R/C Blogs - RC Groups
Posted by bob57hdt | Today @ 11:21 AM | 38 Views
Back in March of 2016 I wrote about an updated SR-7....With the expertise of Daryl Perkins, we had a special new airfoil cut for the SR-7. The shape of this airfoil was such that it would not fit the molded Dura-lene fuselage saddle so I set out to build a new fuselage from balsa and ply.
The wing was blue foam and expertly bagged by Daryl with carbon top and bottom. Other than the Hobie Hawk wings, I had never bagged a wing before so I enjoyed watching one of the best at work. The wing came out very light and incredibly strong with razor sharp trailing edges. These cores were complete airfoils, therefore the ailerons had to be cut from the wing.....talk about being nervous. Plan was to have the hinge line straight on the ailerons which made them much larger at the root and smaller at the tip....still 2 to 3 times the size of the original ailerons. From the start we would install independent servos for each aileron...giving us differential, flap, camber capabilities. Servos and linkage was installed on the bottom of the wing and in that they are vulnerable on landings, clear plastic protectors were made to cover the servos and linkage. Once the ailerons were cut out, I had to face all areas that foam was exposed and I did this with balsa. Now, how do I hinge these ailerons.....gap must be sealed.....I had heard of silicone hinges but like so many other things on the new SR-7 that I had never done before....I gave it a try and it worked the first time.....really...Continue Reading
Posted by burkefj | Today @ 10:27 AM | 109 Views
I always thought the Centuri Skylab rocket from the early 70's was neat but never had one. Being left alone for the weekend my mindsim got the better of me and decided to do an RC rocket glider themed version.

I sat down and did some mass balancing Sims to convince myself weight and dimensions would work and the location if the wing and lateral stability, then looked in my parts drawer. I had some 2" tubing and 2.6". I picked up a bt20 nose cone pack and two white motor tubes for the tail thruster.

I thought styrofam coffee cups might work for the transition and nose and lo and behold the base of the cups were 2". I also found some small paper cups and they nested in the base of the foam cups to extend the nose. I doubled the foam cups for support and used a Depron disk in between them for stiffness and glued a coupler through the base for a shoulder. I doubled the cups for strength.

I'm using an 11" chord Depron wing with two carbon spars. Glide tests are done and it is looking good. I picked up some gold monokote trim for the wing/solar panels because I think it will look better than silver. It's 43" long and 27.5" span and 7.25 oz dry, rtf should be right around 12.5 oz , no nose weight was required. the RX and battery are mounted in the transition section.

I picked up some aluminum tube for rail button standoffs because the nose diameter is larger than the rear by 1/2". I put some skids on the bottom to make it level with the nose when landing. Here she is with most of the markings, just need some lettering.
Posted by Michael in Toronto | Today @ 10:07 AM | 125 Views
(House of Balsa) Northstar
E-Flite 32 brushless motor; 11/7 3-blade prop; 60 amp ESC, 4S-5000mAh battery pack, approx. 600 watts at full throttle.

Rudder broke off on the second flight during a hard touch-n-go (now repaired).
The maiden flight went perfectly. The plane is very smooth. Power is adequate for a nice flight and a few rolls, but I may go to a higher voltage battery pack (5S lipo).

Michael Maiden Flight Northstar (3 min 7 sec)

Posted by xinte | Today @ 05:32 AM | 390 Views
JMT Crazybee F3 Flight Controller OSD Current Meter 4 IN 1 5A 1S Blheli_S ESC Compatible Frsky / Flysky Receiver for Whoop Drone
Frsky or Flysky Receiver optional, Please choose the item according to your transmitter.


