Posted by Old_Pilot | Today @ 02:01 PM | 141 Views
As mentioned below, I took Dan Sponholz's Bloody Baron, and scaled it up tp a 36" WS, larger motor, ESC, servos, and battery....and adapted it to the way I like to build.....she turned out OK.. even balances where she's supposed to
Posted by benjamin presten | Today @ 04:08 AM | 424 Views
Payne Knight Twister: Onto a slightly different genre of aviation. The Knight Twister may not look like an early 1930s design, but it actually came long before most of the other airplanes in it’s genre.

The first Payne Knight Twister, which looked almost nothing like the vast majority of its successors, was powered by a Salmson AD9 french radial of 40hp. It was a diminutive little biplane with seating for one. Or seating for half if I tried to get in one. As the Knight Twister evolved it got a more sleek landing gear, new wings, new fuselage and tail feathers and a new firewall forward. In other words, the airplane got a new airplane.

The Knight Twister developed into a somewhat standard configuration for which the plans were published. It was a tiny biplane with a wingspan of only 17 feet 6 inches. And it had a more standard bungee type gear. Firewall forward I assume was written on the plans as “any engine you can possibly find laying around” because these things were powered with everything under the sun. They got radials, inlines and opposed engines between 40 and 185hp. They were also built with wingspans varying between 15 foot 6 inches and 21 feet. Not to mention occasionally being modified for two seats somehow.

The Knight Twister was intended for racing, so naturally many of them have been hopped up to go fast. The vast majority of them look a bit like they flew through a composite shop and crashed into every fiberglass fairing in the place. So sometimes...Continue Reading
Posted by ELB Power | Today @ 02:41 AM | 442 Views
ELB Power Hard Case 6000mAh 2S Shorty Pack with Deans T Connector for RC 1/8 1/10 Scale Vehicles Car Trucks Boats(5mm Bullet)
Posted by GEMFAN ts | Today @ 01:53 AM | 557 Views
Gemfan New 5.2 Inch Freestyle and Racing Props are finally out!

Thank you Shlomo Dallal for your request for 5.2 inch props one year ago, and Thank you Bob Roogi for providing such great input and help of the testing again and again in the last few months.

Freestyle 5226— for higher cruising speed and higher efficiency on higher weight quads.
Racing Hurricane 5236—faster, more aggressive and powerful than normal 5/5.1 inch.

Both fit on almost all the 5 inch frames on the market.
Try them, and they will give you some new flying experiences.
Posted by mintie | Today @ 01:08 AM | 505 Views
Had a bit of time lately so back onto the miles. Into the covering now and coming along quite nicely . Some parts are a bit slow and fiddly but are working out .
Posted by phil alvirez | Yesterday @ 10:22 PM | 1,697 Views
this is dedicated to those who are interested in improving their knowledge on aerodynamics. it is a science that has been applied also to model airplanes.
but is has been discovered that there are some laws that dont apply so well. and took some time and research to learn that indeed, there are laws that are specific for models.
and this is easier to understand by following the next:

Reynolds Number (Re)-A simplified approach.

There is a difference in performance of a wing, depending mainly of its size (chord) and speed, and Osborne Reynolds managed to put that together in an equation that lets us predict its behavior.
In charts that show the lift and drag, the curve changes depending of the Re. The stall, the max lift and drag happen at different angles of attack, and the efficiency changes, too.
There are several ways to determine the Reynolds number. A simplified way is if we multiply the wing chord (in feet) by the speed of the plane (in ft/sec), and then divide it by 0.000157
If we know the speed at which certain airplane is flying (and its chord), we can calculate its Re with this equation (and that speed can be measured with a device called ‘How Fast’).
Now we are ready for this:

Making sense of it all.

I am presenting this to be analyzed by everybody, and then each one to decide if it makes sense to him.
From the beginning of the 20th Century, there was great interest in flying, and in Germany there was a scientist who believed that aeromodeling...Continue Reading
Posted by benjamin presten | Yesterday @ 06:01 PM | 3,105 Views
Cessna T-50: Speaking of radial Cessnas, you may be more familiar with the T-50 being called the “Bamboo Bomber” or “Crane”....... Or “Bobcat”, the UC-78, the AT-17 or about a dozen other names. But they’re all from the same T-50 family.

The T-50 is of mostly wood construction with the internal steel tube fuselage being the only major metal structure in the airplane. The airplane was powered by twin radials, either Jacobs or Lycomings depending on the specific variant. It had a retractable gear that’s main wheels stayed half-way protruding from the engine nacelles when retracted. Which allowed them to still roll and keep the belly of the airplane off the ground in the event of a gear up landing.

The T-50 was the first twin engine design from Cessna as well as the first with retractable gear. Making its first flight in 1939, the intended role of the T-50 was a light twin for the civilian market. But it found itself being used a lot more as a multi-engine trainer for militaries.

By the end of WWII, Cessna had built over 4600 of them for the US military and another 822 for the Royal Canadian Air Force. These were used to train the vast majority of the bomber pilots that came from North America. Almost anyone that wound up flying a B-17 or a B-25 or any other american bomber during the war was put through a “Bamboo Bomber” at some point in their training career.

