R/C Blogs - Page 101 - RC Groups
Posted by Jack Crossfire | Aug 13, 2017 @ 09:40 PM | 2,002 Views
The 'pro got extremely hot when recording 1080p 120fps. An attempt was made to cool it from behind, but the heat manely comes out of the user interface panel. This clocked in at 40C, slightly below the Samsung. Fortunately, the sun will be manely obscured when it's running.


Having spent a day building a filter box because the filters were made of cardboard, the decision was made to wrap the Samsung in a towel for transport. Its original packaging didn't survive the lion encounter.


Testing magic lantern revealed its 10 step bracketing + full speed intervalometer are key players. The intervalometer fires the complete bracket sequence over & over. Can't think of any Japanese camera with this functionalty to this day, but no-one is still using it. The trick is the trash button starts & stops the intervalometer. The 5D support is limited to only 9 steps & it always says 2 second delay is enabled, but 9 steps might be just enough & it doesn't seem to invoke the 2 second delay.


Auto exposure bracketing won't work because it can end up pushing the longest exposures to over 5 seconds. It could end up with only 1 pass. The range has converged on F5.6 ISO 200 1/100 to 2.5s in 1 stop increments for the 5D or 1/100 to 5s for the Mark III, but it's all based on mreclipse.com.


The selfie shots have emerged as the most important. With any luck, the 5D will get 5 passes through the 9 stops, manely limited by CF card speed. The iPhone will get 4k video from below & the Samsung will get video from above. The lack of space means all the shots will be behind the lion. The cameras all have to be facing away from the car & the Samsung is stuck to the car.
Posted by XB | Aug 13, 2017 @ 09:25 PM | 2,487 Views
Cinetank MK2 L video build and test compilation. I'm finally almost there, for what I want, this is a challenging build.

Cinetank MK2 L Build, Mod, Repeat ARF Compilation (3 min 7 sec)

Posted by phil alvirez | Aug 13, 2017 @ 05:47 PM | 4,299 Views
as i fly at dawn, sometimes i find fog, and just look around until it clears. and have noticed something that havent heard of. at certain moment, at the west, i notice a bow similar to the rainbow, about same size, but just white. it appears slowly, and some time after it vanishes. it is not very strong, but is easy to see.
it happens shortly after the sun begins to show through the fog.

i hope some1 brings any data or a link to it.

i think that we will never learn all about the weather, after all...

edit: just got a link. and is called fog bow. see: https://en.wikipedia.org/wiki/Fog_bow
Posted by Jack Crossfire | Aug 13, 2017 @ 04:21 PM | 2,371 Views
A new filter & case for the 2 filters was fabricated. In the unlikely event another camera materialized, its filter would be just for focusing. It was a bit sturdier than the 1st filter. In old age, it 's disappointing how the obvious way something should be designed is now completely foreign in the 1st iteration.
Posted by Woodinthesky | Aug 13, 2017 @ 01:40 PM | 2,805 Views
Heres the code for the sale over at thunder power rc to get 20%off your order
FLASHAUG
Posted by Fourtech | Aug 13, 2017 @ 12:51 PM | 1,950 Views
Arguing on the internet is like wining the special Olympics, you might win but you are still a retard.

Enjoy the fight for your freedon to fly rc, you are on your own.
Posted by Wrangler1 | Aug 13, 2017 @ 12:13 PM | 1,994 Views
Here i am, building a substitute of my great H9 T-34 Mentor that i crahshed a few months ago, it was 10 years old, a great flyer and sturdy in it's construction. Well since that aircraft is no longer produced, i do a research and found that Vinh Quang was preparing to launch a new version of the T-34, this one with the nacelle of the T-34C "Turbo mentor", so i called VQ Warbirds to see when they were planing on get it. I put a Pre-Order and as soon they received the shipment they called me and verify my address and 3 days later the ring bell sound !!!!.

I look at the box and said to myself, ohhh yeahh, but as soon as i opened it, i said " S%^t" this isn't the plane that i ordered, it's the old yellow version !!!!!!!, now i have to call again to VQ Warbirds, but i decided to open the box, for my surprise the new version was inside,... inside the old version box !!
Posted by Fidy$Trainer | Aug 13, 2017 @ 10:52 AM | 1,795 Views
So you want to make the ultimate 4S 11xx 2"-3" Screamer here is how at a high level. I'll provide the gotcha's I ran into with this build. I will say it's a great frame but it does have a few issues especially with the components that I selected.

