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Touring Motor Gliders Association (TMGA)

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  1. Today
  2. carl goodier

    Sauer Engines

    Looking at 2 TMG's, one with a Rotax (water cooled) which I am familiar with, and one with a Sauer 1800 (air-cooled) which I am not familiar wth. The Sauer seems to have Aircraft certification to JAR which improves my confidence in it. can anyone share its experiences, especially in hot environments ? I know Jabiru uses air-cooled engines too
  3. Last week
  4. Eric Greenwell

    broken rotax muffler spring

    That sounds like it was a defective spring to last only 130 hours. I have 650 hours, springs look fine; nonetheless, I'll order some springs and carry them - an easy fix, even while traveling somewhere.
  5. Steve Chase

    voltage regulator fail

    Mine was a sudden drop and I thought your first sentence “Recently had a sudden drop of dynon indicated voltage to 11.3 volts. This was the indication with either battery selected or both selected.” Meant we had the same kind of problem? Glad you didn’t waste your money Art.
  6. Gfeldman

    broken rotax muffler spring

    Hi Eric Great questions. 1) Not sure why it broke. The classic answer is too much vibration or too much tension. Other springs look fine so it could have been an accumulation of stress at one point along the length of the wire. 2) 2/3-3/4 from one end 3) other springs look fine 4) about 130 hours 5) I was doing a preflight of the engine with the muffler caused fire in the Sinus motorglider that was on the cover of this months Soaring magazine on my mind. 6) I have ordered extra springs just in case but I have no plans to replace the others. Just go to the CPS website and look for rotax 912 muffler. Hope this helps George
  7. Eric Greenwell

    broken rotax muffler spring

    Hi George, A few questions: Do you have any idea of why it broke? Where did it break? Do the other springs show any sign of distress? How many hours on the engine? How did you discover it? Are you going to replace all the springs, just in case? Maybe each of us should carry a few springs as spares. What was the part number you used to order it?
  8. Hi all, Preflight inspection of my Phoenix revealed a broken muffler spring (see below). I have ordered replacements from California Power Systems. George Feldman N33GF
  9. Art Daun

    voltage regulator fail

    We did remove, inspect (saw no abnormalities) and reinsert the plug but it had no effect on the problem. The new voltage regulator came with a new plug and spades neither of which was used in the change out. If the problem recurrs I will follow your advice. Not sure if we had the same problem because of my gradual falling voltage. Thanks for the input. Art
  10. hawk300bg

    Grob 109 mechanic

    I did but it did not work. I realize that should put the prop in climb pitch but it did not. Still cannot get more than 2400 rpms. I’ve checked the prop with an optical tach and it agrees with the instrument tachometer. Not sure what next. Have you ever had a problem with the pitch change mechanism ?
  11. Earlier
  12. chasers03

    voltage regulator fail

    I am sorry to disappoint you but after having experienced the same identical symptom twice with my 912 ULS each time I was guided by my importers A&P and Joe, the SM of Lockwood to suspect the 6 wire gang black plug you see in the photo at the bottom of the regulator. I removed the plug and lubricated and reinstalled and the voltage charging started back up. After this happened the second time I was guided by my local A&P to remove the female spades from that black housing, put new females ends on the wires and reattach using dielectric grease and so far no problem. That black plug combined with weak female spade receivers & gravity/vibration is a weak link in the electrical system of these engines. Be prepared for it to happen again... I will say it is disconcerting to experience low voltage/no charging when you are flying on labor day and have 2 hours to go.....But R&I of the plug worked again....Best wishes Art...Steve Chase with my Bristell at almost 500 hrs.....
  13. Grobber

    Grob Factory Survey Re-engine with 912 Rotax

    Does anybody know if the Grob Aircraft factory has decided on a direction based on the survey yet? Cheers. Mike.
  14. bberson

    Grob 109 mechanic

    On the ground, did you try twisting the blades to release the high pitch catch tab on the prop? Do that before every flight.
  15. hawk300bg

    Grob 109 mechanic

    Help ! I am the owner of a Grob 109 motor glider and need a mechanic who is familiar with the pitch change mechanism and how to diagnose and fix the problem. The prop is stuck in cruise pitch and will not return to climb pitch. I am based at DYL just outside of Philadelphia, PA. I am looking to hire a mechanic to fix the problem, I will also pay expenses to get to DYL. Rich Kochanski N300BG call or text me at 215 738-9253 email hawk300bg@gmail.com
  16. Recently had a sudden drop of dynon indicated voltage to 11.3 volts. This was the indication with either battery selected or both selected. It was accompanied with a failure of the low voltage light to come on with the engine stopped. My mechanic could not come up with a method of actually checking the voltage regulator but on the advice of Lockwood aviation we replaced the voltage regulator with a new one ordered from Lockwood. This change out fixed both problems. The indicated voltage on the dynon with the engine running is 13.5 volts. According to Lockwood a gradual fall of this voltage is indicative of a failing voltage regulator—it doeanʻt have to happen all at once. In retrospect, I thought that an indicated voltage in the 12.3-12.5 range was adequate and it actually was telling me that a failure was occuring. The voltage regulator is located on the engine side of the firewall just opposite the dynon display. It was fairly easy to access by moving the dynon out of the way on the cockpit side and removing the left air filter on the engine side. Definitely a two person job.
  17. brasov

    Brasov IS28M2

  18. Resilient

    What is the status of the Lambada?

