R/C Blogs - Page 11 - RC Groups
Posted by Bad Brian | Jun 07, 2018 @ 09:00 AM | 1,009 Views
Hi guys. I recently upgraded my Baja Rey to aluminum front and rear suspension parts. The problem I'm having now is the front drive shaft is popping out of the front diff. The lower control arms are still stock so is front shocks. I can get an upgraded aluminum front differential but I'm not sure if that will solve my problem. Any suggestions on how to fix this would be appreciated. I'm thinking a little slightly longer drive shaft or stronger coil springs in the front.
Posted by JLJ | Jun 07, 2018 @ 07:43 AM | 964 Views
Fly Test 27th May 2018 (1 min 41 sec)

I'm a participant in Basic Air Data free and open project. The project provides all the necessary information and media (3D files, Kicad, etc.) to build and customize your own DIY air data system. It is included even an Android control app.
You can find here a short review
I built a unit, and it works :-)
Posted by kydawg1 | Jun 07, 2018 @ 06:58 AM | 943 Views
SUMMER Park Huck #17 (2 min 51 sec)

Posted by TechTronic9000 | Jun 07, 2018 @ 04:21 AM | 972 Views
The Syma X25W is a WiFi FPV drone is equipped with 2.4G transmitter & smartphone control. It features a 6-Axis gyro for stable control, auto takeoff and landing, altitude hold, adjustable tilt 720P camera and last but not least an amazingly well working "Optical Flow" positioning system which doesn't need GPS satellites to work so it can be used indoors also.

Available from: http://bit.ly/SymaX25W

Syma X25W WiFi FPV Drone with Optical Flow Positioning - Full Review (22 min 35 sec)

Posted by GBLynden | Jun 07, 2018 @ 04:11 AM | 851 Views
In this video you'll see Bill maiden his brand new E-flite Ultimate 2 Biplane with SAFE. Like all of Bill's flights, this one was an adventure. He shows off his significant advancement in the hobby flying this plane in some strong wind with some fantastic recoveries so this beautiful plane will live to fly another day!

Bill's E-flite Ultimate 2 Biplane BNF RC Plane with SAFE Maiden Flight With Near Crash! (5 min 8 sec)

Posted by foxtechtech | Jun 07, 2018 @ 01:57 AM | 824 Views
FOXTECH GAIA 120 Hexacopter is released! GAIA 120 Hexacopter is a new member of Foxtech GAIA series drone.

GAIA 120 features small volume, simple structure, high strength and high efficiency. The specially designed fuselage and full carbon fiber structure make the drone light and sturdy, even more durable than GAIA Elite version. And the whole body features an advanced aerodynamic design and performance. The arm quick locking hooks design and quick-detach landing gear make it convenient for storage and easy to transport. Now the drone's wheelbase is 1200mm, we also support wheelbase upgrade from 1200 to 1600mm in the future.

Gaia 120丨 1kg Payload and 55 Mins Flight Time Hexacopter Released (2 min 55 sec)

GAIA 120 hexacopter is equipped with high efficiency power system DJI E2000, including 6010 motor, 1240X ESC and R2170 propeller. The motor mounting base is also suitable for T-MOTOR U8. As for the propeller, both 22inch propeller and 23inch foldable propeller are suitable. And the fuselage internal space is large enough for two 6s 22000mah batteries. The flight time of GAIA 120 with two 6s 22000mah batteries is about 55 minutes loading with a seeker 18 camera which weighs about 1kg.

The light fuselage, big wheelbase and powerful system make it a high efficiency drone with better loading capacity and long flight time. So GAIA 120 is a high-quality flying platform for aerial photography, search and rescue, power line inspection and survey etc.

GAIA 120 hexacopter can load with all Foxtech series zoom cameras, like Foxtech Seeker-30 TIR, FH336-TR, FH310IR-TR zoom cameras. and the DJI cameras and gimbals.

Version: Gaia 120
Wheelbase: 1200mm
Frame Weight: 2.15kg
Take-off Weight: 5kg(without battery)
Flight Time: 55mins(with seeker 18 camera)
Payload: 1kg (55mins flight time)
Battery: 2x 6s 22000mah
Posted by Bill M - RC | Jun 06, 2018 @ 08:35 PM | 904 Views
Hi fellow pilots & rc enthusiasts

Eachine EX2mini review of this Brushless RTF Quadcopter Drone with Angle & Acro modes - also with 5.8ghz 720p HD FPV Camera. This EX2mini review only includes Flight Test & FPV. See Part I for unboxing, inspection & setup.

You can get this here: https://goo.gl/TwZtgc

Eachine EX2mini review - Flight Test & FPV (Part II) (11 min 47 sec)

Posted by Bill M - RC | Jun 06, 2018 @ 06:43 PM | 932 Views
Hi fellow pilots & rc enthusiasts

Eachine EX2mini review of this Brushless RTF Quadcopter Drone with Angle & Acro modes - also with 5.8ghz 720p HD FPV Camera. This EX2mini review includes unboxing, inspection & setup with a peek at the camera too.