What constitutes the ultimate micro? Well for starters it must have the following basic components, Buzzer, LED, 20A+ ESC, OSD, Quality motors, Truly capable of 4S and most importantly a CCD Camera like the RunCam Micro or Foxeer Micro. This has been the biggest advancement in Micro drone technology in over a year. Now as you would expect this quad is going to cost considerably more than your standard eachine Lizard 95 or other out of the box. The difference is reliability and quality. As long as you incorporate this methodology into your own custom build you will also have your own ultimate Micro.

First thing first. If you want to build an ultimate micro you will have to start with good quality parts the ONLY. The only part I would use from Eachine parts bin is the VTX03 and only because it's switchable. I would not say it's all that great but we dont have a lot of options in the Micro world.


MOTORS: RCX 1304 5000kv http://www.myrcmart.com/rcx-h1304-50...g-p-10009.html
$11.99 per $36
I'm undecided about the motors. They seem to get pretty warm on 3S. I dont have enough flights on 4S yet to decide. On 4S it's a friggen monster. On 3S it's still very quick.

I would say of all the cheapie motor's I've tested...Continue Reading
Posted by d0uglas | Aug 13, 2017 @ 09:52 AM | 2,705 Views
During an early morning flight when no one was around I lost my signal or the receiver malfunctioned barely a thousand feet from me. Failsafes kicked in which kept the plane inside the park, not sailing into town, with a pretty wild landing:

RC Flyaway: Tragedy Narrowly Averted by Failsafes (2 min 36 sec)


As for the culprit, I range tested it and on low power it failed at 15 paces. I remembered I had added a capacitor to the receiver that came with the flight controller I had been using, I guess it's supposed to mitigate the risk of brownouts from power surges. I removed it and it range tested beautifully.

But to be safe, in case it were something else, before I fly the plane normally I will instead fly at low altitude early in the morning out to sea as far as I can and just do full throttle laps for at least several batteries, including raising the flight controller rate gains to induce oscillation to shake things up, so that if there's a flyaway I only lose the plane rather than risk killing anyone. I figure the more times I do that without incident the more likely the plane is shipshape and seaworthy for regular flight.

Range test after doing anything either involving your radio equipment or after anything noteworthy happening to the plane, and for good measure every now and then. Also program your failsafes to put your plane in a gentle spiral, if you want my advice. This could have ended very badly in many different ways, as far as being in a flyaway goes, short of a smooth landing, I got as lucky as one can get.
Posted by eihoward | Aug 13, 2017 @ 07:07 AM | 1,958 Views
Need to know your servo spline number:

http://www.myrcbox.com/articles/tech...splines-guide/

Necesita saber cuantos dientes hay en el eje de su servo, visite el sitio al que lo lleva el enlace. Encontrara las especificaciones por fabricante.
Posted by DingoII | Aug 13, 2017 @ 04:50 AM | 1,843 Views
I have been fascinated by the EDF for some time. I came across the EDF just few months ago when I "impulsively" added the DuraFly Vampire to my shopping cart at the Hobbyking site.

I did some bits of the EDF theory (please see it attached) during my holiday (cannot just swim and drink a do nothing else ;-) ) and then also measured the Vampire performance:

Flying at full throttle (interleaved with gliding) gave 4.5 minute of powered fligth. Recharged 2610 mAh into 4S-2650. This gives about 33 A, or 520 W of input power.

Max. speed measured by GPS telemetry was about 100 km/hr (scattered between 93 and 113 km/h in several passes). The landing speed was about 27 to 32 km/hr.

Then I devised a simple U-tube differential pressure gauge. It is just a piece of tubing taped to a vertical scale. The ends of tube are then introduced into the location od interest (please see the pictures). The pressure difference across the impeller measured at full throttle was about 180 mm of water column, without the access hatch is was just about 60 mm.

Well, all this data fall within the expected range of values, and although I would not expect them to be 100% accurate, seem to confirm that the theory works.

Thanks, Jan
Posted by Jack Crossfire | Aug 13, 2017 @ 01:41 AM | 2,301 Views

Posted by Jack Crossfire | Aug 13, 2017 @ 01:35 AM | 2,214 Views

Posted by Jack Crossfire | Aug 13, 2017 @ 01:33 AM | 2,133 Views

Posted by Gimbal Guy | Aug 13, 2017 @ 12:51 AM | 2,008 Views

Posted by Gimbal Guy | Aug 13, 2017 @ 12:49 AM | 2,001 Views

Posted by Gimbal Guy | Aug 13, 2017 @ 12:48 AM | 1,900 Views

Posted by USERNAME100 | Aug 12, 2017 @ 11:47 PM | 1,606 Views