeed your charger using a male cigarette lighter plug pigtail from your charger, right? Also, any reason one of those lithium booster/starter packs should not be connected thru the 12v socket for emergency starts? Thanks 

    The size of the fuse in the line. If one needs to use the booster pack, I would connect it at the starter relay. 


  2. Hey Chris:

    I have the lead installed and I was about the hook it up when I realized that it definitely needs to be fused. So that's a good addition to the conversation. One would hate to burn his airplane down because the charge line insulation failed across a fuselage tube. I'll use an in-line fuse holder right at the battery location. 


  3. What does the common ground point tie to. Seems like ultimately it all ends up back to airframe. 

    Depends. In a glass airplane the battery negative will be terminated to a terminal block (buss) where multiple wires will be terminated. In a welded steel fuselage the negative side of the battery will be terminated at any convenient point on the fuselage near the battery and a ground buss will be located near the firewall also tied to the fuselage. 


  4. I think you guys got it. I don't know why I thought I'd have to run it outside or have a flush plug through the skin.  I can easily run a pair of wires through the baggage area and tie wrap to a tube inside. That'll do it. Thanks TJ and Joey.  

     

    Dan


  5. I need to put in an external plug to keep my battery topped up. It's a Rans S7LS but this is the smartest group on the net so I'm asking here. Fabric cover of course and the battery is in fuselage behind baggage compartment. I'm just not sure how to secure an input plug to the fuselage tubing. The easy out is of course to poke a hole in the fabric and dangle a wire out but that sucks really. There must be a more creative way. Any ideas?

     

    2-Way Connector Loop


  6. IMO, 1.25" axles are the way to go.  You can mount real wheels and brakes and get away from the toys currently being put on these planes.  There are plenty of wheel options available instead of the "chicken teeth" Douglass wheels and their associated shit brakes. 

    Moving to 1.25" axles and their associated parts was the single best modification I made to my plane. 

    Spring gear with big soft tires being the other.....:)


  7. Well I was issued my Airworthiness Cert on Jan 27 and I now have 4 hours on the bird. Today the wind was really ripping so I took advantage to see how slow it would it go. I hovered over the airfield with a groundspeed in the teens for about 20 minutes. Going downwind I opened it up and let it rip and I hit 126 mph groundspeed. I've never seen over 110 in my B model EVER even in a dive. Pretty impressive to see a 110 mph speed range on a 600 lb plane. I'm finally happy with my prop pitch so spinner goes back on next time I'm out. I'm ready to venture outside of the pattern with it as everything is working  really well and I'm gaining confidence in it every flight.

    I've got huge respect for builders like you who get things done.  There are two kinds of people in the world it seems, those who get things done and those who don't.  I fall into the latter class. 


  8. That looks suspiciously like a 4 stroke on that pallet mister.  

    For my private check ride I had about a hundred year old guy from the FAA as my examiner.  This was in the days before the feds contracted that work out to "super CFI" types.  We spent almost 2 hours just on the oral exam.  One of his questions that sticks in my mind went something like: "You are on a long cross country and someone damages your spinner while you are taking lunch. Can you remove the spinner and continue on your way home and then repair it?"  

    I said yes, I thought you could.  He then said WRONG and then showed me in the Piper Warrior operations manual mandatory equipment list that the spinner was listed.  It is required as a part of the cooling system. 

    Now, of course we are experimental so that's just not going to happen the same way but as others have pointed out, the spinner CAN BE part of the cooling system to direct flow through the cylinders.  Try it both ways. 

    By the way.  That check ride with him was almost all training.  He knew I could fly the airplane because he knew my instructor so we spent about an hour and a half doing commercial maneuvers, short approaches, cross wind landings, emergency descent technique through a hole in the overcast and other fun stuff.  He's gone West long ago but I'll always be grateful for the time I spent with him that day. 


  9. The backside is oxidizing.  You can use a twin regulator/flowmeter to back purge welds like that.  https://www.youtube.com/watch?v=-uoxKZtqXrA   If you dig around on Jody's site you'll find MUCH simpler purge chambers he's built.   I got a separate bottle of argon just for back purge on stainless.  

    Now, having said all that they used to pay me to mig and stick weld but I major suck at Tig.  For starters, I don't have a decent table to work from.  Every time I set up a weld it's just kind of half assed you know?  I need more practice. 


  10. Great job of course.  Terrific looking.  I ditto the same question as Fred on the USB outlets. Belite makes some but they seem awfully expensive for what they are.  I'm pretty sure that ignition noise can be filtered out with some combination of bypass caps.  

    I also have never used those motorsports gas cans.  Dumb question maybe but do they come with some sort of snorkel to guide the gas into the hole.  