    Its my understanding that there is some variety of modification to the tail that needs to be done and runs about $12K. I believe the flapperon don't have the Vne restrictions but most (all?) of the spoiler only ones do.
  19. Eric Greenwell

    Phoenix 912 engine loses 500 rpm during climb

    Good point, Jim, and one I had not considered. Seafoam was the additive several Rotax owners suggested, but not for continuous use; instead, putting it in full tanks that are run low just before a normal oil change. Responding to question about fiberglass motorcycle tanks, Seafoam replied " Sea Foam is made from gentle petroleum ingredients and works safe in any combustion engine’s fuel tank. Anyway, there is nothing about Sea Foam that could cause harm to your motorcycle’s tank – no worries at all!". I'd want some corroboration of that before using it.
  20. masterdmb

    Electraflyer ULS WANTED

    Private pilot looking for FAR103 ULS; thank you.
  21. Jim Lee

    Charge Fail Light On

    To summarize as I understand it: The charge fail light showed a charging problem with Alan's Phoenix. Changing to a different type of bulb did not solve the problem. The problem was the voltage regulator. When the voltage regulator was changed, the problem was fixed. The wires to the voltage regulator were not changed. Therefore the charge fail light and the regulator wiring worked as it was supposed to and the regulator did not. We have had troubles with 2 or 3 voltage regulators. So far as I know every charging problem in the Phoenix has been the regulator. I have personally flown a customer's Phoenix which had a charging system failure and it turned out to be the regulator. The charge fail light was on and it worked like it should. I don't have any additional information about what type of charge fail bulb should be used.
  22. Jim Lee

    Phoenix 912 engine loses 500 rpm during climb

    Excellent write up to the conclusion of your rough engine, Eric. Thank you for sharing. The fuel tank coating is designed to protect the composite wing from the effects of 100LL and 91 octane unleaded, non ethanol. No testing has been done on any fuel additives. I very strongly advise everyone not to put any additive in the fuel of their Phoenix. You may pay the price of destroyed wings! Jim
  23. Jamey Jacobs

    TMGA active?

    Ron I've been flying locally near Livermore with a recent soaring flight from LVK to a cloudstreet on the western edge of the central valley (convergence) to east of Hollister then back to Mt Diablo. I'm looking forward to learning about local wave flying too. If you see good Wx forecasted, please let me know and maybe we can get together to explore the area. I used to fly sailplanes in Hollister, then owned a Carat (now Kurt Thams' Carat) based in Hollister, but only did about a dozen thermal flights in it. Maybe we could get together with Brook Sargent (Byron based Phoenix) for some flying, plan some adventures, and share info. Jamey
  24. Eric Greenwell

    Exhaust pipe crack observed

    Russ Owens had a cracked exhaust pipe like yours, which was removed, repaired, and replaced. I've been wiggling the end of the pipe during pre-flight to detect this sort thing, but now I wonder if that would only detect a large crack, and miss a developing ones. I think I will switch to visual inspection of the weld.
  25. During the annual inspection of N70JZ this year, inspector identified a crack in the exhaust pipe. Looks like i will order new one, but may weld-patch the pipe for a short term fix. Jim did not know of any other owners reporting this type of failure. I have included pictures here so that other owners can add a visual check to their pre-flight if desired.
  26. Ron Hess

    TMGA active?

    Hi Jamey, I also fly a Phoenix (SN29) in the San Jose/Hollister/Truckee area. I am looking forward to do some more adventuring beyond the local area, let me know if you have any trips planned. Plane is currently in Byron for annual. Here is a picture of Mt. Shasta taken earlier this year on a trip to Bend Oregon.
  27. Nicolas Neuss

    OK, let me test it...

    Hi Peter, thank you for the test message. Up to now I was not notified. Probably they want to avoid sending out too many messages for busy groups, and thus provide notification only in a daily bulk message. Regards, Nicolas
  28. flyingcircus

    OK, let me test it...

    Hi Nicolas, I've just started a new topic. Let's see if you get the notification. Regards - Peter
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