You can get this here: https://goo.gl/TwZtgc

Eachine EX2mini review - Unboxing, Inspection & Setup (Part I) (14 min 3 sec)

Posted by mlilasic | Jun 06, 2018 @ 12:04 PM | 1,083 Views
Review of Giant Power DINOGY MEGA GRAPHENE 2.0 1550mAh 14.8V 75C Lipo Battery

Graphene is the very latest ‘wonder material’ for nano class batteries, bringing with it a range of attributes which lift battery performance to a new level.

Graphene is a honeycomb lattice of carbon atoms, and is a potent conductor of electrical and thermal energy. When Graphene technology is added to Lithium batteries, the ions are able to move much more quickly between the positive and negative electrodes. This boosts the battery performance in every respect and, because of Graphene’s astonishingly light weight, there is no weight penalty. In fact, there is a weight saving!

‘Graphene 2.0’ technology allows to produce market leading Lithium batteries with higher energy density (lighter weight and higher capacity), higher under-load voltage, higher reliability and precision cell matching. As every drone racing pilot knows, light weight and higher output voltage are vital if you want to stand on the podium: The DINOGY MEGA Graphene 2.0 is your route to racing success!

  • Brand Name: DINOGY MEGA GRAPHENE 2.0
  • Item Name: Lipo battery
  • Cells: 4S (14.8V)
  • Capacity: 1550mAh
  • Constant Discharge: 75C
  • Max Charge Rate: 8C
  • Power Plug: XT-60
  • Weight:

...Continue Reading
Posted by JureZ | Jun 06, 2018 @ 09:52 AM | 1,126 Views
Sky Riders Chuck Glider plane bash.

maiden flight.video:

Sky Raiders - converted chuck glider RC frankenplane - maiden flight - Movie (1 min 39 sec)

Bought it at Michael's for $8 , could not resist to make a conversion.

Added ailerons from a donor glider. There are two HS55 aileron servos on the wings. Added a 4 mm carbon fiber tube spar into the wings.
Cut the trailing edge of the horizontal stabilizer straight , to add the balsa elevator. The elevator servo is located at the tail.
Cut the fuselage 9" from the nose to make a firewall and motor mount .

Wingspan : 48", length 28".
CG location : 140 mm behind the leading edge of the wing at the root.

Motor : " Blue wonder " , 25g .
Propeller : 8*4.7 GWS .
Battery : 800 mAh 3S LiPo.

AUW : 425g = 15.11 oz .
Wing Area = 368 sq in = 2.56 sq ft.
Wing Loading = 5.88 oz/sq ft
Posted by CorvetteC5 | Jun 06, 2018 @ 08:52 AM | 1,073 Views
Looking for winter projects in November of 2017, and interested in adding to my RC flying wing collection, I couldn't pass on the size and sale price at Banggood.com for the DW (Dancing Wings) Rainbow 800mm EPP flying wing. The sale was only for version 1 and not the upgraded version 2 design. Comparing the differences, and knowing my plans for it and building skill level, I saved a few dollars by buying the older model. I am very glad I did as the results are excellent! Keeping the build cost low I used as much as I could of what I had on hand. I have less than $50 of new money into this fun flyer!

Listed on the website:

Brand Name: DW HOBBY
Item Name: Rainbow flying wing
Wingspan: 800mm
Length: 365mm
Flying Weight: About 165g
Propeller: GWS 5030
Version: EDF version, tail push version (optional)

Recommended Parts For Tail Push Version (Not included):
Motor: 1404 2900KV
Servo: 5g*2
Propeller: GWS 5030
Lipo Battery: 2S 200-400mAh
Radio System: 3CH
For comparison my build resulted in:
Flying Weight: 295 grams (10 - 3/8 ounces)
Propeller: Graupner 12 x 12 cm CAM
Motor: Racerstar BR2406S-2300KV
ESC: GForce 30A
Servo: Hitec HS-55 Economy Feather Sub Micro Servo
Lipo Battery: Rhino 1050mah 3-cell
Radio System: Redcon 6 channel DSM2 compatible RX

Alterations to the kit are rather extensive to compensate for highly over powering this wing. They include:...Continue Reading
Posted by lmopar69 | Jun 06, 2018 @ 07:54 AM | 1,052 Views
While we were down in Texas at Apache Pass, I added a 1900kv Ritewing Rocket motor to my 26" Cuda on 6S 2900 with a 6x4 carbon prop. This thing rips now.


Here is a link to the video.

Posted by KristofferR | Jun 06, 2018 @ 05:34 AM | 1,092 Views

In my ever-growing hangar of Multiplex models is now the Funcub. I got the kit version from my fb who originally bought it for spares.

