SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Aug 19, 2006, 06:41 PM
Ascended Master
Sparky Paul's Avatar
Palmdale, CA
Joined Oct 2000
13,379 Posts
Discussion
High speed pass

At the AVTI field today... absolutely beautiful day, not a cloud in the sky, very little wind..
Tony Frackowiak was flying his eFlite Ultra Stick e25 ARF, with the eFlite 32BL motor... 2P3S battery.
Level flight speed works out to about 85 mph!
Sparky Paul is online now Find More Posts by Sparky Paul
Reply With Quote
Sign up now
to remove ads between posts
Old Aug 20, 2006, 01:23 AM
Registered User
HELModels's Avatar
Joined Aug 2003
2,631 Posts
Interesting. You seem to be saying that in that very short distance covered in the pictures, there is a variation in the speed estimate which you based on pixel counts. Is this variation in estimated speed due to lens curvature, camera angle, or pixel miscount? Looks like you kept the plane pretty close to the center of the lens, possibly.
HELModels is offline Find More Posts by HELModels
Last edited by ElectroStorch; Aug 20, 2006 at 01:36 AM.
Reply With Quote
Old Aug 20, 2006, 11:18 AM
Ascended Master
Sparky Paul's Avatar
Palmdale, CA
Joined Oct 2000
13,379 Posts
Quote:
Originally Posted by ElectroStorch
Interesting. You seem to be saying that in that very short distance covered in the pictures, there is a variation in the speed estimate which you based on pixel counts. Is this variation in estimated speed due to lens curvature, camera angle, or pixel miscount? Looks like you kept the plane pretty close to the center of the lens, possibly.
.
Yes... all of the above... and locating the precise points on the plane for each image is the biggest contributor.
I held the camera steady, didn't follow the plane at all. Otherwise the photo analysis gets more difficult, having to accomodate the motion of the background and the plane.
How it's done.... this with a video camera
http://www.angelfire.com/indie/aeros...amplesheet.htm
Inflight speeds
http://www.angelfire.com/indie/aerostuff/inflights.htm
Sparky Paul is online now Find More Posts by Sparky Paul
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Best High Speed Low Altitude Parkie Pass LTChip Parkflyers 8 Oct 28, 2012 11:39 AM
Video Super close high speed typhoon 3d pass Fly Or Die Electric Plane Talk 1 Jan 24, 2007 11:31 AM
Video EZ Star high speed pass and more! dnorm Electric Plane Talk 3 Jan 11, 2007 03:41 PM
Video K&A Park Mig 15 High Speed Pass Greg Beshouri Electric Plane Talk 0 Jun 03, 2006 02:26 PM