R/C Blogs - RC Groups
Posted by _AL_ | Today @ 09:07 AM | 17 Views
Not much flying lately but a bit of building.

After 15 years or more of sitting in a box waiting to be built, the Southern Sailplanes Tbird is ready to fly.
The Blur is repaired & has flown a couple of times.
The Mefisto I bought with a busted fuselage is repaired & ready to go

Tomboy built & flown several times. Now trimmed & ready to fly single channel
Pulstar almost ready to fly, also single channel....Continue Reading
Posted by RC Roundtable | Today @ 08:46 AM | 35 Views


Episode 56: "Freeze Frame" is now live!

In this episode, we are joined by RC photography guru David Hart!
We talk about:
-Horizon products now at Tower
-Updated E-flite UMX GeeBee R-2
-Terry likes SAFE!
-Meet David Hart
-David's camera tips
-David's favorite RC events
-David's best shot ever!
-Upcoming events

You can visit our website at RCRoundtable.com to listen over the web or download an MP3 of the show. Or, you can subscribe to RC Roundtable on iTunes.

We would love to read your comments and ideas. Please drop us a line here, our facebook page, or email: contact@rcroundtable.com.
Posted by old4570 | Today @ 05:27 AM | 114 Views
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Posted by AndySA | Today @ 04:57 AM | 119 Views
Hi Im on a yacht in Malaysia and the owner has a hex 20. Currently its uses a desire power, 30c 16000 (SD Series, 6S2P 22.2V 16000mAh 30C 355,2Wh).

Im looking for one more new battery and there are none like the one I have is it possible to use the same lipo battery but instead it is 6s1p and 15c because then I have found one online that I can buy?

Any help will be greatly appreciated.
Posted by GEMFAN ts | Today @ 01:57 AM | 221 Views
FLASH 5149-3

Lighter, Faster, more durable, POPO System compatible.
Designed for competition, applicable to any racing tracks.
Light weight with only 4.7g.
On the basis of 5152-3, enhance the reaction at low speed, faster acceleration with more timely braking and less moment of inertia.
On the basis of 5055-3, more flexible in operation and air control.


Colors: Clear, Clear Purple, Clear Blue, Clear Green, Clear Orange, Clear Red

Up to now, there have been many flying tests on facebook and youtube. The results are extraordinary amazing.
You can see some of them from the following links.
GEMFAN 5149-3 // Do it all prop (2 min 53 sec)

https://www.facebook.com/benjamin.za...9%3A1526881985
https://www.facebook.com/photo.php?f...type=3&theater
https://www.facebook.com/nironathani...type=3&theater

Many pilots are trying it with full of praise. If you want to enjoy the extreme speed feelings, why not try it? It will not disappoint you.
Posted by Maksimuzz | Today @ 01:09 AM | 224 Views
As mentioned earlier, it is easy to assume that a longitudinally placed gyroscope can be used to hold the roll. But I would like to check this before the plane is crashed. And I would also like to check the aircraft control algorithms. This feature is provided by the XPLANE flight simulator. Since I bought the version of XPLANE-6 in due time, I use it. Why XPLANE? It allows you to output data from the simulated aircraft sensors to other programs or computers by various means. I have chosen the UDP protocol for this. The picture shows a block diagram of the simulation complex.
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An example of one flight and an explanation of the simulator configuration and the autopilot program can be seen in the video. The video shows the various modes of flight of the aircraft and contains instructions for setting up the X-Plane simulator and the autopilot program.