While the military did dominate the market for the T-50, plenty did make it into civilian hands. Even...Continue Reading
Posted by VicT | Yesterday @ 05:40 PM | 3,113 Views
I usually repair foamies with CA and fiberglass cloth or clear tape depending on the situation. I paint the cloth white to hide the weave and it works. For the wing saddle area I did not want to spend the time to glass the outside of the fuse so used 1/32 inch thick plywood. A 12 x 6 inch piece cost $1.85. A 250 mm x 15 mm piece was cut for the left side and duplicated for the right side. A box cutter was used to slice 17 mm deep into the wing saddle from the leading edge to behind the trailing edge. The ply was used to enlarge the slot so when pushed into the slot it was totally concealed with no interference with the wing bottom. Both ply pieces weighed 3 grams each. I imbedded both pieces into the wing saddle and used medium CA to secure them to the foam. Thin CA might be better. The fuse is much stiffer and the flexing is gone from the leading edge to the fin area.
Posted by kopterheld | Yesterday @ 03:26 PM | 3,214 Views
The GEPRC GoPro 8 camera uses the GoPro Labs firmware and thus it is possible to make all settings via a QR code. All Protune settings are possible, as well as new functions such as auto recording via gyro, maximum shutter angle, chapter with 12GB

Video (EN subtitles) - Setting the GEPRC GoPro 8 with QR Codes -
GEPRC GoPro 8 mit QR Codes einstellen - Autorecord - Protune (6 min 16 sec)



Image 1 - Geprc Naked GoPro Hero 8 can read QR code

GEPRC Naked GoPro Hero 8 Full Camera BG Code: BGGPRO8 - https://www.banggood.com/custlink/G3DYOsWRQA
GEPRC GoPro Case
AE - https://s.click.aliexpress.com/e/_98wfEd
BG Code: BGDAVIS - https://www.banggood.com/custlink/vGKyOMrEPo
GoPro Labs Hub - https://community.gopro.com/t5/en/Go...gs/ta-p/603196
12GB Chapter - The video is only split longer after 12GB instead of 4GB - https://gopro.github.io/labs/control/chapters/

QR code for all settings - https://gopro.github.io/labs/control/custom/


Image 2 - No update works without the original GoPro battery

...Continue Reading
Posted by coreman | Yesterday @ 02:16 PM | 3,312 Views
40" RA Cores Extra XL (3 min 59 sec)


Check out our new 40" EPP Extra XL kit and accessories

The instructions are up on the website if you get curious. KF4 airfoil

Posted by jmxp69 | Yesterday @ 12:54 PM | 3,330 Views
Learn EdgeTX Navigation, and take a tour of the new widget options coming our way on the newest opensource firmware for your radio:
EdgeTx • Navigation, Tips, Tricks and What's Coming Next! (1 hr 20 min 10 sec)

Posted by Dave Eichstedt | Yesterday @ 07:38 AM | 4,425 Views
I've been flying R/C since jr. high, which is back when you might still have heard an occasional disco song on the radio. In all that time I've never entered a contest of any kind. I have organized several events - some of them quite large - but I've never actually competed. I've always wanted to get into scale competition, but have never taken the plunge. I guess hanging out with people like Ron Gilman in the early 90s and David Ribbe & Peter Goldsmith in the 2000s and seeing how well they fly was kind of a de-motivator. They're such awesome pilots, how could I ever compete with the likes of them? All three have won Top Gun!

I recently took stock and realized that I'm not getting any younger. If I am to get into scale competition, I need to start soon so I can start building experience. Learn how to present the aircraft in the sky. Be smooth on the sticks. Learn from other competitors and have some fun. So, in a moment of weakness and with zero fear, I signed up for the 2021 AM RC Fixed Wing Scale NATS, with the intent of flying Beaver prototype #1, my trusty electric-powered bird.

I practiced every weekend for about a month before the event. I tried three different versions of the maneuvers. I worked on smooth inputs, especially on aileron, and I flew at three different flying sites trying to find one that was similar to AMA Site #4 at the National Flying Site. One of those days I tried to fly at site 4 itself, but unfortunately there was a large...Continue Reading
Posted by Old_Pilot | Yesterday @ 07:12 AM | 4,670 Views
Just finished taking, and passing the TRUST Test....As it turns out, all the pushback on this subject is no more than a tempest in a teacup.

(23) multiple choice questions about how, where, and when we can fly for recreation....basically common sense and courtesy.....took about 15 minutes...
Posted by Tazkiller85 | Yesterday @ 05:09 AM | 5,328 Views
Yep Les Amis,
Agréablement surpris par la qualité et le rendu ! J'ai en test depuis quelques jours le MAGIMASK de chez MoviMask. Après avoir testé quelques vidéos et applications de réalité augmentée, je me suis intéressé à son utilité dans notre hobby. On va, en effet, pouvoir non seulement partager les images HD de notre masque DJI grâce à l'application DIGIVIEW Alpha mais on pourra également visionner le retour vidéo de nos engins de prise de vue type DJI mavic, air ou autres, à condition bien sur d'avoir le câble USB adapté. Donc un gros plus dans notre activité, à titre personnel ou pour du partage ! D'une excellente qualité de finition et acceptant toutes tailles de smartphones, un très bon investissement selon vos besoins... Prenez soin de vous et merci à tous pour votre soutien .