The build was pretty straightforward, instructions clear and precise, though I actually stumbled on some things - in particular the rear wheel install requires some thought. A pro tip is to just remove the center spread with the instruction figures to be able to read in your preferred language and look at the figures at the same time!

I would recommend waiting to install the elevator and rudder snakes until after the tail is done. The ”cut to length” instruction only made sense after I had them installed.

Servo choice were Emax ES08MA all around. They are not identical to Multiplex recommended items, so the crevices in the fuselage for the rudder and elevator were a bit too large. I took the opportunity to glue some hard balsa to create a tight fit and finished it with screws for good measure.

I also did the removable tail mod I found here at RCGroups, inserting a threaded wood block in the fin and a nylon screw from underneath.

Just for good measure I put some carbon strips in the fuse before gluing it together. I have done this to several of my Elapor models and they become very stiff, almost balsa-like.

The only receiver I had available was a Multiplex DR-6 so the dual flap servos use a Y-cable. Rather than buying an electronic-servo-reversing-gadget I cut out the wing to fit one flap servo the other way...Continue Reading
Posted by Tazkiller85 | Jun 06, 2018 @ 05:17 AM | 995 Views
Yep Les Amis,
Un parcours FPV à la maison ! C'est ce que vous propose ce petit pack RTF, le FLYTEC H825 + sa radio + quelques éléments pour vous entrainer chez vous . C'est sympa d'avoir un peu de bricollage et d'assemblage quand on ouvre la boite de ce pack, et sans le savoir, ils nous en donnent même une peu plus que prévu ! lol . Ce petit appareil est vraiment bien équippé et bien pensé, tout est là pour éviter de faire une bêtise, la communication bi-directionnelle vous prévient, si vous êtes un peu loin, si vous êtes en fin de batterie ou si vous le perdez dans les hautes herbes . Alors qu'il est très facile à piloter en vol à vue avec ses 3 vitesses disponnibles et ses options de vol, il sera un peu plus difficile à maitriser en FPV car j'ai trouvé la rotation un peu trop nerveuse, il faut prendre son temps pour apprendre à le connaître. En tout cas , très bonne idée ce petit parcours, que ce soit en FPV ou même en vol à vue pour des concours entre amis !!! Bon Vol les Amis

H825 FLYTEC drone FPV Review Test Démo / Petit parcours maison et .. surprise !!! (20 min 47 sec)

NOTATAZ : 16/20 Rapport qualité prix c'est plutôt pas mal !

Niveau : Débutants, Initiation FPV.
Les + : Très résistant, facile à piloter (vol à vue), bonne puissance, très bien équippé (Leds, Buzzer etc ...)
Les - : Petite résolution caméra, Rotations trop brusques en FPV.

Les produits présentés sont visibles ici (en cliquant sur ces liens vous soutenez ma chaîne)...Continue Reading
Posted by RC Roundtable | Jun 06, 2018 @ 12:20 AM | 1,059 Views

Episode 57: "Sweat the SMALL Stuff" is now live!

In this episode, Fitz and Lee are on-location at the SMALL event in Arkansas! They found lots of sunshine and loads of interesting models. We talk about:
-SMALL Overview
-What we didn't fly
-Lee's nitro Cardinal
-Fitz's Q-Tee
-Tiny engines
-Tandem C-17s and other antics
-Did we mention the heat?
-Meeting people
-Sunday summary

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 Bola | Jun 05, 2018 @ 10:39 PM | 1,049 Views
Posted by alex111 | Jun 05, 2018 @ 08:30 PM | 1,053 Views
My model boat collection I have 30 boats enjoy the photos
Posted by Herb | Jun 05, 2018 @ 04:57 PM | 1,492 Views
There are frequent heated discussions here on RCG and elsewhere on what the C ratings of LiPo batteries are, how they are obtained and how accurate they might, or might not, be ...

Here is an example of a so-called "LiPo C-Rating Calculator" that surprisingly does not even state what formula it uses to achieve the answer:


One can even find a $90 device that when plugged into your battery will give you your magic C-Rating:


It looks all like rather mysterious physics until you realize it is all based on 1850's physics (Ohm's law) and middle school arithmetic (see below).

Here is some better discussion that leaves out all the foggy rubbish & nonsense (actually more of a sensible definition of terminology) :


So what is the formula and what exactly does it tell you ??

So take the "calculator" from the first website:

A 5000mAh battery with a cell count of 6 and a cell IR of 2 milliOhm will give a C-rating of 24.5.

A little Mathematica algebra (see pdf below) allows to almost immediately extract the trivial (and ad hoc) formula they are using :

C Rating = 2451 / SquareRoot[ capacity * resistance ]

Nothing else enters the formula (try it out for yourself), all you need is the capacity in mAh printed on the pack (which most can read), and the internal resistance (IR) in milliOhms.

...Continue Reading