nlappos

Contributing Member
  • Content count

    272
  • Joined

  • Last visited


Everything posted by nlappos

  1. nlappos added a post in a topic Erghh... Online Sales Tax IS HERE!!   

    Just remember who insisted on it, and who you voted for.
    • 0
  2. nlappos added a post in a topic Sea Foam in wing tanks OK?   

    Sea Foam is unnecessary and nothing but flim flam. 
    • 0
  3. nlappos added a post in a topic VGs/ uncambered airfoils and drag   

    Yes, if the bank is fully trimmed with back stick so it develops the load factor. And no if you do not trim into a zero altitude loss turn.
    The better way to say it is that at 2 G's the stall speed increases by 40%.  1.4 x 1.4 = 1.96, so that the V squared portion of the lift equation is satisfied - same wing, twice the lift needs 1.4 times the airspeed.
    But if you just bank, and allow altitude loss, no problem and no stall speed increase.
    • 0
  4. nlappos added a post in a topic VGs/ uncambered airfoils and drag   

    Nice! And I love the music!
    • 0
  5. nlappos added a post in a topic New Rotax 670 Install   

    TJay, yes without cowlings a Jabiru will overheat because it is air cooled and the cowls guide the air over the cooling fins. A Rotax 2 stroke is water cooled, a whole different beast. 
    • 0
  6. nlappos added a post in a topic Size of bolts for flaperon hanger   

    Nope, those are R9, and that is the too-short bolt. I had the same gig on an annual 2 years ago and ordered the R10 from Aircraft Spruce, so the nice to have 2 threads will show. The R9 is 9/16" long the R10 is 5/8". I bought 22 of the AN526-632R10 and became a happy camper.
    • 1
  7. nlappos added a post in a topic New Rotax 670 Install   

    Serious ground runs today, and I installed the belly radiator that has been on my hangar shelf for 2 years. Yesterday I went to over temp 180 degrees in about 5 to 6 minutes of ground run (OAT 87 degrees, cowlings off). With the belly radiator I ran for 20 minutes today and the temp stabilized after about 12 minutes at 165 or so.
    To support the radiator, I used 2 U-Bolts thru the cockpit floor, hooking over the diagonals that go from the center aft to the sidewall. I put the bolt thru the plywood, below the carpet where it didn't interfere at all. I used a cut-away rectangular channel mounted to the U-bolts, and then bolted the radiator to the channel. The channel is about 2" in depth, pulling the radiator down a bit for cleaner air (yes, and more drag). Silicon tubing connected the radiator to the pump output, and the return goes to the right nose radiator.
    I set the warp drive to 15 degrees of pitch at the tip, and today ran to full throttle in the chocks, and got 5970 RPM, which is close enough for me to take it to flight. EGT and fuel flow are working fine, so I should get good performance data for the group.High speed taxi tomorrow, if the winds behave.



    • 0
  8. nlappos added a post in a topic New Rotax 670 Install   

    That is the 670 muffler and exhaust system made by Mike Hair and recommended by Ron Davis (Rotax Rick, who did the engine), it is bigger than the 582. I'll let you know how it works.
    • 2
  9. nlappos added a post in a topic New Rotax 670 Install   

    Yes, if it were just the engine, I'd agree, but the prop and the gear are also considered 'major changes". I called the FSDO, they said just log the changes, reenter phase 1 for 5 hours, then log the completion with the magic words. No inspection or paperwork.
    • 1
  10. nlappos added a post in a topic New Rotax 670 Install   

    Progress, finally (spent weeks and weeks on moving, retiring, traveling and such. Finally able to spend time on my MK IV)
    Tasks performed in the last few months:
    ·         Removed Rotax 582 type 99, Hours 191.5 S/N 7626516,                                                                                                

    ·         Installed Rotax 670 BH18,  engine S/N 4087049, Hours: 0.0

    ·         Rigged Bing 54 Carbs, new, installed Hacman mixture control, installed 170 Main Jet for 6000 feet

    ·         Installed 2 EGT sensors into exhaust Y duct, Installed new Facet 2-4 psi fuel pump on left firewall, wired through master switch, separate 5 amp fuse

    ·         Removed Oil tank, capped off engine tank inlet, bombed off oil mixing input cable from throttle to rt side engine mountOIL MUST BE MIXED IN GAS, 40:1

    ·         Installed Mike Hair custom 670 exhaust with new reinforced silicone hangers and safety cable, safetied and RTV'd springs

    ·         Installed new Warp Drive 68" tapered 3-bladed prop with HTL hub, set initial pitch to 15 degrees, torqued all bolts, safetied with lock nuts on inner flange

    ·         Cut cowling to fit new muffler, reinforced lower edge for strength

    ·         Removed factory bungee landing gear. Installed Highwing LLC bush gear, rebuilt hubs, lubed bearings, inspected brakes, installed longer brake lines, filled and bled brake system with 5606, checked wheel alignment and angles

    ·         Removed and installed RT wing, replaced wingtip Whelen strobe/nav lightsm Replaced strut hdwr

    ·         Replaced Tail Wheel spring with new double spring

    ·         Installed inspection panel on tail to access TW attach bolt and TW structure

    ·         Installed new cabin fuel lines and filter fm wing to header tank., Drained fuel system, flushed tanks.

