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Posts Tagged ‘flight’

Maiden flight of a 6 (six!) meters span Piper J3 Cub made from scratch in Portugal

May 22, 2011 Leave a comment

It’s a pleasure to showcase here a friend’s project that finally came to life… it’s a HUGE Piper J3 Cub (55%), perfectly built.

The maiden flight was piloted by the great Pedro Precioso, as he’s simply the best pilot we all know. We use to say that in his hands even a rock can fly… ๐Ÿ™‚

Here’s the maiden video and, as you’ll see, the Piper flies beautifully!

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Insane 3D Heli Flight by Alan Szabo Jr with a Raptor

July 23, 2010 Leave a comment

Hey mates! I’m really trying to come back to the long and technical posts, but time is being hard to find.

Anyway, to keep your appetite, heres’ an amazing video where Alan Szabo shows a great demonstration of 3D Heli Flight. He really pushed the limits here! Hope you enjoy it.

Categories: Videos Tags: , , , , ,

Awesome Aerobatic 3D Flying at the 2010 RC AirShow!

July 19, 2010 Leave a comment

Hi folks! Sorry for not writing for a few days, but i’ve been quite busy – flying and working to feed the addition! ๐Ÿ™‚

Just came across an amazing 3D aerobatic flight video and would like to share it here. It’s truly a great flight and all due to the pilot skills. I hope one day i can do half of that…

Hope you enjoy it! I’ll come back soon with more interesting stuff…

Fly safely!

Getting Started on RC Helicopters – Part 5 (Gyros Explained)

So you’re new to radio controlled helicopters and you start to hear about gyros. Wondering what they are, what are they used for or even how they should be used? This post will clarify everything about gyros and i hope in the end you will have a better and clear idea about them.

The purpose of the gyro is to stabilize the tail. Without it, the model would be almost unflyable. Early gyros had a motor and two flywheels inside and at the time worked quite well but they are no match compared to more recent piezo gyros, which have no motor, but use an electronic sensor instead.

Piezo Gyros

Modern piezo gyros have never been so good and are no longer an expensive alternative but an essential part of the radio system. Modern peizo gyros can cost anything from $50 to $400. So how much should you spend and which one should you buy?

Well at the lower end of the scale, the gyro will be single rate, adjusted on the gyro itself and will not have pilot authority. At the top of the range, it will probably be dual rate in both normal and heading lock mode (sometimes called heading hold or AVCS), selectable from the transmitter, and it will also have full pilot authority.

Modern piezo gyros have a very fast response and will need a servo that can keep up with the gyro output. Servo speed is measured by the number of seconds it takes for the servo to turn 60 degrees, so a digital servo with a speed of 0.12s/60 to 0.08s/60 is the ideal but you will have to pay around $70 to $150 for it.

Gyro Gain

The best way to adjust gyro gain is to turn it up until the tail wags in forward flight and then turn it down a little. You should be able to get near 100% gain. If you can’t, then try changing the length of the rudder servo arm. There is no point in spending serious money on a good gyro and then only using 50% gain.

Pilot Authority

On a standard gyro, when you input a rudder command the gyro will try to correct the tail back to the centre. The higher the gain on the gyro, the less tail authority you will have.ย With pilot authority, the gyro gain decreases as you input commands so you can have 100% gyro gain and still have full tail authority.

Heading Lock

With the gyro in normal mode, the tail will weathercock to some extent so when flying circuits or hovering in to wind the tail will tend to follow the line of the model. In heading lock mode, the tail stays wherever you put it, so it is quite easy to fly the model sideways or backwards at speed without losing the tail position. The only downside to heading lock mode is that you have to steer the tail all the time as it will not naturally follow the model. And if you enter a maneuver, say a loop, with the tail offline it will stay offline throughout the maneuver. If you are not sure which mode the gyro is in, with the radio on and without the engine going, move the rudder control fully to one side: if heading lock is selected, the servo will stay at one end until you move the stick back to the other side.

Mixing Makes

I have used Futaba, JR, and CSM gyros on JR radio systems with no problems at all. Anyhow, i advise you to use a matching rudder servo in the case of JR or Futaba, as they were designed to work with their own servo.

Aerobatic Maneuvers – Part 6 (Immelman)

We’re back to this series on Aerobatic Maneuvers. If you did not follow previous posts, you can check all of them at the R/C Technique category.

Now we’ll focus on the “Immelman” maneuver.ย The figure starts with a half loop to inverted flight. A half roll then results in horizontal upright flight.

Immelman
Immelman

This is one of the maneuvers that have been used in WW I to reverse direction. This maneuver does not preserve speed and altitude. It trades speed for altitude.

RC Helicopters – Getting Started (Part 1)

May 4, 2010 1 comment

I’ve been focused mostly on fixed wing planes until now. But this blog will cover all kinds of radio control flying machines, so i will work along the helicopter fans too – i fly both planes and helis.

RC Scale Helicopter

RC Scale Helicopter

On this first post, i’ll cover the most frequently asked questions beginners usually have when getting into helis. Ready to go? So let’s move on…

What brand helicopter should i buy?

Most of the helis on the market today are good. With any helicopter the good experience you have is almost entirely proportional to how well the helicopter is built and setup. That is why it is so important for people starting out to get help from someone that understands how to best set one up for the flight level you are at. I see this all the time. Just the other day i saw someone with a JR Venture and it was in need of a little help. The guy was having problems with the helicopter not lifting off the ground. This heli has eCCPM and I found that two of the servos were hooked up in the wrong positions. After getting this straight (it was causing the top end pitch to unexpectedly change) then I did my normal setup for throttle curve and pitch curve. I flew it and got the blades in track then set the tail to feel nice. After a half of tank of adjusting I handed the controls to the guy and after this he flew one circuit and kept saying this helicopter has never flown like that before… That made me feel good and is the reason I try to help others .

The point is no matter what helicopter it is, how well they fly is dependent more on how well they are assembled and setup. For me the determining differences between one helicopter versus the other are in how easy they are to work on, how easy it is to get parts, price of parts, and price of kit. And if you have other heli pilots in your area that you plan on getting help from then you should get something they have experience with. Talk to them about the helicopter you are looking at to purchase and make sure they can help you with it.

Amazing 3D Heli flight by Tareq Al Saadi (UAE)

This guy has a natural gift and is a highly skilled RC Heli pilot. Probably one of the best (if not THE best) RC heli pilots inthe world!

Here you can see him flying his Outrage Velocity 50 nitro heli doing amazing maneuvers. Watch out for the fence on the right… ๐Ÿ™‚