MAGIMASK DJI en immersion et partage numérique - Review Test Démo - Léger et confortable ! (12 min 44 sec)


NOTATAZ : 17/20 Utile et efficace !!!

- MAGIMASK (108€) : https://moviemask.io/products/magimask?aff=11
(Vous aurez besoin d'un câble de données type OTG)
- Adaptateur câbles OTG : https://amzn.to/3vQnNFE
- Quelques appli de Réalité Augmentée : https://bit.ly/3zRisAT
- Vidéos AR sur Youtube : https://bit.ly/3gPoWsJ

- TABLEAU DES PROMOS ET COUPONS 2021 RC et ACCESSOIRES (remis à jour quotidiennement, en utilisant ces liens, vous aidez la chaîne, ) : http://bit.ly/2OiQMPF

- Si Vous voulez aider la chaîne avec un don (tous les dons...Continue Reading
Posted by cuavlindy | Jun 22, 2021 @ 09:05 PM | 11,683 Views
CUAV support for GuangZhou patrol scheme.
Posted by Reckless_fpv | Jun 22, 2021 @ 07:32 PM | 11,898 Views
Posted by unboxingexp | Jun 22, 2021 @ 12:05 PM | 12,118 Views
For me, this is one of the best invention in FPV since years. The Immersion RC Ghost Hybrid 5.8GHz vTx/2.4GHz RX gives you a high end analog video transmitter and high RC control link - all in one board.
Immersionrc Ghost Hybrid (4 min 6 sec)

Posted by aopen3434 | Jun 22, 2021 @ 07:02 AM | 13,286 Views
New product this week :
Go1 Quadruped Robot Personal accompany and life care robot
Unitree Robotics Go1-edu Quadruped Robot Personal accompany and lifestyle robot! (0 min 9 sec)

http://brushlessgimbal.ca/RTF-Ready-...ife-Care-Robot

The difference between Go1 and A1:
1. The Go1 edu version is the product that is benchmarked against A1.
The cost performance of the Go1 edu version is better than that of A1.
2. The shipment of the Go1 series may later than October (Unitree has
started accepting reservation, more early you ordered, more early we
can ship), while the A1 series can be shipped within few days.
3. Go1 air and Go1 do not support secondary development
Product Details
Product: Go1
size folded:0.588X0.29x0.22m WEIGHT:12KG
Payload: 3kg-6kg
Ultrasonic Sensors:3
RTT 1 Transmission:1
Processor:1*(4*1.43GHz 128Core 0.5T) (16core CPU + GPU384Core,1.5TFLOPS)
or Nvidia 1Nano +(2 Nano or 2NX) Go1-EDU only
Power Adapter: 24V, 4A - 24V, 6A
speed: 0-2.5ms, 0-3.5ms, 0-3.7ms
Graphic Processing API (OTA):CPU 4core GPU (256core, 1.3Tflops)or(GPU384Core,1.5TFLOPS) HAL 1 Human Recognition:1
Lidar 2D or 3D: Go1-EDU only
foot force sensor: Go1-EDU only
Research Programming API:Go1-EDU only
warranty parts and labor 3 to 6 months or parts and labor 6 to 12 months
To put it simply, Go1 edu version is a continuation of A1

find at :

http://brushlessgimbal.ca/

Unitree Robotics Go1 Quadruped Robot Personal accompany and lifestyle robot (0 min 8 sec)

Posted by kopterheld | Jun 22, 2021 @ 06:55 AM | 13,395 Views
At first look, the 4-inch Eachine Shadow Field looks pretty good and with the coupon code: BG30SD4 you can get it for under 215 USD with DJI Vista.
The Long Rang Quad flies very well and with a long flytime. The modern 1404 2750KV motors have good, curved magnets. The HD version with the Caddx Vista is even available with the original DJI camera. The ESC's have 20 amps and the quad weighs only 158 grams. Unfortunately, Eachine has installed two bad components here, such as the F4 flight controller, which has a defective voltage sensor, and the GPS module with poor reception.

F4 STM32F405 flight controller
The F405 FC has enough serial interfaces compared to an F411 FC. But you can only use two serial interfaces with RX and TX Pad. Both interfaces UART1 and UART5 are already used with the Vista and GPS module. So you can't easily install a Crossfire or ExpressLRS receiver here.

image 1 - Here the repaired voltage regulator with the correct R2 1K resistor

The much worse thing is that you get the wrong voltage displayed on the F4 FC board. So you fly with a battery where you don't know how much voltage is on the battery. After a calibration of the voltage sensor, the correct voltage is initially displayed by a 4S battery, but if you connect a 3S battery, the voltage display is no longer correct at all. I checked the F4 board and I found out that the voltage sensor on the board have wrong resistors. The voltage sensor is on PC1, which is correctly assigned under resources (...Continue Reading