RunRyder RC
 6  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1600 views
HelicopterMain Discussion › Pitot tube?
08-28-2012 12:08 AM  5 years agoPost 1
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

Anyone ever mounted a pitot tube on an RC Heli? If so where did you mount it and how did it work? I'm thinking somewhere on the landing gear will be the best place? Open to suggestions.

Thanks, wrongler

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 12:22 AM  5 years agoPost 2
Dood

rrProfessor

Wescanson

My Posts: All  Forum  Topic

Judging by some full-scale applications, you can put it pretty much anywhere.

Not sure what good it will do on a toy helicopter that you fly forwards. backwards and sideways, though.
I don't think it will help you much with vertical velocity, either (the full scales have altimeters for that).

  ▲
▲ ▲

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 01:20 AM  5 years agoPost 3
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

I am looking for flat out speed, Forward flight. Just want to get an Idea of how fast I am going! Anywhere on the canopy is out because I don't want to have to disconnect it everytime I remove the canopy.

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 01:28 AM  5 years agoPost 4
captrlp

rrVeteran

Spanish Fork, Utah - USA

My Posts: All  Forum  Topic

Front of skids would be the only place that will provide accurate data. The probe must be in clean air. We've strapped small gps units to helis for the same purpose. The results were impressive!

Logo 480Xxtreme, Logo 550SX, Logo 600SX, Logo 700Xxtreme, Logo 800Xxtreme

PM  EMAIL  Attn:RR  Quote
08-28-2012 01:46 AM  5 years agoPost 5
cmsilvoy

rrKey Veteran

Durham, NC

My Posts: All  Forum  Topic

Dude,
Back in the days of early STABILIZED flybarless (flybarless is nothing new, it is the STABILIZED kind that we are all in love with now) the PRE-MIKADO V-Stabi (AKA V-BAR) built by Uli used pitot tubes to measure forward and sideways airflow.
These pitot tubes were commonly placed around the main shaft, sometimes on the antirotation guide, and worked quite adequately.

I think it was version 2.2 of the firmware that got rid of the pitots.

And it was at that point in time that Mikado saw the light and made the V-Stabi commonly available, and further known as the Vbar.

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 01:58 AM  5 years agoPost 6
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

I have also ordered a Voltron GPS mini logger, I just want to get land and air speed.

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 02:38 AM  5 years agoPost 7
Solmanbandit

rrElite Veteran

Tucson , AZ

My Posts: All  Forum  Topic

The best way would be to use a radar gun. I have a friend who has a pitot tube on his Super Chipmunk and it only starts to register above 18 mph. You would also have to angle it so it goes into the wind as well.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 02:44 AM  5 years agoPost 8
JWatson

rrKey Veteran

Mustang, OK

My Posts: All  Forum  Topic

If you need a Pitot tube, then you also need a Static port as well.

Jarrett Watson
http://jarrettrc.wordpress.com/

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-28-2012 02:52 AM  5 years agoPost 9
jphilli

rrKey Veteran

Atlanta, Ga.

My Posts: All  Forum  Topic

At work, we use a Novatel differential GPS for ground speed and a 6 port Aeroprobe for airspeed, altitude, side slip, and angle of attack. As already mentioned, you'd have a problem with AoA and airspeed coupling as a heli pitches down so much. You could easily correct with an IMU but probably not worth it.

I'm curious how accurate velocity data would be from a non differential GPS. It's usually the norm for hobbyists to strap an automobile GPS to their heli and retrieve the max velocity from a left to right and right to left run then average the results.

PM  EMAIL  Attn:RR  Quote
08-28-2012 03:12 AM  5 years agoPost 10
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

I think the voltron will register the highest top speed and average speed, as well as the pitot tube (with the static port). It will only be a guide to see if I am making improvements in speed or going the wrong way.

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 03:15 AM  5 years agoPost 11
AtTheCross

rrVeteran

Southern CA

My Posts: All  Forum  Topic

i put mine under the nose of the canopy, so far my fastest speed on my mongoose is 79mph using the spektrum airspeed indicator

ASI Green Mongoose CY29RC - 67 flights

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 03:23 AM  5 years agoPost 12
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

AtTheCross, what were you using?

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 03:55 AM  5 years agoPost 13
AtTheCross

rrVeteran

Southern CA

My Posts: All  Forum  Topic

this with the TM1000

I also have the temp sensor on the cylinder head
voltmeter on my battery, and finally the altitude module

ASI Green Mongoose CY29RC - 67 flights

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 03:59 AM  5 years agoPost 14
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

AtTheCross, I ordered the same thing from eagletree.

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 04:07 AM  5 years agoPost 15
jschenck

rrProfessor

La Vista, NE.

My Posts: All  Forum  Topic

I put the Eagle tree on a Trex-250 a year or two ago and did manage to hit something like 60MPH, in a slight dive. The pitot tube was velcro strapped onto the landing gear.

250's get kind of (like a lot) pitchy at full collective and full speed runs.

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2012 11:31 PM  5 years agoPost 16
torque

rrKey Veteran

bolivia , north carolina

My Posts: All  Forum  Topic

don't forget guys, if you are going to use the pitot tube and fly in moisture or winter, they must be heated.

PM  EMAIL  GALLERY  Attn:RR  Quote
08-29-2012 12:26 AM  5 years agoPost 17
Solmanbandit

rrElite Veteran

Tucson , AZ

My Posts: All  Forum  Topic

don't forget guys, if you are going to use the pitot tube and fly in moisture or winter, they must be heated.
Winter can be considered as a relative term depending on where you live.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

PM  EMAIL  GALLERY  Attn:RR  Quote
08-29-2012 12:56 AM  5 years agoPost 18
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

What happens in the winter if they are not heated?

Not that I do much winter flying.

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
08-29-2012 01:13 AM  5 years agoPost 19
cwright

rrKey Veteran

Blossvale New York

My Posts: All  Forum  Topic

They can ice over. I have a radar gun. I will be bringing it to Rochester with me. Couldn't make it to the field today but will bring it to the field next time I come.

PM  EMAIL  GALLERY  Attn:RR  Quote
08-29-2012 01:47 AM  5 years agoPost 20
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

Thanks Chuck

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1600 views
HelicopterMain Discussion › Pitot tube?
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Sunday, December 17 - 12:06 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online