4.1 PPJOY and VSPE.

To control the aircraft in the simulator usually a joystick is used. For training in the management of radio-controlled aircraft, the corresponding simulators are also used. To interface standard remote controllers with simulators, there is a PPJOY program that converts the input data stream of the RS232 interface, created according to certain rules, to virtual joystick control signals. The program also contains a driver, which is defined in the system as a joystick. Description of the program PPJOY can be found in free access on the Internet. Here you can find an application that can work with Win7....Continue Reading
Posted by ShropshireLad | Yesterday @ 10:39 PM | 475 Views
At the behest of RC Groups Royalty I am starting a new thread on the very recently announced Avios 1800mm C-130 Hercules, unveiled to the world by Stephen and Ian from Hobbyking at their PEMAC (Penrith Electric Model Aircraft Club) open day on Sunday 20th May. I was fortunate enough to be able to attend the excellent event in person and despite the frantic arm waving of Action Ram during the Live and World Exclusive Hobbyking Facebook announcement the model survived to be demo'd over several flights off PEMAC's closely mown grass strip in very light wind conditions by Ian's steady thumbs. All the best people fly mode 1
I summarise here the information presented to us at the event and apologise if any of the facts I present are inaccurate or incomplete, please don't hate me. Save your ire for the (hopefully not too long ) impatient wait we have to endure before we can get our hot little hands on this (not so) little beauty.
Wingspan 1800mm, super smooth EPO foam construction.
Single 3S or 4S set up (was demo'd on 4S), 4 x 18A ESC's driving scale counter rotating props. Sorry didn't get the motor spec's, was too busy drooling.
Fat Albert (Blue Angels) and Military grey schemes will be available (military decals from several nations available, including but not limited to Australia, NZ, Canada, Netherlands). The Fat Albert livery will NOT come with jato rocket assisted takeoff (sorry to disappoint).
Detailed and functioning rear loading ramp for dropping cargo and large...Continue Reading
Posted by VicT | Yesterday @ 10:29 PM | 259 Views
If an Electronic Speed Control (ESC) fails in flight there may not be power to the receiver to operate your servos. The result will be a loss of control and possible crash damage to a person, place or thing. If the ESC fails on the ground before or after takeoff the risk of crash damage is still present but is minimized. The use of seperate receiver and servo battery power can be used or a back up pack but you will still be faced with a power off landing that might be cause damage. This is how I usually verify and validate new or suspect speed controls.

1. Measure the amp load (using a Wattmeter/ Current meter) and confirm it is below the rated amp load for the ESC. The amp load can be reduced by changing to a lower pitch prop or a smaller diameter. Reducing the cell count for example from 6 to 5 lipos will reduce the amp load.

2. Run the motor for at least 10 seconds with a prop and measure the heat of the ESC. Use an ingrared thermometer and ensure temps are less than 140 F. If you do not have one you should be able to keep your finger on the ESC for 3 seconds or more. If it hurts at 3 seconds the ESC is too hot and the resultant heat can affect or damage the internal electronic components. Increase ram air cooling and have more exhaust area than intake area. Keep the ESC from being insulated. Dont glue the ESC to the wood or foam fuselage. Keep the heat sink out in the cooling air flow.

3. For new speed controls or used...Continue Reading
Posted by 1Ironhorse | Yesterday @ 09:51 PM | 302 Views
I receied the Bowden Tube Fittings and installed one. I then printed out a Bowden Tube Fitting Clip that takes up the space between the fitting body and the release ring, it keeps the tube from shifting back and forth in the fitting. I attempeted to print out the rest of the Dayroom, but it failed twice, once by having Y-Axis shift, and the second time by pushing the support material away and also had Y-Axis shift. Y-Axis shift was first noted in my May 08, 2018 post when I noted it on the torpedo aft section print. I didn't know what it was at that point and I had not really seen it since. Long story short, I check with Thingieverse blog and discovered that the Tevo Tornado has a larger stepper motor on the Y-Axis (which makes sense since it is the motor that has to move the carrage). What was needed was to increase the reference voltage of the Y-Axis motor diver circuit from 0.8 volts to 1.25V. That seems to have fixed the Y-Axis Shift problem, but the next issue I ended up with was the Z-Axis "Home" switch got moved and drove the print nozzel into the build plate. So after a lot of adjusting the build plate, I think I have it properly placed. I had a lot of issues with prints using the White PLA, so I swithed to Green and have been getting good results since. Might just be my perception and before I got all the adjustments right. In any case, the prints are coming out much better now.

I've printed out the remainder of the Dayroom (in Green PLA)...Continue Reading
Posted by sfmthd | Yesterday @ 09:28 PM | 387 Views
i thought some (tho prolly not many, lol) might be interested in where i ended up with this.

other than some different kind of camera control in the future, i'm pretty much done with this setup. i have an idea for another copter i'm going to build based on a mix of these components, some from the graveyard of various crashes and some i'll buy/make.

here's the overall aircraft:





it's a few remaining pieces from my original s900 (hardly any, lol) plus the e1200 propulsion kit, the kopterworx top plate, and custom extended landing gear legs.

camera at the moment is a nikon d850. this is really why i built this thing - the d850 and a choice of tons of lenses cost me zero since i already had it. short of medium format, it's the best still image quality you can get. period. i've shot with the 20 f/1.8, 28 f/1.8, 35 f/1.8, 50 f/1.8, and 85 f/1.8. very easy to switch lenses, slide the camera forward or back and tiny bit, and get back in the air.

