FPV hobby

[garry 36]

Hello friends! I am sure that on this forum there are people engaged in this fascinating hobby flights from the first person. I'm here to discuss issues related to FPV.
Question one: which models do you prefer?
I like flying wings.

[Admin 2545]

Hello buddy, I'm glad you appeared on this forum and I hope this topic will be successful ...!!

If you have something interesting to show, please let us know...!!

,,,all the best...!!!

[Admin 2545]

,,,my friend, I think it would be interesting to present some flying wings ... what do you say?

[garry 36]

Quote

 

Now the class of racing wings is becoming very popular. They are small in size, up to 1200 millimeters in span, equipped with a flight controller, a powerful engine (used from racing quadrocopters), a battery with a high current output. All this together allows you to develop a speed above 100 kilometers per hour. Controllers as a rule with firmware INAV, Very flexible and rich in custom firmware, allows you to customize the wing for your own needs. If there is a module GPS, the controller may lose the connection, or an emergency situation may return the wing to the launch site and plant it.

It's very exciting to watch!

 

[Admin 2545]

Beautiful flight...!!!

[garry 36]

To control the model for small distances, the frequency is usually 2400 MHz, the video frequency is 5800 MHz. For further distances more than a dozen kilometers, the control is 433 MHz, the video is 1200 MHz. So, that good antennas in this hobby are also in demand.

[Admin 2545]

... for these frequencies(433MHz,1200MHz), the antennas become much larger, so some miniature antennas should be used in this case...!!!

[garry 36]

We have to look for a compromise in the design of the antenna. These frequencies allow us to fly further. Antennas with good characteristics make it easier than antennas for 5.8 GHz.

[Admin 2545]

"I think something like that...

Frequency of work

48,5-100 MHz

174-230 MHz

Gain =9-10 dBi

[garry 36]

For what frequency is this antenna?

[Admin 2545]

10 minutes ago, garry said:

For what frequency is this antenna?

,,see above...!!!

,,very wide band antenna..!!

[garry 36]

It is interesting! But it is better for 1.2 GHz. Control of 433 MHz breaks at a power of 1 watt 50 kilometers. On board, the video transmitter has an omni-directional antenna in the form of a dipole VII (for better aetodynamics), its signal should be caught on the ground, and a good directional antenna is needed.

[Admin 2545]

,,,something like this...??

[garry 36]

I see such a construction for the first time. What are the characteristics of this antenna?

This is a variety

 

Edited February 18, 2018 by garry

[Admin 2545]

,,,this it"s monopole antenna with ground plane radials...!!!

,,,if you want I can do a simulation on the desired frequency...!!!

,,,see this...https://m0ukd.com/static/calculators/Quarter_Wave_Ground_Plane/quarterwave.html

 

433 MHz

 

 

[Admin 2545]

Fine Tuned Inverted Vee Antenna for longer range video transmission.

 

 

[garry 36]

This design is common on carriers flying over long distances, its main advantage is low resistance to air flow, as well as ease of manufacture.

[Admin 2545]

Garry, where can  find the drawings on these flying wings?

I would like to post them on this topic...!!!

[Admin 2545]

from here,,https://www.rcgroups.com/forums/showthread.php?1040837-KFm4-Epp-Swift-Like-(KESL)-32-Wing,,,such as a flying wing of its kind...!!!

 

with these dimensions....

[Admin 2545]

At your request, Garry, I made this biloop-antenna for the 1.16GHz frequency...

,,,with the execution drawings...

 

this piece of wire bends with the radius above

[garry 36]

Many thanks from the FPV brothers! I have already begun to build. Below found some drawings of models similar to those that you requested.

 

FT Mini Arrow v1.1 AIO.pdf.crdownload

 

RitwingDrak.zip

Edited February 20, 2018 by garry

[garry 36]

But for the first experience of construction I would recommend KESL 32, it is simple and with the fall, which is inevitable, does not suffer much and is easily repaired.
Also, to begin practicing a flight simulator, for example Picasim, this will save the model and give the necessary experience in piloting.

[Admin 2545]

FT Mini Arrow v1.1 AIO.pdf.crdownload...don"t work...!!!

[garry 36]

Sorry, this should work link

[garry 36]

Hello friends! I built the antenna according to calculations kindly provided by the respected ADMIN. For bending the wire, I made a pattern of metal, with the hands of the wire on the outer edge of the template, then pressing the pliers around the inner edge with pliers.
Soldered the two rings through the half-grooved edges. Soldered strips, then the whole construction on the reflector. The rest can be seen in the photo.