TE probe vibration

Tailplane mounted video cams show fin mounted TE probes to be
bouncing and jiggling up and down during flight. Do we have any
information to indicate whether this affects their performance?

John Galloway

On Thursday, December 11, 2014 11:00:05 AM UTC-8, John Galloway wrote:
Tailplane mounted video cams show fin mounted TE probes to be
bouncing and jiggling up and down during flight. Do we have any
information to indicate whether this affects their performance?

John Galloway

Don't know, but it has to add a small amount of additional drag. A carbon fiber tube, being lighter and more rigid, would vibrate at a higher frequency, less magnitude, and probably further from the lower frequency movements of the fuselage.

That's the formation of a Von Karman vortex street. Massive drag, some turbulators (or wrapped diagonal lining like on car antennas) might nullify it and also reduce drag quite a bit.

On Thursday, December 11, 2014 3:41:58 PM UTC-5, J. Nieuwenhuize wrote:
That's the formation of a Von Karman vortex street. Massive drag, some turbulators (or wrapped diagonal lining like on car antennas) might nullify it and also reduce drag quite a bit.

That or 25mg Viagra applied to the TE Probe before flight.

P3

On Thursday, December 11, 2014 3:06:38 PM UTC-6, Papa3 wrote:

That or 25mg Viagra applied to the TE Probe before flight.

P3

What if you fly for more than 4 hours?

On Thursday, December 11, 2014 4:18:35 PM UTC-6, Steve Leonard wrote:
On Thursday, December 11, 2014 3:06:38 PM UTC-6, Papa3 wrote:

That or 25mg Viagra applied to the TE Probe before flight.

P3

What if you fly for more than 4 hours?

Seek Medical Attention!

On Thursday, December 11, 2014 5:55:11 PM UTC-8, Tim wrote:
On Thursday, December 11, 2014 4:18:35 PM UTC-6, Steve Leonard wrote:
On Thursday, December 11, 2014 3:06:38 PM UTC-6, Papa3 wrote:

That or 25mg Viagra applied to the TE Probe before flight.

P3

What if you fly for more than 4 hours?

Seek Medical Attention!

No, no, just go for a record, don't stop to see a doc! A TE Probe boner is a terrible thing to waste.

Just hang a flag on that puppy and taxi right on in to the ER!
Seriously though, I have seen wildly flopping probes that made me think that metal fatigue would surely ensue shortly. Maybe try a different probe, one with a stiffer shaft and less weight at the end (triple probe) .
Cheers,
JJ

....Or maybe the probe's socket has come loose in the matrix of the fin.
That might be worth checking.


On 12/12/2014 7:05 AM, JJ Sinclair wrote:
Just hang a flag on that puppy and taxi right on in to the ER!
Seriously though, I have seen wildly flopping probes that made me think that metal fatigue would surely ensue shortly. Maybe try a different probe, one with a stiffer shaft and less weight at the end (triple probe) .
Cheers,
JJ

--
Dan Marotta

At 16:18 12 December 2014, Dan Marotta wrote:
....Or maybe the probe's socket has come loose in the matrix of the
fin.
That might be worth checking.


On 12/12/2014 7:05 AM, JJ Sinclair wrote:
Just hang a flag on that puppy and taxi right on in to the ER!
Seriously though, I have seen wildly flopping probes that made me
think
that metal fatigue would surely ensue shortly. Maybe try a different
probe,
one with a stiffer shaft and less weight at the end (triple probe) .
Cheers,
JJ

--
Dan Marotta

The original question was to find out whether the natural
ossicaltion/vibration/jiggling of a fit healthy TE probe in flight has any

effect at all on the accuracy of the TE compensation