https://www.youtube.com/watch?v=hCTD8hcZvsM
| DJI Naza-M V2 Setup Tutorial (4 min 51 sec) |
KK2 with No Acc and wide Gyro window for David Parry
Custom firmware for a broken accelerometer and wider gyro window.
Keeping you flying
Keeping you flying
Mystery summit - Beach adventures
This truck is so cool to drive I decided to also film it a bit 3rd person so you see it go:
| Mystery summit FPV adventures - The beach (5 min 11 sec) |
Sticky:
DJI Naza-M V2 Setup Tutorial
Discussion /
Posted by eirlink /
Today @ 02:55 PM / 50 Views /
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| DJI Naza-M V2 Setup Tutorial (4 min 51 sec) |
13th World Cup Podhorany (Airfield), Czech Rep. 01 Jun to 02 Jun 2013
13th World Cup
Podhorany (Airfield), Czech Rep.
01 Jun to 02 Jun 2013
предварительно:
шенген визы оформлены еще в марте...
(собирались в Италию)
страховки куплены сегодня Пыжику и нам,
завтра подлеты небольшие для порверки мат.части,
воскресенье: а мы ничего не забыли?! ;-)
понедельник ключ на старт!..
ТТТ.
бюллетень на прицепе....
Podhorany (Airfield), Czech Rep.
01 Jun to 02 Jun 2013
предварительно:
шенген визы оформлены еще в марте...
(собирались в Италию)
страховки куплены сегодня Пыжику и нам,
завтра подлеты небольшие для порверки мат.части,
воскресенье: а мы ничего не забыли?! ;-)
понедельник ключ на старт!..
ТТТ.
бюллетень на прицепе....
the FX-61 Phantom
Hi guys, here a first pic of my new Phantom...or at least the mainfuselage...one of my current projects...looks like a great plane, and a lot of work 
for sale
my stuff
Floats for Eflite Edge 540QQ 280
Floats for E-flite Edge 544QQ 280 3d plane
Below are pictures, a video and instructions for the floats.
These floats are based on a design by jimsp for the Champ. They are scaled up to 18 inches for the Edge.
Floats are made from 1/8” foam board from Dollar Tree. The 7 pieces and brace are cut, and the paper backing is stripped from both sides. The pieces are glued together as the attached drawing shows with glue such as Gorilla Glue or another waterproof glue. When dry, sand to final shape.
The back of the floats (behind the step) are angled up ½ inch for water clearance on takeoff. The brace helps to hold this angle.
They are 18 inches long and weight 1 5/8 oz with rear landing gear. Use the planes forward gear without wheels for the forward mount. Gear can be secured with short pieces of wire insulation.
The float spacing is 7 ½ inches center to center with spreaders made from skewers. The step is the main reference point. When complete the center of gravity of the ready to fly float plane should be about ½ inch ahead of the step. The location of the foreword landing gear attachment determines this. It came out to 2 1/8 inches ahead of the step, but check this location before gluing in the mount.
The wing should have about a 4-degree angle of incidence with the floats resting ‘on step’ (for symmetrical wings like the Edge). Adjust this by the height of the rear landing gear. Attach rear gear with Velcro for easy float removal and change back to wheels.
Cover the bottom of the floats with packing tape to reduce water friction and to help strengthen the floats.
12# monofilament fishing line works to brace the floats front to rear (see picture) to stiffen up the mount.
The floats work well and hardly affect the performance of the plane. It is still capable of 3d aerobatics.
Below are pictures, a video and instructions for the floats.
These floats are based on a design by jimsp for the Champ. They are scaled up to 18 inches for the Edge.
Floats are made from 1/8” foam board from Dollar Tree. The 7 pieces and brace are cut, and the paper backing is stripped from both sides. The pieces are glued together as the attached drawing shows with glue such as Gorilla Glue or another waterproof glue. When dry, sand to final shape.
The back of the floats (behind the step) are angled up ½ inch for water clearance on takeoff. The brace helps to hold this angle.
They are 18 inches long and weight 1 5/8 oz with rear landing gear. Use the planes forward gear without wheels for the forward mount. Gear can be secured with short pieces of wire insulation.
The float spacing is 7 ½ inches center to center with spreaders made from skewers. The step is the main reference point. When complete the center of gravity of the ready to fly float plane should be about ½ inch ahead of the step. The location of the foreword landing gear attachment determines this. It came out to 2 1/8 inches ahead of the step, but check this location before gluing in the mount.
The wing should have about a 4-degree angle of incidence with the floats resting ‘on step’ (for symmetrical wings like the Edge). Adjust this by the height of the rear landing gear. Attach rear gear with Velcro for easy float removal and change back to wheels.
Cover the bottom of the floats with packing tape to reduce water friction and to help strengthen the floats.
12# monofilament fishing line works to brace the floats front to rear (see picture) to stiffen up the mount.
The floats work well and hardly affect the performance of the plane. It is still capable of 3d aerobatics.
| Edge 540qq 280 on floats (2 min 8 sec) |
Build Blog P 19
Really on the home stretch now, shower cabin assembled and installed, remainder of bathroom furniture arrive next week and we have had a bit of a windfall so can order up the landscape works.
