Posted by Old_Pilot | Today @ 09:14 AM | 277 Views
Our club has a Scale/Warbird Fly-In coming up in early June, and I've been trying to decide what to build.......
Finally settled on the Northrop YA-9......I built her a year ago and she died due to a dumb electrical mistake
on my part.....Gonna try again

Build log will be here:
Posted by benjamin presten | Today @ 08:57 AM | 236 Views
An alphabetical stroll through the history of aviation. Day 21, U

Udet Flamingo: Surprisingly, U is not a common letter for airplane names to start with. So we take a trip to Germany in the 1920s. History Nerds may have heard the Name Udet before. Ernst Udet was a famous aerobatic pilot in Germany. He did airshows with the Flamingo where he would put on quite a show including using the wingtip to pick up a handkerchief off the grass runways.

The Flamingo was a fairly rudimentary biplane powered by an 80hp Siemens radial. It had a plywood skinned fuselage and fabric cover wood construction wings. The wings were supported by I shaped struts which was very uncharacteristic of the times. That’s probably why it’s so easily confused with a Pitts Special.

Most likely because of it’s wooden construction, the survival rate of the Flamingo has been pretty bad. Like, none are left kind of bad. As far as I know at least. There are however, two replicas. One is still flying powered by a Lycoming. The other was powered by a Siemens but is currently having some repair work done after a minor incident in which it’s left wings were destroyed.
Posted by spoutniks | Today @ 08:49 AM | 252 Views
Support for my car
Posted by old4570 | Today @ 07:04 AM | 302 Views
A nice DLG day - Raven 990 (11 min 10 sec)

Been a long time since I flew the Raven 990 ..
I did something to it over a year ago to slow it down , just flew too fast .
So needed to be re trimmed .
Now that it flies slower , that CG looks to be a bit of an issue .

Came home and pulled some lead out of the nose . Move the CG further back to the recommended ( manual ) spot .
I have two batteries , on that will hit the recommended CG and a slightly larger heavier battery that will move the CG a little further forward .
Will see how that goes in the future ..

There was a little bit of lift when I started trimming , but by the time I fired up the cam the air was pretty much dead .
Also the wind was in the Sun , that was a pain . Trim is close .. Just need to deal with the CG
Posted by Kristoufle | Today @ 04:50 AM | 351 Views
Hello dear all, So that's it, I'm posting the 1st entry on my blog,
I wanted to share with you the link to my YouTube channel, Were you will find videos about my achievements, and some tricks & tips to help you in some steps of your own building:
Posted by | Yesterday @ 10:18 PM | 505 Views
Recently I've done a lot of work comparing a high kV 2s brushless setup to a low kv 3s brushless setup using the WL TOys 124018 as a base same as 144001 and 124019.

This is based on the setup in my drop in brushless upgrade for these cars.

Peak RPM for both motors is 40,000 rpm using 2s on the 5400kv motor and 3s on the 3600kv motor.

Both setups were evaluated for efficiency, heat generation and top speed via GPS and then for a laugh I tried 3s on the high kv setup and 2s on the low kv setup.

Full results and findings are here:

Posted by Jack Crossfire | Yesterday @ 08:55 PM | 562 Views
The PLA parts got quite deformed. There was 1 crack. At least this gave some more direction on where to add reinforcement. There's definitely a place where sheet metal could be bolted in, to try to dissipate heat. The wheel hub is definitely holding back a lot of outward force. Not sure how best to farsten it to the wheel. It would need a lot of farsteners.
Posted by VicT | Yesterday @ 07:08 PM | 604 Views
Flaps get you down and slow you down. Flaperons and Spoilerons get you down but don’t slow you down. That’s why I cut flaps into the Apprentice wing the same width (chord) as the ailerons. You can drive them with one or two servos. The challenge is the Apprentice receiver. Keep the ON/Off white switches in the Off/Off position. I use B0 and B1 for Beginner Mode but audio alerts are “Self Level”. B2 is “OFF. I make the B switch a FM or transmitter flight mode and switch the Trim to FM so I can trim the B switch. I select the D switch for flaps in the Aircraft Type menu. A y cable for the ailerons and a Y cable for the flap servos. I can trim the elevator for D0 “Flaps UP”, D1 “Take off Flaps”, and “Landing Flaps”. I have aileron to rudder mix butt limit the value so as to prevent rudder reversal which is a bug in the receiver. The AR 636 receivers solved this problem.

First plug any working servo into Aux 2 of the receiver to check servo operation and program verification. Select 1 Ail 1 Flap on Aircraft Type on your DX 8 or 9. If you updated your DX6 to get 7 channels you might have good luck. Bind with a new model making sure your B switch turns SAFE ON and Off. Next follow the pics below:
Posted by benjamin presten | Yesterday @ 08:31 AM | 1,020 Views
Okay. Back to the Alphabet. Day 20 T

Travel Air Mystery Ship: Built in the late 1920s by Travel Air, the Mystery Ship was the fastest racer of its day. The first three were built in secret (hence the name) with the sole intent of beating the military racers that were dominating the scene. The Travel Air Factory painted out the windows in their factory so that they keep the project hidden from the press.

