Concluded the landing test yesterday with 6 landing starting at dawn. Will schedule the noise testing in a few weeks and we are hoping to use my airplane since I have approval for the prop and would save switching the airworthiness certificate from standard to experimental which involves a DAR coming from Waco twice to do. I will have to take off and climb over the microphone at a certain altitude. This is the last step and hopefully the data will get processed and submitted and an STC granted soon.
The STC will be for the PA18 with an O-320 engine installed both 150 and 160 hp. The prop is type certified on the O-320 and O-360 engines and that data along with the STC data for the PA18 can be used to get a field approval or DER approval of the prop on other aircraft. It has gotten approval via that route on a 180 hp C172 converted to tail wheel and on a Pacer. I was considering pursuing an STC for the Pacer but having seen what this project took I don't think I have the time, patience or money to do it.A friend of mine has a PA 12 with an O320 on the front and is looking for a prop. When this prop is certified for O 320 will it only be for the PA18 or will the certification include other piper taildraggers with similar type certification PA11-PA12-PA18?
The performance data has to be interpolated to come up with the altitude at which the altitude the airplane has to climb over the microphone on take-off. The aircraft would again have to be put into the Experimental category and then back to standard which takes a DAR two trips, expense etc. If I use my airplane which has approval to run the prop it can be one trip to prove compliance.Just curious, but why wouldn't the noise test be conducted in the same configuration (same aircraft) as the other performance testing?
The performance data has to be interpolated to come up with the altitude at which the altitude the airplane has to climb over the microphone on take-off. The aircraft would again have to be put into the Experimental category and then back to standard which takes a DAR two trips, expense etc. If I use my airplane which has approval to run the prop it can be one trip to prove compliance.
I do not. I will ask about it though.Hey Steve:
Do you have any experience with the 3 blade 78” STOL prop? I debating whether to get that or the 82” two blade. It’s for a Carbon Cub EX1 I’m building that will have the CC363i engine.
Thanks,
Gregg
Not sure, I will find out.Steve, what are the inertia requirements mentioned above?
Gary
Pins are 0-7 incrementally increasing pitch. Same blades, different hub. There will be a chart when the prop for the PA18-150/160 is STC'd I am almost certain.Pitch pin question:
I have the 2GOM8 C82BGF installed on a PA-18-150 O-360. Pitch pins marked 2-7. Chart from included instructions below.
I also have the 2GOM6 C82F installed on a PA-18-150 O-320. Pitch pins marked 0-5. No chart included for PIN number to pitch. Do pins 0-5 = 2-7 and are the corresponding pitches the same??
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Looks like we will be able to use my airplane for the noise testing and hoping to do that before Thanksgiving. From what I know that is the last step in obtaining the STC.
No, more ideocracy. I update this thread as progress is made.Any sign of the noise testing?