RR Rated M For Mature
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 638 ONLINE 20 EVENTS SEARCH REGISTER  START HERE
 
1 page3787 viewsPOST REPLY
MTA Hobbies . Model Rectifier Corp . ReadyHeli

.
.
FPV First Person View
UAV Autonomous Unmanned Aerial Vehicles
> Long Distance Microwave D'Link
 
 
flymotioncam
Heliman
Location: Port Macquarie AUS

My Posts This: Topic  Forum
Hi all

I'm looking for a downlink that will do 25miles/40 kms.I have read on the net that it can be done but the transmitter is heavy and expensive and needs lots of power/amps.I've heard it being done using a 100mw TX as well but you need a 4foot dish/reciever.This is for a autonomous helicopter so it needs to be fairly lightweight and reasonable quality video transmission. Is this an impossible task....looking for ideas.
02-12-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE  
 
 
junkpilot
Senior Heliman
Location: Summer/Alamogordo N.M. ,Winters/ Tucson

My Posts This: Topic  Forum
Microwave?

Talk to the Jet Propulsion Laboratory in Pasadena Ca.( they are a part of NASA ) They routinely talk to spacecraft half a billion miles away and you know weight is everything on a space launch!
Junkpilot

When you fly JUNK it's hard to tell when you've crashed!
02-12-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
HiroboEric
Veteran
Location: Los Angeles, CA.

My Posts This: Topic  Forum
wirelessvideocameras.com

Eric Pacheco, AirWorksRC.com
02-12-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
jb_turner
Elite Veteran
Location: USA

My Posts This: Topic  Forum
100mw is not enough. You may have to contact the military to see what they use .

"wirelessvideocameras.com"

That is too funny.

JB "Do a SEARCH" Turner
02-12-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
ScareCrow_Delta
Veteran
Location: Sebastian, FL

My Posts This: Topic  Forum
25miles is a long distance. VHF radios used by the miltary with 22mile range transmit at 40watts

~~~~ Defy the laws of gravity....gracefully ~~~~
02-13-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
CJames
Elite Veteran
Location: Back in KCmo

My Posts This: Topic  Forum
Are you looking for a data or video transmitter?
Opps, never mind, just re-read your post

I'm allways right 97% of the time..............So who cares about the other 4%??
02-13-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
RescueHelicopter
Veteran
Location: Portland Oregon

My Posts This: Topic  Forum
what are you using this for?
02-15-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
michaelconnor
Heliman
Location: USA

My Posts This: Topic  Forum
I know this doesn't exactly apply, but a friend of mine on team iFiber Redwire got a 125mile 11megabit 2.4GHz connection with an unamplified wireless adapter at this year's DefCon Wifi Shootout...granted, the antenna was a bit larger than usual. I'd say 25miles isn't impossible with a small air-born omni-antenna and 100mA, but you'd need the ground antenna to be larger and highly directional. Also, the required throughput is going to be a very important factor with respect to feasibility. If you're ambitious, you could have the ground antenna actuated to vector it toward the heli's reported GPS location. Unfortunately, I'm unaware of anything like this presently in the commercial sector. My best advise is to buy some different equipment configurations, and experiment until you find something that works.
02-18-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE  
 
 
AUTOSTART
Heliman
Location: Indonesia

My Posts This: Topic  Forum
DataLinks

Have you tried MicroHard? A canadian company.
IP920 i think the model is, has claimed 60 miles non line of sight.

GP
04-27-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
Aerosight
Heliman
Location: Central Oregon

My Posts This: Topic  Forum
Here may be what you need..

[url=http://www.gigawave.co.uk/]
GPS tracking antennas and video links used for nascar etc..

Aerosight Innovations
08-01-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
RQ-1B DRIVER
Senior Heliman
Location: Whittier, CA

My Posts This: Topic  Forum
Links

Not necessarily the power but also antenna gain . I know one 5 ghz link 10 watts is good for about 130 miles.
08-01-2006 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
1 page3787 viewsPOST REPLY
Power Helis . CANOMOD . Experience RC

.
.
FPV First Person View
UAV Autonomous Unmanned Aerial Vehicles
> Long Distance Microwave D'Link
 Print TOPIC Advertisers 

Subscribe to This Topic

Saturday, November 7 - 7:31 pm - Copyright © 2000 - 2009 runryder.com | email | link to rr | START HERE | NF