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About solarguy54

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    Jr. Crew Member
  • Birthday November 29

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    Cottonwood, AZ
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  1. Low Fuel Pressure

    Great news. Based on a tip from someone else who has had this problem, I checked the orifice on the return fuel line to the gascolator. Sure enough, it was partially blocked with a tiny bit of fuel line debris from the recent rubber replacement. To find it, I had to screw the restrictor out of the barb connection and there it was. I'll let you know how it works on a hot day, but I think that was the problem. Corey, you might want to check this on your CTs that have been showing this behavior on hot days. Thanks for everyone's help. Sid
  2. Low Fuel Pressure

    And that's what I'm asking myself! It started after I replaced a 2012 fuel pump. But then I switched the new fuel pump with the same model fuel pump on a 2009 CTLS. Same thing happened. Also, the weather has just warmed up. Perhaps the Maverick gas station where I'm getting my 91 octane auto fuel is still using winter blend fuel. I know that a local new RV-12 is having some vapor lock problems too. I'm putting in a new sensor. It should be in in a few days. Also, I checked the clearance on the banjo bolts at the clamp block. I'm already using the thick washers (used and re-heated/quenched to soften they still measure 1.28mm as opposed to the .8mm washers that cause that problem.) I've checked all of the fuel system except removing and inspecting the transducer. Maybe I'll do that. I suppose something could be partially blocking the transducer.
  3. Low Fuel Pressure

    How much avgas do you add?
  4. Low Fuel Pressure

    Thanks. Here’s another possibility. SI-912-08. If you reuse copper washers and the clearance between the ends of the banjo bolts at the clamp block are insufficient, it can lead to intermittent sensor failure. Banjo bolt end clearance issues can also be caused by over-torqued banjo bolts. Must have minimum of .5mm clearance. I’ll check mine today. Will also clean sensor.
  5. Low Fuel Pressure

    Thanks Corey. Do you have the SB number? I can’t find it.
  6. Low Fuel Pressure

    Thanks. I just tried that and it didn't help. Fuel pressure drops briefly after a long, hot engine taxi (minimum throttle) followed by full throttle application (taking off after a full-stop landing and taxi back to departure end of runway). Concurrent with the fuel pressure drop is an rapid brief increase in fuel flow. from a taxi rate of 1 g/h to 10 or 12 gph. This is brief. Maybe 10 seconds. After that, the fuel pressure returns to normal full power pressure (in the mid 4's psi) and the fuel flow drops to the normal WOT of just over 6 gph. Since there are two different sensors involved, (fuel pressure and fuel flow transducer) this leads me to believe that it is an accurate depiction of what is happening. The only thing I can thing of is some kind of fuel vapor building in the line. I just finished my 5 year rubber replacement and I'm wondering if something isn't correct.
  7. Low Fuel Pressure

    So I just finished a 5-year rubber replacement on a 2012. Replaced the fuel pump as well. Now, on a warm day, after full-stop landing and a taxi back to the departure end of the runway, when full power is applied the fuel pressure will drop. From 4-5 psi down to 2 and sometimes down to 0. This generates a low fuel pressure warning (of course). Also, the fuel flow will jump to 10 or 12 gph while the low fuel pressure light is on. This will last for about 10-15 seconds, then the fuel pressure and fuel flow return to normal. I changed fuel pumps, and the same thing happens. Any thoughts? Are you supposed to vent the fuel pressure line or something? Could this be vapor? thanks, Sid Lloyd
  8. Rotax Power

    Wow, you guys were RIGHT ON!!! I had to pull the engine mount/engine to remove the airbox and give it a thorough check. Turns out that when the carb heat was OFF, the fresh air intake was partially closed. And it was significant. So I've lubed it and adjusted the cable. Now it opens FULLY!!! Can't wait to try it out and experience the increased HP. Thanks guys!!! Sid
  9. Rotax Power

    Thanks, guys. I'll double check that.
  10. Rotax Power

    So we have twoCTLS aircraft, a 2009 with a Neuform prop and a 2012 with a Sensenich. The 2009 has always out-climbed and had a higher airspeed at WOT than the 2012. I have both props pitched to run at close to 5500 RPM at WOT at cruise altitude. I assumed the difference was the prop. So yesterday, I took the 2012 up and recorded flight specs. Climb rate, RPM, OAT, cruise TAS, etc. Landed, quickly switched props, and repeated the tests. Turns out that the 2012 has a lower climb rate and about 10 knots lower cruise turning about 5200 RPM at WOT with the Neuform prop than the Sensenich. So, it’s putting out lower HP than the 2009 CTLS. Compression is fine. I remember that the owners who flew it to AZ from Dallas for delivery mentioned that they thought performance had dropped from when they had last flown it 9 months before. So, I’m suspecting varnish in the carbs. Both carbs are balanced at idle and at 4000 RPM. Think it’s time for a carb overhaul?
  11. Looking for Neuform CR 3-65-47-101.6 complete from Rotax prop flange forward. Also, will trade for Sensenich 3 BOR5/R 68C-FD. Standardizing our flight school CTs on Neuform.
  12. Recycling wheel balance weights?

    I use 3m brush-on contact cement, both sides, as per can instructions
  13. Low Cost ADS/B solutions

    As probably have many others, I have requested an MRA from FD to add a Dynon SV-ADSB-472 Dual Band ADS-B Traffic and Weather Receiver for the Dynon Skyview system. This will provide ADS-B “in” for an overhead view of traffic in the moving map display and a three dimensional view of traffic in the synthetic vision display. About $800 for the unit and another $30 for the required transponder antenna. These units have been on hold with Dynon due to some test issues. They just told me that they have the updated unit and software coming in this week for testing and if it is good, they will be ready to resume shipments. FD hasn’t approved this as an MRA yet due to the production hold by Dynon. Will let you know when it is ready.
  14. Production uAvionix Skybeacon UAT transmitter

    Working on an MRA with FD?