Posted by Sean Oelofse | Today @ 05:26 AM | 405 Views
I've completed the build of the F-20 Frankenstein.

Check it out ..... https://www.rcgroups.com/forums/show...RANKENSTEIN%21
Posted by Jack Crossfire | Today @ 02:40 AM | 501 Views
It was after laying this out that the lion kingdom realized how much its philosophy changed in the last 20 years. An ARM is seriously overkill for controlling a 3 phase motor & receiving packets from the radio.

20 years ago, a lion would have used an 8 bit PIC, developed the routines required to generate 3 PWM waveforms in software & receive packets from the radio. It's just so much easier to get that working on an ARM & there are enough spare ARM chips in the apartment, it's no longer worth the trouble. If it was 20 years ago & lions had only PIC's, it would have been done the old way.

Then, after playing with the spectrum analyzer, it was revealed that the giant loop antennas lions used for the last 11 years are unnecessary. They were seen as a way to use balanced antenna pins without a balun. In reality, a monopole gives good results with just a 16nH inductor shorting the outputs & a 100nH inductor in the 3V supply position. If a loop antenna is used, it doesn't need the 16nH inductor.

Lions had always based their usage on the balun circuit in the MRF49XA datasheet & never tested the signal strength of different antennas, even with the RSSI functionality built into the radios. They just spread the radios apart on a golf course until they stopped receiving.

The extra parts for the MRF49XA may have been to match a 50 ohm load. When this part was rebranded later as the SI4421, the new datasheet only showed a loop with no inductors, but lions never saw it. They even left out the 100nH inductor that supposedly chokes the RF from entering the 3V rail. The 100nH would only be needed for transmitting & FCC certification. Not sure where the 16nH came from. The MRF49XA datasheet showed a 22nH.
Posted by burkefj | Yesterday @ 08:27 PM | 969 Views
This was a flight on the new Aerotech 29mm single use 8" long 17 second burn H-13 motor with a spike off the pad and 3# thrust for the remaining burn time, loaded on the pad this 6' tall glider weighed 32 oz, it was a bit sluggish on boost when going vertical so I let it angle a bit and in order to keep it overhead flew in a corkscrew over the top of myself till burnout at approx 1200 feet.
6' R/C rocket glider flying on 17 second burn H-13 longburn motor (4 min 5 sec)

Posted by old4570 | Yesterday @ 08:08 PM | 1,031 Views
18650 Mini Stick (20 min 34 sec)


The Overlord has graciously metered out 2cc of RC ! To those requiring a dose of LIVING !
I woke up @ 6am and was on my way to the park before 6.30am .

Yes , I dropped the proverbial ball by not pre flight checking before leaving home . There were things forgotten about !
Things best left un said !

So , came home , fixed a few things and headed back out .. Yes , got lots of walking in this morning and only 1cc of the precious 2cc of RC
Lucky for me the plane is powered by a 18650 . so run time is exceedingly high !
What is not high is the power / thrust . It is very much marginal .
It does fly , but there is little in the way of enough power . Especially if you do something silly there is no powering out of the situation . So one needs to fly as if the models life depends on it ( probably does ) .

18650
6A 1-2s ESC
6x4 prop
RacerStar 1811 3800kv

Mini Stick . = What a very nice little plane ! On a decent 2s power system with at least 1:1 power to weight this little stick should be a real joy to fly . It does get knocked about by the wind , so in that regard it would be a fair weather flyer . But again , a better power to weight ratio would negate some of that sensitivity to wind . My entire flight was 90% power to begin with and as the battery voltage dropped under load I was up to 100% power . Which was just enough to keep the stick flying smooth . At this time my only choice is to...Continue Reading
Posted by jmxp69 | Yesterday @ 04:27 PM | 1,400 Views
Bitgohobby.com sent me a Dynam PT-17 for review. Here is the first look video. I'll put together a build recap and maiden video as soon as I can:
Dynam PT-17 First Look (15 min 57 sec)

Posted by rchrist | Yesterday @ 02:22 PM | 1,744 Views
Due to the lack of spare gears and the awful sound that the gear to gear makes, I've gone direct drive. I'm using a sunnysky R23-5 motor on the main and turnigy 1811 motor on the tail making my 4f200 with 3 blades gear-less. I installed the R23-5 on the stock main shaft and I'm using the walkera FC and walkera main esc for now. It's got a fvt littlebee pro esc driving the tail with blheli tail firmware. CF tail boom without the belt drive setup and got a mastercp rudder blade on the tail motor. it's running on 2s or 3s and almost 55g lighter than the stock 4f200 on 2s.
Posted by PittSpecial | Yesterday @ 11:44 AM | 2,044 Views
Guys,

As some of you have noticed, I have acquired a cool NAVY T-29 Trojan (1.1m) from a friend here in Orlando, Florida.

The cool factor is it came with retracts!

