Author Topic: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?  (Read 228 times)

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Offline NCHighCountryWX

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I am considering a purchase of a Rainwise System over a Vantage Pro System.

One thing that concerns me on the Rainwise is if the prop blades do indeed stall in gusty variable winds.

Is this an issue?

Here is a video another forum member posted that validates my concern.

Thanks

https://www.youtube.com/watch?v=RQciYwaEyhU


NCHighCountryWX
Banner Elk and Denver NC

Offline ValentineWeather

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Re: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?
« Reply #1 on: May 13, 2018, 01:44:35 PM »
Interesting, just looking at video its something I would stay away from. Glad you posted... =D>
Randy

Offline WheatonRon

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Re: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?
« Reply #2 on: May 13, 2018, 03:42:03 PM »
I have the Rainwise 111 rain gauge and two Davis VP2s. The VP2 is a great product except for the rain gauge. I think the reason for the better accuracy is the Rainwise has an 8 inch cone vs. the VP2 which is about 6.5 inches. One of these days, I am going to disconnect the rain tipper in my VP2s and connect it to the Rainwise. For example, my Rainwise recorded .48 inches of rain last night, one VP2 recorded .32 and the other VP2 recorded .28. My manual CoCoRaHS gauge (the ďgold standardĒ in my view) had .48 too.
« Last Edit: May 13, 2018, 05:05:22 PM by WheatonRon »
Davis VP2 with Daytime FARS, SHT31 (2 complete systems-1 for uploading to the internet, the other system for test and play); Rainwise 111; CWOP--CW5020; WU--KILWHEAT17; WeatherCloud.net; CoCoRaHS--IL-DP-132

Offline MonumentHillWeather

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Re: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?
« Reply #3 on: May 13, 2018, 05:02:58 PM »
Iím not sure that is the anemometer actually stalling. Iím leaning towards thinking itís just the effect you get when the anemometer spins so fast it looks like itís barely spinning at all on video due to a Video frames per second limit. Not sure if this has a specific name, and I could be wrong all together, but itís a possibility.

I once took a video of my VP2 anemometer and when I viewed the video, it looked as though it wasnít spinning at all at times. I know that it indeed was though, and very fast.

- Matt
Monument Hill Weather... Leeds, Maine, USA
Davis Vantage Pro2 with Meteobridge & Cumulus V1.9.4

http://monumenthillweather.webs.com/
https://www.wunderground.com/personal-weather-station/dashboard?ID=KMELEEDS7

Offline ValentineWeather

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Re: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?
« Reply #4 on: May 13, 2018, 05:13:52 PM »
Good point, maybe others will chime in about whether its just a camera illusion similar to airplane propeller spinning sometimes it looks like it reverses.
Randy


Offline ValentineWeather

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Re: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?
« Reply #6 on: May 13, 2018, 06:06:19 PM »
Good information. I looked at the video again and in this case it sure looks like its stopping.
Randy

Offline MonumentHillWeather

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Re: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?
« Reply #7 on: May 13, 2018, 06:06:32 PM »
Thanks for the link. I knew it probably had an actual name!
Monument Hill Weather... Leeds, Maine, USA
Davis Vantage Pro2 with Meteobridge & Cumulus V1.9.4

http://monumenthillweather.webs.com/
https://www.wunderground.com/personal-weather-station/dashboard?ID=KMELEEDS7

Offline CW2274

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Re: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?
« Reply #8 on: May 13, 2018, 06:30:38 PM »
I looked at the video again and in this case it sure looks like its stopping.
Completely agree. If it is still spinning, at that instance, you'd never know just looking. :eek:

Offline miraculon

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Re: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?
« Reply #9 on: May 13, 2018, 06:31:07 PM »
Kind of like this?


Greg H.




Blitzortung Stations #706 and #1682
CoCoRaHS: MI-PI-1
CWOP: CW4114 and KE8DAF-13
WU: KMIROGER7
Amateur Radio Callsign: KE8DAF

Offline CW2274

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Re: Rainwise MX Propellor Anemometer Stalls in Gusty Variable Winds ?
« Reply #10 on: May 13, 2018, 06:33:46 PM »
That's probably the best example I've seen.  8-)

 

anything