The design was pitched to Travel Air CEO Walter Beech by its designers Herb Rawdon and Walter Burnham. Building of the first three prototypes was started in 1928 and they were completed and flown in 1929. In september of 1929 the Mystery Ship became the first significan civilian racer to beat the military racers clocking in at a top speed of 208mph.

The Racer was flown by quite a few famous pilots including Jimmy Doolittle and one was even owned by Pancho Barnes and Paul Mantz. A total of 5 were built by travel air powered by a handful of radial engines and one with a Chevrolair inline 6. The fifth airplane was built for the Italian Air Force who used it for development of the Breda BA. 27 fighter.

Today there are a few replica Mystery Ships flying and a few originals in museums....Continue Reading
Posted by Jack Crossfire | May 04, 2021 @ 10:25 PM | 1,250 Views
It was big enough to fit the giant DSLR lens & a shirt, with flexing. 5.2 miles later though, the motors were lava despite not undergoing any stops & starts. Morbid thoughts & depression then ensued. It's pretty worthless if it can't sling the DSLR around.

Upgrading to 5060 motors is fading away. A 3:1 belt drive is gaining favor, but the starting torque suffers. A pancake motor is gaining favor. Another idea is bolting the existing motors to sheet metal & the sheet metal to heat sinks, to give them some minimal cooling. At least the DLSR is worth the heft.
Posted by tntctom | May 04, 2021 @ 09:40 PM | 1,199 Views
New to me Bob Martin SR7. Can't wait to get it on the slope
Posted by old4570 | May 04, 2021 @ 09:10 PM | 1,225 Views
Micro Mini Stick 2nd flight on 2s (10 min 6 sec)

That Zippy 350 really hangs in there in this combo . Battery voltage again was 3.83v when I put it on the charger .
Just needed a little aileron trim .
When you cut power the nose drops a little . ( I dont mind )
Flies reasonably straight for a balsa / ply plane , especially a micro size .
Dancing wings R03 Still available , $25 in the USA

I dare say , it could be built even lighter with smaller servos / motor / esc and battery .
A sweet little park flyer . Mine makes hardly any noise at all , from any distance it may as well be a glider it's that quiet .

Mine comes in at 126 grams with a zippy 350 2s ( Flying weight ) ..
I think with some careful building , 100 grams may not be out of the question . ( component choices )

The way I built my wing , I got a little more chord , but my CG is right on 45mm from the LE
Posted by Reckless_fpv | May 04, 2021 @ 07:11 PM | 1,251 Views
Posted by Reckless_fpv | May 04, 2021 @ 07:10 PM | 1,254 Views
Posted by Reckless_fpv | May 04, 2021 @ 07:09 PM | 1,251 Views
Posted by WizofWires | May 04, 2021 @ 03:05 PM | 1,386 Views
Harrier AV8B Longflight (5 min 23 sec)

When I found my PhoenixRC 4.0 disc in a box while cleaning, I nearly threw it out. It's a good thing I didn't!

I discovered a whole new world of great members who are still flying PhoenixRC and thriving. I tried downloading a
model that I have wanted and broke out an old laptop to demo on. It has been "all aboard" since then.

Part One- Small EDF power for UMX-sized Jet Models.

This Mini-HowTo is intended to describe my work-around for some "wish list" items that I find lacking in PhoenixRC.
(There are more, but here's a start) I believe EDF jets were around by the time the original v3.0 was conceived, but
were only lightly represented in updates (Habu, Habu2, A10 handlaunched). The only methods available for building
your own, in Builder, were A) scale down a turbine or B) use a faux prop, and make a pusher. The creative team had
more options, but the lonely user had to "trick the sim". I basically used the Habu2 (a scaled-down turbine) and disected
it. Importing the .geo (geometry) file into builder with a much smaller preset wingspan, (0.372meters) to match the
30mm EDF powered UMX-Habu-S. I then punched in the position and sizes of the airfoils to match the model in Builder.

Why did I do this? ... Being equipped with a 3D printer and reading the 30mm EDF thread, right here on RCG, I had
a bunch of beatifully designed ducts and Impellers that I wanted to...Continue Reading
Posted by hugo secondname | May 04, 2021 @ 09:04 AM | 1,537 Views
I've read lots about foam edf jets and found many plans for some on RC Groups. I've decided to build an f-22 raptor and power it with a 25mm edf.
I 3d printed an edf hull (or whatever the bit around the prop and motor is called) and put a 10000 kv motor in it, turning a 4 bladed prop.
The motor is running of a 450mah 2s tattu lipo battery and a jamara xetronic 3a esc. All the components are rated for 1-3s lipo. Trouble is, when I run the motors on full throttle for more than a few seconds, it bets unbearably hot and starts to smell weird. I'd appreciate it if anybody could help me find a solution to this problem, so I can continue my build.

All help is appreciated,
Hugo S.

Ps: here's the link to the motor :