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Search: Posts Made By: henry_crun
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Forum: Tech Log
7th Feb 2014, 15:54
Replies: 70
Views: 15,366
Posted By henry_crun

Hazelnuts It was only a five minute idea,...

Hazelnuts

It was only a five minute idea, and it does answer the OP question. I don't presume to have answered the prayers of all maidens everywhere, but I feel the device could have some merit. ...
Forum: Tech Log
7th Feb 2014, 08:31
Replies: 70
Views: 15,366
Posted By henry_crun

MrSnuggles - that's where the spread spectrum...

MrSnuggles - that's where the spread spectrum comes in!
Forum: Tech Log
6th Feb 2014, 12:53
Replies: 70
Views: 15,366
Posted By henry_crun

Tu.114 - sort of double doppler for each path,...

Tu.114 - sort of double doppler for each path, the sound pulses have to travel further forward than rearward

Sailplane variometers are well described (including math) in the book by Lorne Welch,...
Forum: Tech Log
6th Feb 2014, 12:17
Replies: 70
Views: 15,366
Posted By henry_crun

This is done on gliders/sailplanes and produces a...

This is done on gliders/sailplanes and produces a variometer output, ie indicates the total energy. But no use for airspeed.
Forum: Tech Log
6th Feb 2014, 12:13
Replies: 70
Views: 15,366
Posted By henry_crun

No comments on my acoustic anemometer above? Did...

No comments on my acoustic anemometer above? Did nobody reconise it is a stand-alone direct-reading machmeter? No other air data required!
Forum: Tech Log
5th Feb 2014, 08:11
Replies: 70
Views: 15,366
Posted By henry_crun

Okaaaay - let's invent a new one then. Use...

Okaaaay - let's invent a new one then.

Use three small transducers mounted in a straight line fore-and-aft. Emit pulses of sound from the centre transducer and receive them on the forward and aft...
Forum: Tech Log
3rd Feb 2014, 21:08
Replies: 70
Views: 15,366
Posted By henry_crun

Unusual airspeed sensor One little known...

Unusual airspeed sensor

One little known airspeed sensor used ion flow to measure airspeed. As I recollect it measured electrical ion flow transverse to airflow and a combination of devices could...
Showing results 1 to 7 of 7


 
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