Of course we are human and about two weeks ago I was performing Cuban-8's a little close to mother Earth and yes, I augured it nose first in the soft grass field at my RC Club. Everyone was shocked saying I never seen you crash.

Well, yes indeed we all do and I continued saying "If you are not crashing then, you are not flying RC!"


Took me about one week, Off and ON working on the model and the only thing new that I purchased was a Brand New STOCK Park Zone 480 motor, now they are going by the E-Flite number ELFM-480BL because as I understand HORIZON is phasing out the Park Zone brand. My point guy over at the Hobby Store informed me that HORIZON just might return the T-28 Trojan (1.1m span) under the E-Flite Brand. Additionally, I replaced the heavy rubber tires back to the larger foam (threaded) tires as this saved the model a whopper of almost three (3) ounces.

Anyway, I have finished re-maiden flight and all completely successful. This time the Cuban-8's were performed a little higher for that brain fart factor. I am getting older.

This following Video was recorded two nights ago making some additional adjustments to the Nose Wheel Retract and Steering Strut along with the nose wheel steering that has a PULL-PULL system. The strut is super stable with the slight angle rearwards (AFT) and it retracts like a dream.

Park Zone T 28 NAVY Trojan with Retracts Adjustment for effective Nose Wheel Sterring 09 27 2020 (4 min 39 sec)

Posted by DutchRC | Yesterday @ 11:05 AM | 2,051 Views
Halloa people

sooo another Eachine in the house.. In general lower quality products IMHO but there actually aren't that many decent beginner sets.. Most times you get an semi-indoors quad in that case.. That might not be what you want

Link to this quad: Eachine Tyro79S beginner FPV flying setup

I have a couple of video on this but let's actually start with the review

Eachine Tyo79S - Ready-To-Go FPV Drone (?) - FULL REVIEW ! (22 min 19 sec)



Specifications:
type: FPV Fun-flier / Park-flier
wheelbase: 140 mm
base thickness: 3 mm arms
material(s): carbon fiber + some alluminium
dry weight:
flight controller: generic F4
firmware version: old :P
ESC's: 20A Beheli_S
motors: Eachine / Racerstar 1607 2800 KV
propellors: Racerstar 3040 (similar to Gemfan props)
FPV camera: generic 700 tvl CMOS
VTX: generic 200 mW
Lipo: 3S 650mah (2 or 4 included) or... 4S?? (to be tested)
OSD: yes, Betaflight
smart Audio: Yes, TBS SA
buzzer: nope
LED's: nope
spare props: Yes, you get 2 sets of props
Posted by Yankee54 | Yesterday @ 10:44 AM | 2,123 Views
Various photos from the Orlando Buzzards FSS 12 ALES Contest at Christmas Field, Christmas Florida on September 26, 2020.

Post 3 of photos from the Orlando Buzzards FSS 12 ALES Contest at Christmas...Continue Reading
Posted by Yankee54 | Yesterday @ 10:38 AM | 2,174 Views
Various photos from the Orlando Buzzards FSS 12 ALES Contest at Christmas Field, Christmas Florida on September 26, 2020.

Post 2 of photos from the Orlando Buzzards FSS 12 ALES Contest at Christmas...Continue Reading
Posted by Yankee54 | Yesterday @ 10:24 AM | 2,255 Views
Various photos from the Orlando Buzzards FSS 12 ALES Contest at Christmas Field, Christmas Florida on September 26, 2020.

Note: Additional photos will follow on an additional post, as the limit is 150 photos per post.)...Continue Reading
Posted by PittSpecial | Yesterday @ 06:00 AM | 2,242 Views
Guys!

Not everyday you will encounter a Mid-Air collision by two (2) GWS Pico Tiger Moth RC Electric Models sharing the same air-space at the same time and trying to perform Formation Flying! HA!

Two pico GWS Tiger Moths in Formation 09 26 2020 (8 min 50 sec)

Posted by PittSpecial | Yesterday @ 02:44 AM | 2,314 Views
Hello good people!

A few months ago I purchased a few E-Flite 480 Brushless motors that came without any X-Mount.

I have searched High and Low and it seems like E-Flite doesn't sell the black metal X- Mounts that come with these motors or at least the smaller "Park" 480's.

Anyway, I went to visit my Orlando, Florida hobby store known as GravesRC and I went to look at their chock full of selections while helpful Mark (at the airplane counter) tried to look for the stock Black Metal X-Mount.

Well, as it turns out, Mark failed to find any separate E-Flite supplied Black Metal X-Mount and was amazed that I found an X-Mount from FMS / RocHobby with Part Number FMMDJ009 that had the identical bolt pattern for my E-Flite Park 480 brushless motor!

I am sharing this just in case some of you run into the same problem.