    Everybody needs two airplanes right?  I need to get rid of two to make room for the Rans.  

    Again, happy for you man.  Way to go. 


  11. Wouldn't it be nice if we could buy an airplane and be done spending for awhile?  I've got tires & tubes, a better tailwheel and a propeller to buy.  Yikes!  

    Your DC headset is worth putting an ANR module in. 


  12. The weakness of the more economical headsets is in their wiring itself.  To a much lesser extent the overall construction.  The wires just seem to break at the plugs, at the grommets where they enter the cups or sometimes in the middle.  I used to cut off the knob on a ball cap to accommodate the hard rubber headband cushion but I think a guy might get creative about something cushier there too.  I never did do the ANR conversion but I've got 6 Softcomm sets in a box in the garage that would be excellent candidates.  They came with an airplane I bought once.  I'll probably convert one pair for the backseat of my S-7


  13. Good work.  Contractors most often put very little effort into that sort of thing but I think it will pay.  Though we've given up for now, a few months back we had decided to move 60 miles down the road into more open country and build.  In the end we never could find a piece of ground that wasn't covered with outlandish CCRs so we gave it up.  In looking for a builder we finally found one after cruising neighborhoods and peeking in windows.  They were retiring and taking no new work.  Others I could tell from a lifetime in electrical construction didn't measure up plumb you know?  The photos in our gallery would prompt negotiations thats for sure.  

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  14. That really is a fine looking airplane.  What is that raised lump on the port cowl?

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  15. Lightspeed Zulu 2. I am more or less profoundly deaf with expensive hearing aids.  They work very well with the Zulu 2 set.  I must admit though that the price was frightening.  If one is on a tighter budget there are other less expensive ones available.  I flew three 3.5hour legs one day with no discomfort at all.  That's saying something.  4 stroke engine.


  16. Thanks for the update - I was just about to ask.... 

    you mention 95 hp, what engine do you have? I’m currently using short 3 blade warp drive that worked well mith my old and tired 532 but don’t give what I expect from my 92hp Simonini.

    please keep posting your impressions and kool experience

    I'm just guessing Fred but I think that the 912ULS only transmits 95hp to the propeller.  

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  17. As far as my research on the scimitar shape, I found that it runs smoother and quieter, cruises very slightly more efficiently, and has better trans-sonic properties if you were to get the tip speed above .89 mach.  Downside is that it has a little less static pull.

    So I decided to go a little longer scimitar than I would have gone with a straight blade  (to regain lost thrust) that will turn with higher tip speeds... but it should be able to handle that better.

    Thanks. I choose thrust out of the hole I think.  Smooth is nice though.  Hard to tell.  At least with the Luga you can kind of afford to try both blade shapes on the same hub and whatnot. 

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  18. I've always wondered about the delivery motives on those aircraft.  If I ran the effort to equip Stalin with some airplanes it would make sense to me first to send all my very best pilots into combat in Europe and the Pacific.  Then, wanting to save as much money and time as possible I would build a string of airports at distances apart from each other that closely aligned with the range of the aircraft being ferried to Russia, then I would take those pilots that weren't especially fit for combat and put them in the cockpits of airplanes that I didn't particularly want and send them to their dooms over the top.  I imagine that that scenario is probably a factor; not the factor. 

    A careful read of any one of dozens of histories of command decisions during WWII will suggest a peculiar cold efficiency to their methods.  Also, all of those airplanes were widow makers.  The only ones the pilots (several of whom I knew personally) really liked were the P-51 and the F-6.  Corsairs, P-40s and many others were horrible beasts. The P-38 early was a death trap until they figured out counter rotating props to eliminate the critical engine.


  19. Av8r_Sed,

    I am checking with the Warp Drive folks. Some literature says ok, some says not (70" max for 3 blades). Thanks for the heads up.

    Warp Drive wants to sell you a prop.  They are not the people to check on this with. 

    If you don't believe us, call LEAF, Lockwood or CPS to get accurate information on your Rotax gearbox.

    Agree.  Bad prop for the C and when used on the 912 they will tear up the sprag clutch too.  They sure are easy to repair and maintain though.  Lot's of thrust too.  Good prop on a belt drive PSRU. 


  20. That 'box goes along with you guys looking for more and more horsepower from your 2-strokes...

     

     

     

    I installed a pair of quad turbo 16V149s running 750KW emergency power generators at O'Connor Hospital in San Jose in about 1978 if memory serves.  Both units were on skids and designed with "point of connection" terminals for control and output on the units.  Others piped fuel and coolant to the skids.  Transfer switches were located remotely in the basement of the hospital.  As I recall, it took about a year, start to finish to set them and hook everything up. It was a good job. They made lots of noise when fired up.