...Continue Reading
Posted by bluem6 | Yesterday @ 08:06 PM | 327 Views
Another flight controller plate/cover. The hot blue method I have been using to hold the buzzer was a little messy so something new. I really like how it came out on the BLX4 so this time it's 20x20mm for a Crusader 130mm build (will be in another blog). It's covering a PikoBLX flight controller. After a few revision I've also added a two front/back plate to house an LED. I wish I had gone with a RGB instead but maybe that will be in the next build.







TH is my initial of course lol..the buzzer is 9x5mm

...Continue Reading
Posted by kydawg1 | Yesterday @ 06:46 PM | 375 Views
Posted by Dave Eichstedt | Yesterday @ 06:42 PM | 378 Views
Here's another video, this time shot by Dr. Michael Selig, who showed up at the field just after my first flight of the day.

The video shows most of flight number 6, and includes some nice slow flight as well as a good touch-and-go between 2:30 and 2:40.

David Eichstedt DHC-2 Beaver Flight No 6 (5 min 39 sec)

Posted by Startrek66 | Yesterday @ 06:13 PM | 418 Views
This is the link to my video of the flight of this fantastic warbirds.

P51 D Gunfighter Parkzone (3 min 59 sec)

Posted by JTether | Yesterday @ 06:13 PM | 420 Views
Im starting this blog for fans of these Ohlsson & Rice Tether Cars
Please post any information, photos, stories about them
Thanks
Posted by Mad_angler1 | Yesterday @ 03:28 PM | 630 Views



The Mavic Air Waterproof Carry Case From Freewell Gear.


A few weeks ago Freewell sent me some accessories to take a look at and one of them was the Freewell Rugged Carry Case for the Mavic Air. Along side this Freewell have also released a much more substantial case costing $99 for those looking for the ultimate protection for their DJI Mavic Aircraft.





This new case from Freewell is extremely robust and is designed for those looking for total protection.
Made from XEP material its a far more substantial case than the other rugged model and it offers a massive amount of protection for your Mavic Air. It is crush proof and high temperature resistant, protecting the craft from -40˚ C to 98˚ C.
One major selling point is this case is waterproof and being IP67 rated this also effectively means it's dust-proof too protecting your Mavic and accessories from damage from all angles.



Externally


While offering tons of protection this case has been designed to be compact in size and shape. It measures only 330 mm x 285 mm x 145 mm and weights just shy of 2kg.

...Continue Reading
Posted by Pookee | Yesterday @ 02:57 PM | 585 Views
Roll holder is on the left side of the unit.
Posted by Old_Pilot | Yesterday @ 02:23 PM | 614 Views
Video of the Flite Streak......a bit of Dutch Roll and porpoising....... need to make the couple longer, and probably add an inch or so to the nose as well....she's touchy.......this flight was all on low rates (< 50% throws and > 50% Expo)...but she's fun to fly

Flite Streak (2 min 15 sec)

Posted by Doug Simmons | Yesterday @ 01:31 PM | 632 Views
Hey, so last night I was testing a string of LED bulbs, nothing too crazy, forty watts' worth, to see about how long two 1600mAh packs in parallel would keep them lit burning 40W. My nicest 1600s. Why? Never mind why. Then I'm screwing around on the laptop, up to no good, time passes, and it hits me, the LEDS are dim, oh no!, I let it run too long, packs' are probably dead! Should have used the damn power supply and a wattmeter...

Maybe you've figured out what makes you happy and are already equipped for it, but in my case, the amps and watts I need in DC from an AC source is a function of time, and for others like me, I'd say it's handy to have at least one high current AC/DC power supply. And not just for powering your chargers: If you experiment in your hangar "on the bench" with a wattmeter/thrust stand/RPM/temperature sensors etc also with, say, different ESCs, different motors and different props, or maybe you just like to lick the electricity and chart down how delightful it felt: You want a source of power that is consistent as a battery pack's voltage, and voltage sag, weakens from one ten second run to the next. Powering your plane with your power supply instead of a pack will yield better testing results. Provided, of course, the PSU can put out enough amps without dying, and without excessive voltage sag. And provided, of course, that the PSU in question won't break the bank, and the guy who sells it to you is trustworthy, based on my having bought...Continue Reading