Pictures!
Posted by Blaze0021 | Sep 26, 2020 @ 10:56 PM | 2,469 Views
A follow-up to my previous video, here is a 3S Flight Video of my Eflite UMX Waco Monoplane Golden Age Fantasy #7 “Lorenz Racer”. Thank you Robert for getting the flight footage, and thank you Brad for the custom personalized decals.

Eflite UMX Waco Monoplane Golden Age Fantasy #7 "Lorenz Racer" 3S Performance Flight (4 min 17 sec)

“Just because it hasn’t been built yet, doesn’t mean it can’t be built.”

The UMX Waco Monoplane Golden Age Fantasy #7 “Lorenz Racer”. Named after David Lorenz, the Regional Park it was born and is currently flown in.

Powered by an Eflite 3S 300mAh 30C Lipo with an Eflite BL180 3000KV Motor / Eflite 5x2.75 Prop combo, and additionally cooled with a custom-painted “Ram Air” Spoon Scoop and Hidden Vented Cockpit Exhaust. A Carbon Fiber Flat Spar is embedded in the main wing for rigidity. All of the old carbon fiber connection wire bits have been sanded and painted over to match the scheme. The old connections to the interplane struts and fuselage joiner have been covered with their original plastics which have been sanded so it looks like it was made that way. A UMX Champ S White Prop Spinner and Custom Decals by Brad Lupher finishes the model.

Idea Inspired by The Golden Age of Air Racing:

The Golden Age Of Air Racing (50 min 20 sec)
...Continue Reading
Posted by Tahoed | Sep 26, 2020 @ 10:51 PM | 2,416 Views
Picked up this from Aloft Hobbies Pretty impressive for the price....
Wing is only 10mm at the thickest, so it requires 8mm servos. The new 6mm KST's would probably be the best choice. I'm using some 9mm Bluebird's. (BMS 115-HV) They fit the supplied servo frames but are just a tiny bit tall for the servo covers.
Posted by Leadchucker | Sep 26, 2020 @ 09:42 PM | 2,655 Views
Some photos for your entertainment . Straight forward easy ARF assembly. Build quality is good for electric but i would think a bit dodgy for engines with the vibrations.
Still waiting for backordered servos and power plant so no flight reports. 50cc Rimfire motor and CC 160 amp ESC will do the prop spinning...Continue Reading
Posted by steve mahoney | Sep 26, 2020 @ 09:34 PM | 2,473 Views
Circumstances have combined to keep me away from the workbench for a few months and my list of tug models waiting to be made has ground to a halt.

Apathy and lethargy have also played a big part – I need to get back in the saddle.

In the meantime, I have been part of a maritime art exhibition in my hometown. I had a series of prints of local boats, lighthouses and beacons/buoys.

The show was a reasonable success and the few prints I managed to sell just about covered the costs. I think that next time round I'll be a picture framer – they charges twice the price of the artwork just to frame it!

Attached is a selection of the prints I had on show. They are all quite large. The buoy print is 1240 x 920mm, The lighthouse: 900 x 600mm, the Liners: 1250 x 600mm, and the tugs: 600 x 400mm.

The liners are the (new Zealand) Union Company's Maunganui at different stages of its life – a troopship in 1915, a liner in 1935, and a hospital ship in 1945. In 1948 it was sold to a Greek company, renamed the Cyrenia, and took immigrants from Greece to Australia for 10 years before being scrapped. The Cyrenia had a black hull and looks a bit dull so those prints didn't make it into the exhibition.

The tugs are one of the current Wellington tugs (Tiaki, a Damen 2411) and the tug it replaced 7 years ago, the Kupe (NZ built in 1971).

The buoy is Moaning Minnie, the one that marks the reef at the entrance to the harbour, and the Pencarrow lighthouse is opposite it on the other side of the harbour entrance.
Posted by old4570 | Sep 26, 2020 @ 09:30 PM | 2,493 Views
I had to pull the motor to tighten the prop .
There are two holes either side of the nose , these lead to 1.5mm grub screws
Un tighten them , and pull out the motor . Now you can tighten the prop to the shaft ( By hand should be fine )


Next I had to run up the motor / prop combo for some current figures and check for VIBRATION !
Yes ! Cheap folding props can vibrate .... ( Any prop can )

Current draw peaked @ 5.7A ( 2s )
Vibration was a bit heavy from 75% to 100% throttle / power .
Around 50% power the prop was smooth , but the amount of thrust is ....................

To smooth out the prop I scrapped plastic off the spinner till the assembly smoothed out . ( Those blades are so small I did not want to touch them )

Just need a Rx and battery , then do a bind and go fly ( When our OverLord allows it ! )
Posted by HyperHelis | Sep 26, 2020 @ 01:37 PM | 2,859 Views
Blade cp blade grips and feathering shaft?
Posted by Felipe Garcia | Sep 26, 2020 @ 11:47 AM | 2,903 Views
JJRC M02 (3 min 55 sec)