I hope P 20 will be my last entry (on this particular topic anyway).
I hope P 20 will be my last entry
(on this particular topic anyway).
Cubic wing loading ... credit to "Griffin"
Alaska asks: Wing loading -vs- plane size
I know that wing loading is an important factor in the way a model flies. Does model size enter into it? Suppose I have a 36" span plane and a 72" span plane, both with wing loadings of 16 oz/sq ft. Will they have approximately the same flying characteristics? (given a similar airfoil, power / weight ratio, etc)
Griffin replies: To get a cubic wing loading of 6.5 on the smaller plane to match the larger, you would need to get the weight down to 12oz and have a wing load of 8oz. In theory, the two planes would look like they are flying at the same speed, and they would stall at a relatively similar airspeed. It's not a perfect system of course, but it is about 200 times more helpful than wingloading....
-Steve
PS, figuring cubic wing loading can be done on a calculator, but I like to cheat and use this great on-line calculator:
http://www.ef-uk.net/data/wcl.htm
I know that wing loading is an important factor in the way a model flies. Does model size enter into it? Suppose I have a 36" span plane and a 72" span plane, both with wing loadings of 16 oz/sq ft. Will they have approximately the same flying characteristics? (given a similar airfoil, power / weight ratio, etc)
Griffin replies: To get a cubic wing loading of 6.5 on the smaller plane to match the larger, you would need to get the weight down to 12oz and have a wing load of 8oz. In theory, the two planes would look like they are flying at the same speed, and they would stall at a relatively similar airspeed. It's not a perfect system of course, but it is about 200 times more helpful than wingloading....
-Steve
PS, figuring cubic wing loading can be done on a calculator, but I like to cheat and use this great on-line calculator:
http://www.ef-uk.net/data/wcl.htm
Another 3 axis idea
Basically, you need a table of some kind for each camera axis
imu2 roll
imu2 pitch
|
|
V
table
|
|
V
motor 1 PID gains
motor 2 PID gains
motor 3 PID gains
The outputs of the 3 sets of PID equations for each motor are summed to get the motor steps. The hard part is computing the table. All 3 motors have a unique set of gains in the upright position. They have completely different gains in the 2 sideways positions.
There are 2 mane gradients for the PID gains: The roll & yaw motors trade places as imu2 pitch goes from 0 to 90. The yaw motor is replaced by the pitch motor as imu2 roll goes from 0 to 90.
The 2 mane gradients aren't linear. They're a sine wave. When IMU2 is pitched 20 deg over, it adds just 12% of the roll. When it's at 45 deg pitch, it adds 50% of the roll. When it's at 70 deg pitch, it adds 88% of the pitch.
If each motor has 3 sets of gains: the upright yaw, 90 pitched yaw, & 90 rolled yaw, each set of gains has 3 parameters: P1, P2, D2, a total of 27 values need to be manually tuned. The best way to tune it is to tune the fully deflected states.
Only 1 guy outside a corporation ever got the yaw coupling to work:
But it was still unstable when the pitch & yaw motors were parallel. Having 2 motors share the same axis is a buster. You want yaw to be stabilized as much as possible, until the yaw motor is sideways. It requires gradually taking away more & more latitude from 1 of the motors until it's rigid. The easiest solution is to always have the pitch motor control 100% of pitch, with the yaw motor tapering its gains in the yaw direction as it goes horizontal. This doesn't maximize all the available degrees of freedom of the motors.
Without the brute force kinematic search, the table has the motors fighting each other. Doing the brute force search fast enough would be real hard. No-one has tested a Zenmuse to these extremes, but it probably does it right.
imu2 roll
imu2 pitch
|
|
V
table
|
|
V
motor 1 PID gains
motor 2 PID gains
motor 3 PID gains
The outputs of the 3 sets of PID equations for each motor are summed to get the motor steps. The hard part is computing the table. All 3 motors have a unique set of gains in the upright position. They have completely different gains in the 2 sideways positions.
There are 2 mane gradients for the PID gains: The roll & yaw motors trade places as imu2 pitch goes from 0 to 90. The yaw motor is replaced by the pitch motor as imu2 roll goes from 0 to 90.
The 2 mane gradients aren't linear. They're a sine wave. When IMU2 is pitched 20 deg over, it adds just 12% of the roll. When it's at 45 deg pitch, it adds 50% of the roll. When it's at 70 deg pitch, it adds 88% of the pitch.
If each motor has 3 sets of gains: the upright yaw, 90 pitched yaw, & 90 rolled yaw, each set of gains has 3 parameters: P1, P2, D2, a total of 27 values need to be manually tuned. The best way to tune it is to tune the fully deflected states.
Only 1 guy outside a corporation ever got the yaw coupling to work:
| 3-axis Brushless Gimbal 0411 tuning PID (0 min 46 sec) |
But it was still unstable when the pitch & yaw motors were parallel. Having 2 motors share the same axis is a buster. You want yaw to be stabilized as much as possible, until the yaw motor is sideways. It requires gradually taking away more & more latitude from 1 of the motors until it's rigid. The easiest solution is to always have the pitch motor control 100% of pitch, with the yaw motor tapering its gains in the yaw direction as it goes horizontal. This doesn't maximize all the available degrees of freedom of the motors.
