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Touring Motor Gliders Association (TMGA)

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  1. Last week
  2. HiFlite

    (Electric) Tailwheel tug solution?

    The next size up, T1V2, works well. Easy Peasy ...
  3. Burke Stafford

    Grob 109A Parts

    I have a Grob fuselage w/engine and Hoffman electric prop for sale. Please email me with inquiries as to what you are looking for. I can remove and ship any parts needed, or I would ideally sell the whole thing.
  4. Burke Stafford

  5. Eric Greenwell

    Most Excellent Wave Flight by Jim Lee

    I looked into the idling question several years ago, and concluded the harm to the engine was very minor at worst. I do keep the oil temperature at 190F while idling; the CHT temperatures also stay in the mid-range. I'd prefer to shut the engine off (it does glide better), but since I don't want to attempt a restart without being in gliding range of an airport, our typical weather and airport situation means I'm frequently heading to an airport to do a restart. It really diminishes the joy soaring, when a lot of the time is spent that way, so I've chosen to enjoy the soaring more and accept th
  6. Earlier
  7. Jim Lee

    Most Excellent Wave Flight by Jim Lee

    Eric, running any engine at idle is typically bad for the engine, with carbon buildups, fouling, incomplete combustion, and water not being burned off in the oil. You should get a large battery and not be afraid to shut down the engine. If you must run at idle, be sure to keep the oil temp as high as possible, 190 degrees will do it. Your landing technique is fine. However, for really challenging conditions with strong winds such as found in wave conditions, some things need to change. The less spoiler that is used, the lower the stall speed. In ground effect with less than 1/3 spoil
  8. benettlr

    Tailwheel Replacement

    Steve, 1) The stock wheel is a bear to work with. In my experience, the key is to first support the wheel via a dummy axle post (secured rigidly in a workshop vise) and work one tire bead onto the wheel; then work the tube into the tire, then mechanically clamp (i.e. squeeze without pinching the tube) one sector of the tire together so that both tire beads can be worked together down into the "valley" at the mid-plane of the wheel, and then work the remainder of the second bead onto the tire. Talcum powder does help. Liquid soap can also be used, but expect a mess. It's hard enough to do
  9. Eric Greenwell

    Most Excellent Wave Flight by Jim Lee

    I only tape the wing root and tail junctions, just because there is so much stuff hanging out, I imagine the taping improvement is tiny, but I've never tried to measure the improvement. I usually leave the engine running in winter wave, as it seems be some heat from it leaks in, even though it's idling at about at only 2400rpm/60 knots. The "full coverage" cowl flap really helps in the winter. I extend the spoilers progressively on short final, so I have full spoiler just after flaring, hold it off until it's in a three point attitude, and just let it settle down. Full spoiler early
  10. xintersecty

    Flight test Grob 109B

    Just curious do you have any stats about your trip? What was the flight distance, fuel consumption, and cruise speed? How many days did you take for this trip?
  11. xintersecty

    Trailer for grob109b

    Did you ever get an answer? Did you ever get an answer? I am working on a similar problem. It looks like a 8.5x28 standard trailer should be long enough.
  12. HiFlite

    Tailwheel Replacement

    This TSO'd wheel from Wings & Wheels is reported to work fine, after adjusting the spacer lengths slightly to fit your individual fork:
  13. HiFlite

    Tail wheel....

    The 1-piece tail wheel makes it very difficult to change the tire and tube. This TSO'd 2-piece TOST wheel is a near-perfect fit (the spacer lengths need to be slightly modified to fit your fork.) https://wingsandwheels.com/aircraft-parts/wheels/3-inch-tost-tail-wheel.html The TOST tire is reported to be of much better quality than the AeroClassic, which tends to be not particularly round.
  14. Jim Lee

    Most Excellent Wave Flight by Jim Lee

    Thanks Eric. Long wings (for soaring - always!), normal small tires with wheel covers. All seams taped, including cowlings, gear legs, wheel covers, drain holes, and wingtips. I almost always wait until descent to 2000'agl to let the air warm the engine before starting. We also descend slowly without spoilers to be kind to the gel coat. Best for plane and engine to warm up in the lower altitudes slowly. I orbit the airport and wait for 120 degrees oil temp so that if I need to go around in the sporting conditions, the engine is ready to perform. As I orbit the airport at 800-1000ag
  15. Rob

    durable covers for phoenix

    I bought the same from planecover.cz. now 9 months old. grt rob
  16. Barry.h

    durable covers for phoenix

    I have just bought a set of outdoor covers for my aircraft - #21 in Australia, from https://planecover.cz/ and they fit very nicely. Complete with a changeable tip for the 2 wing lengths. I took some video of them fitted:
  17. Dave

    Choke knob won't stay open

    At last inspection I had to replace the choke return springs on the Bings as one was stretched out and not closing the choke properly. Thereafter, the choke control in the cockpit did not want to stay open...just as you said. Have been holding it in open position until engine warms a bit.
  18. Barry.h

    Choke knob won't stay open

    My choke appears spring loaded to open (in, deactivate). It doesn't ever want to stay out (closed, choked) which seems right to me; It is only needed for a moment when starting (perhaps it is not as cold in Australia) so it is no problem to hold it, and I much prefer the idea that it cannot be left accidentally closed (on) and will always spring open when I let go.
  19. Eric Greenwell

    Choke knob won't stay open

    The choke knob used to stay where I put it, so it was easy to start with full choke, then push it in gradually as the engine warms. Now, it starts sliding in as soon as the engine starts, which leads to awkward (and potentially dangerous), distracted efforts to pull it back out while trying to complete the checklist, or taxiing to the runway. Anyone know how to keep the choke where it's put?
  20. Gfeldman

    broken rotax muffler spring

    Hi Eric, Both. A few years ago a Rotax powered Sinus motorglider was destroyed in North Palm Beach County airport because I think of a muffler induced fire due to broken springs. George
  21. Eric Greenwell

    broken rotax muffler spring

    Is that to keep the pieces from falling off? Or is the safety wire intended to hold the pipes together, even if they then leak a bit?
  22. Gfeldman

    broken rotax muffler spring

    I think it’s also a good idea to safety wire them in place. George Feldman
  23. Doug Levy

    broken rotax muffler spring

    I had one of my muffler springs break. I've now added silicon RTV to the springs after replacing that one. I carry a couple of them in my tool kit in the Phoenix. Something to look for while doing each pre- flight. If you are doing a five year rubber hose change it might be a good time to replace them as you will be removing the muffler.
  24. Eric Greenwell

    Most Excellent Wave Flight by Jim Lee

    I'm also wondering which wing tips he used, and if the ground winds (which can be severe at Minden during wave) were a problem. I often use the short tips for winter wave flying out RLD (Richland, WA), as the ground winds can be mild at the start of the flight, but can increase substantially as the day progresses.
  25. mikeschumann

    Most Excellent Wave Flight by Jim Lee

    Pretty impressive, particularly if he did this flight with his tundra tires.
  26. Jim Lee flew his Phoenix out of Minden for a 500k wave flight yesterday (Nov 4). Check it out on the OLC, download the IGC to SKysight, select the 5K Wave parameter, and see the almost perfect jutaxposition of trace and wave lift (also in the attached image). I hope Jim will describe it a bit, and tell us if there was any problem starting the engine after a four hour flight at 18K.
  27. philphil_99

    Aircraft Parts wanted

    Okay, I'll let you know. Thanks
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