DA/DL50, DA 85, DA 100 Stats
04-07-2008, 09:52 AM
#1
DA/DL50, DA 85, DA 100 Stats
Ok, I'm trying to gather data on a few different model engines in order to make statistical determinations on performance and comparisons. If you're interested in how the DA 85 compares to the DA 100 or how the DA 50 really compares to the DL 50, then I need your data. This IS NOT to start any brand or model wars. It is to make a true comparison using engines around the country.
Please send what engine you have, the top RPM (taken with a tachometer), what prop(s) you're using, what's your exhaust set up (specifics are welcome), and what the altitude of your flying field is to [email protected].
The comparison will only be as good as the data set and I need people to contribute. This is discreet so no one can start any arguments and so there's no need for you to inflate your RPM numbers.
I will post the results once I have enough data to make the comparison. For those who care to know, I'm going to be using SAS 9.1 with a mixed model (Proc Mixed) approach. I'm going to separate the groups by engine and exhaust among the props. Depending on it's effect, I may also further separate by altitude. Probably go with 0-3500 ft. and 3501-7500 ft. ranges, but we'll see once I get some data. I'm going to consider engine and exhaust as fixed effects and altitude as random effects. My model will be RPM = engine | exhaust | altitude.
Please send what engine you have, the top RPM (taken with a tachometer), what prop(s) you're using, what's your exhaust set up (specifics are welcome), and what the altitude of your flying field is to [email protected].
The comparison will only be as good as the data set and I need people to contribute. This is discreet so no one can start any arguments and so there's no need for you to inflate your RPM numbers.
I will post the results once I have enough data to make the comparison. For those who care to know, I'm going to be using SAS 9.1 with a mixed model (Proc Mixed) approach. I'm going to separate the groups by engine and exhaust among the props. Depending on it's effect, I may also further separate by altitude. Probably go with 0-3500 ft. and 3501-7500 ft. ranges, but we'll see once I get some data. I'm going to consider engine and exhaust as fixed effects and altitude as random effects. My model will be RPM = engine | exhaust | altitude.
04-07-2008, 01:16 PM
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RE: DA/DL50, DA 85, DA 100 Stats
DA 50, MTW 75 pipe, Vess 23A, Amsoil 100:1 87 octane. 7600rpm average summer day at 85 degrees, 500 ft MSL. Vess 23B 7200 rpm same setup, same day.
Doug
Doug
04-07-2008, 04:41 PM
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RE: DA/DL50, DA 85, DA 100 Stats
DA 50, standard muffler, NX 23x8, Amsoil 80:1 87 octane. 6900 rpm average at 60 degrees, 100 ft MSL.
Mejzlik 23x8, 6850 rpm same setup.
04-07-2008, 10:28 PM
#7
RE: DA/DL50, DA 85, DA 100 Stats
ORIGINAL: Pat Roy
Good idea Ben. If people limit the input to DA only comparisons and leave other manufacturers out of it this should be something pretty useful.
Good idea Ben. If people limit the input to DA only comparisons and leave other manufacturers out of it this should be something pretty useful.
There's also a lot of people running the DL 50's and i've heard all kinds of comparions between them and the DA 50. So the other question would be 'How does a DL 50 compare to a DA 50?' In the future we could continue this and look at differences between DA 100 Gen 1 vs. DA 100 Gen 2, 3W 106 and DA/3W 100, or even DA 170 vs. 3W 170.
I thank you guys for the replies, but please email the data to [email protected]. I'm trying to avoid any performance or brand wars and I don't want other people seeing the data until I release it.