Firmware: Betaflight_3.3.0_Crazybee
MCU: STM32F303CCT6 (72MHZ, 256K FLASH)
Sensor: MPU-6000(SPI connection)
Power supply: 1S battery input (DC 3.5-4.35V)
Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready
Built-in Flysky receiver with telemetry AFHDS/AFHDS-2A compatible
Built-in Betaflight OSD(SPI Controll)
Built-in Current meter (Max 14A,could be modified to 28A by replace resistor)
Built-in 5V 0.8A BEC with LC filter
Built-in voltage detection
BLHELI_S pass-through Ready
Heading LED Ready
Board size: 28.5 * 28.5MM
Board weight: 3.5 g

ESC parameters:
Power supply: 1S LiPo/LiPo HV (4.2v/4.35v)
Current: 5A continuous Max 6A (3 seconds)
Support BLHeliSuite programmable
Factory firmware: O_L_5_REV16_6.HEX
Motor connector: JST PH1.25 3pin
Signal Support: Dshot150/Dshot300/Dshot600/Oneshot125/Multishot/PWM

Receiver parameters:
SPI BUS receiver
Frsky D8/D16 switchable
Protocol: AFHDS and AFHDS-2A Switchable
Channels: 8ch(AFHDS) or 14ch(AFHDS-2A)
No ground interference ( Transmitting and receiving 1 m from the ground): 300m
Failsafe support

Package Included:
1 x Crazybee flight controller ESC Flysky/Frsky receiver
Posted by thijs slotman | Today @ 05:10 AM | 401 Views
fly egg 138 new spot! (5 min 12 sec)

Posted by ChrisCro82 | Yesterday @ 11:17 PM | 695 Views
Braap 4s, just messing around. (2 min 30 sec)

I had a HyperLow Vert Freestyle frame that I just couldn't manage to take a liking to. It was a great frame but I honestly think it was prematurely released.
The arms on the Vert Freestyle were pretty thick but they they'd become loose during flight or during a very minor tumble.
So I decided to strip the parts off my HyperLow Vert Freestyle frame and purchase an X-Labs Braap.
The Braap is very good frame and it offers very good fpv camera protection. Although the frame is only really meant to house a 4-in-1 ESC/Flight Controller stack. Mainly because the arms are far to thin to successfully mount individual esc's on each arm. I really enjoy this frame and it offers everything that the HyperLow Freestyle did not. The Braap can run both 5" and 6" propellers with ease. Although the top plate on the Braap is very short so that requires you to mount the lipos crosswise on the top plate. I've been running the Braap on both 4s and 5s lipos without much of a problem. The Ummagawd 2306-2150kv motors truly shine when flying 5s but also fair decently on 4s. I've recently loaded BetaFlight 3.4.0 (RC1) onto the Braap and have almost fully tuned it. It should be fully tuned within a couple days.
Posted by King_of_Wizards | Yesterday @ 09:36 PM | 770 Views
Im looking to purchase the NGH GT17CC engine. Is this engine good? It will be going into a .60 big stik - I want to go gas for this plane. If you have other engines that you think would work please write me back.

Posted by Blaze0021 | Yesterday @ 09:16 PM | 793 Views
This is what happens when I decide to take up my completely stock 1-year old Freewing Rebel V2 70mm EDF Sport Jet out for an aerobatic flight and unknowingly get recorded by my fellow RC Pilot Buddy Mike, aka "Deuces Wild." Completely candid, unrehearsed, and just letting loose.

Freewing Rebel V2 70mm EDF Jet PNP - Candid Flight (5 min 17 sec)

Taking advantage of the clear skies and warm weather this weekend.

Hope you enjoy the candid flight!
Posted by Dirty Dee | Yesterday @ 08:46 PM | 882 Views
I'm compiling a thread to showcase the various ordinance I have modeled and uploaded to Thingiverse for others to download. Thread will be updated as I add more ordinance and complete painting/decals.

Model Downloads for 3D Printing
All these ordinance listed in the thread are uploaded to Thingiverse so anyone with a 3D printer can download the files and print for themselves. One thing to note is that all files are uploaded with a Creative Commons - Attribution - Non-Commercial - No Derivatives license.

