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RCP 2021-016

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7 Comments on RCP 2021-016

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Chris Kidwell said : Report 7 months ago

The original proposal had many more requirements about the use of Ketrel Data Drop and recording the timestamps. It was later greatly shortened to a simple generic statement on the placement of the sensor. That small change should reduce the chances of abnormal readings like we saw at NARAM when the sensor was left in direct sunlight, so I support this change.

The Logic and Effect sections of the RCP should be amended to be in line with the simplified wording.

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STEVE KRISTAL said : subscriber Report 7 months ago

For NARAM, I would actually take this a step further and require the temp at time of launch to be recorded on the flight card at the time of flight, not at check-in.  Temperature has a big effect on how we adjust altimeter readouts for the final score.  For barometric altimeter-based altitudes to be accurate, the temperature needs to be accurate.

NRC events are different, and you have to go with what you have.  But for NARAM, where records are likely to be set, we should try to be more accurate.

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CHAD RING said : editor Report 7 months ago

Steve. While I don't disagree with your intent here, I want people to be aware of real world implantation. Who is going to do this at NARAM? One more added thing to do, given now we are scraping for enough to run the range. And if you were to require it at launch instead of check in, how many flight cards are coming back to data entry with NO temp on them? It already happens occasionally now, it will be many times worse when it's gotta be remembered at the pad. Just passing along as food for thought here. :)

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BRIAN GUZEK said : subscriber Report 6 months ago

As someone who has sat behind the big switchboard, it would be easy enough for the LCO (or Queue Manager, though we haven't had one for a couple of years) to record the temperature.

Reply
Wolfram von Kiparski said : subscriber Report 7 months ago

 

What we don't need are unfunded mandates.  Send my section (MTMA) a free Kestrel Data Drop and I will vote yes for this RCP.  I can't guarantee that everyone in my section will vote yes.

 

Reply
CHAD RING said : editor Report 7 months ago

 

I tend to agree with Bernard, let's not get too specific.  I have been to NRC launches that the CD/club did not own a nice digital thermometer. A call to a nearby weather reporting facility was probably just as good, as even if you do have a $300 Kestrel setup and shaded and all, it could easily warm or cool 3 or 4 degrees from checkin to actual launch.

 

Reply
BERNARD CAWLEY said : subscriber Report 7 months ago

I haven’t been to enough NARAMs to observe the consistency or inconsistency of the placement of the thermometer used to record the temperature for use in temperature correction of altimeter data, but I certainly agree it should be consistent, and having the official thermometer up at the top of the tent doesn’t sound good. 

Especially in conjunction with RCP 2021-017 to remove the 1% exceedance requirement when setting a new record, consistency of recording these temperatures across contests, not just at a given contest, will be important.

Whether use of a Kestrel Data Drop is the best way to do this I will leave to folks more directly involved in organizing any given contest as they decide how to best meet the “sensor shall be placed in a well-ventilated, shaded location near the launch site” requirement. It seems to me a digital thermometer on the table at check-in, as long as it’s in the shade, would meet the proposed rule requirement, as would such a device placed on a chair or box under and shaded by the check-in table if check-in isn’t shaded at a given meet.

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