Without the brute force kinematic search, the table has the motors fighting each other. Doing the brute force search fast enough would be real hard. No-one has tested a Zenmuse to these extremes, but it probably does it right.
Wot4 Foam-E Fun at the RC Hotel
Messing around with foam Wot4's at the RC Hotel in Corfu. All are completely standard. The only mod was to remove the Y lead and plug the ailerons into seperate channels to facilitate flap mixing and differential adjustment.
https://www.youtube.com/watch?featur...&v=rb41OwUw83Y
https://www.youtube.com/watch?featur...&v=rb41OwUw83Y
F125 Pitts 50CC
F125 Pitts 50CC www.zyhobby.com
Wing span :74 in/1880mm ;
Wing Area :112 sq.in;
Fuselage Length:72in/1829mm;
Flyingweight :7700-7900g;
Engine :50cc Gas
Radio : 8Channels 9-10servos
Wing span :74 in/1880mm ;
Wing Area :112 sq.in;
Fuselage Length:72in/1829mm;
Flyingweight :7700-7900g;
Engine :50cc Gas
Radio : 8Channels 9-10servos
M055 EDGE-540 55" Special price $119
www.zyhobby.com
M055 EDGE-540 55" Oracover film& CF Version
Wing span:48.8in/1240mm;
Wing area:30sq.dm;
Length:48in/1220mm;
Flying weight:1200g;
Radio:6channels 4servos;
Outrunner brushless motors,
Carbon Landing Gear;
M055 EDGE-540 55" Oracover film& CF Version
Wing span:48.8in/1240mm;
Wing area:30sq.dm;
Length:48in/1220mm;
Flying weight:1200g;
Radio:6channels 4servos;
Outrunner brushless motors,
Carbon Landing Gear;
FPV with X8 at sunset
| Zujak leti u sumrak - X8 (1 min 17 sec) |
I wanted a foamy flyer, but I'm thrifty
To many warm sunny days has made it a difficult choice on finishing my winter projects. But last week I spent a few hour in the shop, cleaning out the remains of way to damaged stuff to salvage.....and built my first hybrid-foamy. I have been watching guys at our field have a lot of fun with these big lightweight
Foamy planes. But I guess I'm kinda cheap, I would rather spend my hobby dollars on batteries or tools or a more real plane. Anyway my old Reactor has been given life again, sans the landing gear. It never worked very long anyway, so I left it off. I cobbled together a foam sandwiche for the body and used my old tail and wings, plus some old helicopter electrics and will Maiden it on Sunday:
Foamy planes. But I guess I'm kinda cheap, I would rather spend my hobby dollars on batteries or tools or a more real plane. Anyway my old Reactor has been given life again, sans the landing gear. It never worked very long anyway, so I left it off. I cobbled together a foam sandwiche for the body and used my old tail and wings, plus some old helicopter electrics and will Maiden it on Sunday
:
Storm OSD mod
1/18 Scale Brushed Buggy
Features:
2.4G radio system with 3-1 combo(servo,receiver,ESC);
4WD with Shaft drive system;
Metal diff gears, durable even with brushless system;
Front Universal Shafts;
Big bored oil-filled shocks;
Brushed RTR with wall charger,370motor,7.2V battery pack and 2.4G system
2.4G radio system with 3-1 combo(servo,receiver,ESC);
4WD with Shaft drive system;
Metal diff gears, durable even with brushless system;
Front Universal Shafts;
Big bored oil-filled shocks;
Brushed RTR with wall charger,370motor,7.2V battery pack and 2.4G system
OS 33GT with ES35G composite pipe
Here is a video of my 78'' Extra with OS 33 on a pipe swinging a Vess 20B.
| 78 extra with os33 on tuned pipe (6 min 40 sec) |
Seattle HLG Clinic June 16th
Are you interested in learning more about R/C hand launch gliders? Well Sunday June 16th the Seattle Area Soaring Society is host a HLG Clinic at 60-Acres park in Redmond, WA. Bring your HLG if you have one and if you don't you'll still likely to learn something.
've lined up several of the top HLG pilots in the area lined up as instructors, and we'll have break out sessions where pilots of different skill levels well be grouped so you can get help on what's been challenging you in getting to that next level.
fun starts at 9am, lunch will be provided at noon and we'll also have a swap meet at noon, so bring out the stuff you've got that needs a new home.
Best of all, did I mention it's all free:-)
There's more information on our website (seattleareasoaringsociety.com) or just drop me an IM.
Red
've lined up several of the top HLG pilots in the area lined up as instructors, and we'll have break out sessions where pilots of different skill levels well be grouped so you can get help on what's been challenging you in getting to that next level.
fun starts at 9am, lunch will be provided at noon and we'll also have a swap meet at noon, so bring out the stuff you've got that needs a new home.
Best of all, did I mention it's all free:-)
There's more information on our website (seattleareasoaringsociety.com) or just drop me an IM.
Red