Direct links to the specific parts will be posted in the various posts below. For a link to all designs I have created you can go here and browse through the list:

3D Printing Service
If you do not have access to a printer, I offer my services to printing the various parts. I print all ordinance in ABS, as it is more heat resistant to temperature as well as it being able to be welded/glued together with acetone. Parts can even be smoothed with a careful application of acetone via a brush or in a vapor chamber.

Optional Assembly Fee
If you would like for the parts to be pre-assembled, the cost will be $5 for each part. If you buy the LAU-117 with the AGM-65 the assembly fee for both will just be $5 instead of $10. All parts are glued together with acetone.

Shipping Cost
For a majority of parts and bundles, I charge $10 for shipping/packaging.

If the order contains 4 or more pieces, the shipping rate may increase depending on what parts are ordered and if anything is pre-assembled.

How to Purchase
If you would like to order some ordinance, send me a PM with the list of ordinance and any assembly services you would like. I will then respond with the total cost with shipping as well as my PayPal information.
Posted by dufek paul | Yesterday @ 04:06 PM | 1,088 Views
L.E.T. Ventus 2CX 6 mtr. Never flown, not a mark, scratch or blemish on it. Comes with custom made wing bags.
I will not ship, please do not ask, local pick up only.
$4800.00 Price is firm. Radio is not included.

Please PM me if you need more information. Paul
Posted by fly-by-night | Yesterday @ 02:57 PM | 1,109 Views
Well before moving on to the G3 I need to complete the build on the Speed. I sold mine some time back and regretted it, found one on the Group and will finish it with Hyperion HP-DS11-AMB all around, so here we go.
Posted by steevie | Yesterday @ 02:40 PM | 1,119 Views
Thread PAUL's Nemo : https://www.rcgroups.com/forums/show...opter-Test-Bed

Caracteristics :

Wingspan : 800mm (without motors)
Airfoil : N10 modified 15% relative thickness
Weight : 440gr
Accu : Lipo 7.4V 2S 1000mAh
Servos :
2x ailerons Hitec HS-55
2x Tilts Hitec HS-56 HB
1x elevator Hitec HS-55
ESC : 2x 12A Afrojack opto
Motors : 2x Epower 2204 2300KV
Propeller : slowfly 2x 7x6" (CW et CCW)
Card : KK2.1 with OpenAero VTOL 1.5 firmware
Receiver : frsky

Video of my Nemo version
NEMO VTOL (3 min 15 sec)

Posted by WattsSabi | Yesterday @ 08:51 AM | 1,547 Views
PNC mount in (former) Spiro slope nose.
Posted by scruffy1 | Yesterday @ 05:28 AM | 1,739 Views
i always loved the idea of a seaplane, but most of them were either rather complicated, or looked like a recipe for drowning my radio gear (and the motor, and the lipo)

enter thomas B., prolific designer with a thing for depron and seaplanes; this is his great little pseudo-schneider entry, the jupiter shrimp (links to plans in that thread); he's a regular contributor to modell aviator, and makes me wish i was more capable of comprehending german - ah well... google translate to the rescue

to join the fun, you'll need :
(minimum) 4 channel radio
10-12amp 2-3s esc
3x 5gm (or so) servos
a swag of 6mm and some 3mm depron
a 460 mah or so 3s lipo
a small brushless outrunner to turn a 6-7" prop

the design is very basic; my build complicated it a bit; not necessary for a very fine flyer, but it's in my nature to take the road less travelled and the education gained towards my next depron build is its own reward

anyway, some pictures to grab your interest, and you can follow this link to the rest of the photos of my build
Posted by Rcjay509 | Yesterday @ 01:52 AM | 1,867 Views
My best friend who got me back into flying gave me a glasair sportsman for my first build. I will be installing new electronics possibly the original motor,servos, etc... I will be posting pictures of the build.If you have any suggestions please feel free to comment.
Posted by Reckless_fpv | Jun 23, 2018 @ 07:48 PM | 2,118 Views