    ·         Installed new (used) altitude encoder for Xpdr

    ·         Leveled and weighed aircraft, new weight and CG statement prepared.

    ·         Completed annual Condition Inspection Items, ready for A&P inspection

    ·         New engine, landing gear and prop constitute major changes, and require entering Phase I flight test for 5 hours, will make appropriate log entries.


    First ground runs yesterday and today, runs like a charm, smooth and sweet! Will report the performance and fuel consumption as I flight test it.
     



    • 0
  11. nlappos added a post in a topic HOw to bend the gear   

    Zadwit, how about all the broken tailwheel structure? It looks like it cracked the steel back there to sever the entire TW structure. I suspect your landing was very, very hard. Any idea of the G's on impact?
    • 0
  12. nlappos added a post in a topic Uh 60's   

    He couldn't post at first, I suggested Youtube. He did that, which is why we now see it. Nice job, wypaul! I have 2500 hours in Hawks!
    • 1
  13. nlappos added a post in a topic Uh 60's   

    wypaul, try putting it up on Youtube.com and just posting the link. Wed love to see it!
    • 0
  14. nlappos added a post in a topic Belite Chipper Down   

    Later report and an interview with Jim. He said the engine quit at 150 feet on final, and he landed just short of the runway, clipped a fence and flipped over.
     
    http://www.ktuu.com/content/news/Pilot-of-crashed-plane-thanks-Alaskans-for-help-483672651.html
    • 0
  15. nlappos added a post in a topic matco TW cam releases   

    I used the 25 degree wings, which matches the rudder rigging on an Avid. 45 will have difficulty releasing otherwise.
    • 0
  16. nlappos added a post in a topic What difference does pitch make?   

    Let's look at the propeller as a wing, and recognize that the wing makes lift (thrust) by a combination of angle of attack (pitch) and airspeed (RPM). f the two, the airspeed is more influential, since the lift equation used the velocity squared.
    At 5500 rpm the prop blade tip is moving at 740 feet per second (with a 2.43 reduction box), at 5800 rpm it is at 780 ft/sec. The difference i thrust is about 11%, assuming the engine was producing the same power. But with the engine producing 4 HP more power at 5800, that would make the prop thrust about 15% higher at 5800.
    • 2
  17. nlappos added a post in a topic Rotax 670 - 2 hrs TT   

    Single ignition.
    • 0
  18. nlappos added a post in a topic An Electronics "Must-Have"   

    Fear not, Mark. Because the item induces a dead short, it is actually either positive or negative ground, your choice!
    • 0
  19. nlappos added a post in a topic Removing Hysol   

    From my experience, Hysol is pretty soluble in MEK, as long as you can keep it away from the other stuff in the area.
    • 0
  20. nlappos added a post in a topic Can I get some Catalina and amphibian pics pls?   

    Barnstormers has one right now, 24K. I feel like buying it for my wife, as a gift.
    • 0
  21. nlappos added a post in a topic An Electronics "Must-Have"   

    Lucas! The Folks who invented darkness.
    • 0
  22. nlappos added a post in a topic Slow Glycol Loss - 582 Rotax Kitfox III   

    Radiator cap
    • 0
  23. nlappos added a post in a topic Compression numbers ?   

    Just to report to the group, my 582 Blue Head had 119 psi on each cylinder with 160 hours, and the next year had exactly the same reading (119 psi) with about 80 hours more time. These numbers were recorded with an electric starter.
    • 0
  24. nlappos added a post in a topic Leaning the carbs for altitude - on the cheap   

    The HACMAN leans the fuel mixture using the same method as the Rotax approved HAC system (which is illustrated in the Rotax parts manual in the accessories section), except the manual mixture valve. It basically tricks the carb bowl pressure to a lower pressure, making the carb deliver less gasoline to the metering valve (functionally the same as having a smaller main jet). I used a HACMAN on my 582 for 3 years, and it always produced clean plugs and high egts, as I flew from 11000 foot legs in Wyoming to sea level long cruises.
    I do think the simple mixing valve and tubing set is not worth $200 and I applaud the guys here who make it cheaper and simpler!
    • 0
  25. nlappos added a post in a topic Watch the plane crash   

    Poor trailer
    • 1