Posted by edwardjohn | May 21, 2021 @ 01:51 AM | 32,318 Views
Product : HOTA F6 4x250W 15A 4 Channel Smart Balance Charger with Type-C for Lipo LiIon NiMH Battery
Price : US$110.99
Where to get :
Specification : Link here

Link to download manual :

A new charger with 4 outputs! Is more means better?

Watch the video below to find out!
Best All-In-One Charger 2021 - HOTA F6 4x15A Charger (12 min 39 sec)

Also it's not just a typical charger, it can be your servo tester, PWM signal reader and PPM output too!

The charger measures at 11.5cm x 12cm x 4.5cm with a stand a the bottom to tilt it up when you want to.
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At both sides, there are Channel 1 & 2 output on the left, and Channel 3 & 4 output on the Right.
...Continue Reading
Posted by Old_Pilot | May 20, 2021 @ 01:15 PM | 35,518 Views
Down to push rods and control horns. A friend of mine is going to 3D print me napalm cannisters for the 10 hardpoints under the wing...The graphics are superb.....between a new Epson 2760 printer and the Avery vinyl, I can't buy anything any easier or better
Posted by onecrashaway | May 20, 2021 @ 07:20 AM | 31,132 Views
Warn weather is finally here!
Posted by Jack Crossfire | May 20, 2021 @ 02:40 AM | 33,661 Views
The journey began with the only aluminum sheet outside China. It was too thin to be very useful, but the alternative was a 3 week boat delivery. A 3D printed stencil & a lot of extra drilling got it to fit. It had a few sharp corners & is a bit low under the chassis. Just a matter of making a new 3D printed stencil with the desired shape.

Installing the motor module with heat sink is a truly awful experience. These motor mounts have continued to have farsteners coming loose. Using CA glue on PLA as threadlock was a failure. It held up, but claimed its 1st farstener. The next step would be using loctite on PLA, which doesn't bode well.

The existing farsteners may be overloaded. If the motor mounts extended all the way under the ship & attached to each other like a belt, it might hold up better. 2 farsteners could go under the ship & farsten the 2 motor mounts to each other. Then 2 more could go on each side, above the motors where they would be easier to access.

The traction module is due for a major refresh, along with new H-bridge boards, higher voltage capacitors. The steering module has been surprisingly trouble free, despite being the leading edge of the bashing.
Posted by VicT | May 19, 2021 @ 05:58 PM | 36,373 Views
V900 is ready for first flight to trim and adjust elevator spoileron approaches with power on and off. I removed the 8x8 prop and used a 50 mm Turbo spinner with a 4mm collet for 9x7 Cam blades. On 3S this will be a low power set up with an estimated 11,414 rpm using Electro Calc and a 1260 KV E flite motor. Iíl tach her before takeoff to get actual RPM on the Turnigy 75C 1300 mah Graphene. My goal is to make her easy to fly like a motor glider with high speed power off dives. Iíve used the V900 receiver in 3 other motorgliders and have had no problems with Self Level/SAFE On. Iíve never flown the V900 but have flown a 2M warmliner to 125 mph. Others have reported that she does not turn with SAFE at full throttle. If this is true I have increased aileron throw at the clevis and on the DX9 with 120% high rate, 100% mid rate, and 80% low rate with 40% expo. Elevator and Rudder are IAW manual. The CG is marked IAW manual and Iíve made a removable CG bridle to check battery placement. The wing decals are lifting despite CA adhesive. Iív covered and secured the decal edges with Chrome Monocote. The canopy is hinged with Tyvek paper after using 100 grit paper to remove mold release and rough up the skin. An aluminum swivel latch prevents the canopy from liffting off. The belly is protected using black Duct tape. The program has automatic spoiler retraction with high throttle and cross trims to make aileron and elevator trimming easier to...Continue Reading
Posted by turbinefancy | May 19, 2021 @ 03:20 PM | 38,384 Views
Drilling down on fundamentals to ensure long life on a sweet head-tracking FPV rig. 8 touch and goes to see how precise I can land a greaser on runway centerline. Enjoy!

Freewing Mig 29 Head Tracking FPV Landing Drills (7 min 37 sec)

Posted by phil alvirez | May 19, 2021 @ 01:50 PM | 40,500 Views
once i lived in a house that had a large trellis that covered the whole sides including windows. to trim it to clear the windows i had to chase a fellow gardener that had a tall ladder, but couldnt find him before 11:00 am. when i asked him why i couldnt find him before that time he said that he didnt need to work before to get all the money he needed. at the time i found this silly, but after many years chasing more money, i failed to realize that what matters is to understand what you really need to be happy.
now that am retired and live a quiet comfortable life i see the wisdom of that modest fellow that was aware of what he needed to be happy and didnt push beyond that. to me, learning this is the key to happiness.
Posted by DutchRC | May 19, 2021 @ 01:04 PM | 39,207 Views
Howdy poeple

I recently noticed Foxeer's new Reaper ESC's which is a 20x20 4-in-1 and that is nothing new ofcourse
But.. this is one 8S capable (or so they say :P) ... Very exciting and interesting! More then enough reason for a new build!

Comoing across these new ESC's coiincided with Rotorama releasing a new 5" racing frame If you follow my channel, you probably know I often use their frames.. Sooo done deal! This will be a 5" 8S racer build

Link to the frame: Rotorama Samurai v3 Pro

First things first! Here is a review of that new frame

Rotorama Samurai V3 Pro (Last Samurai Build Project) - FRAME REVIEW (14 min 34 sec)

The other parts I'll use:

Foxeer Reaper ESC:

Foxeer F722 mini:

RCinpower Wasp Major 22.6-6.6 1860kv:

DALprop (new) Cyclone T5146.5 racing prop:

Foxeer Micro Predator 5:

TBS Unify Pro32 Nano:

Foxeer Micro Lollipop ufl:

Frsky XM+ receiver:
Posted by Calypso6858 | May 19, 2021 @ 05:28 AM | 34,279 Views
Rawdon T-1: In 1938 Herb Rawdon left his position as Chief engineer at Beechcraft (and previously Travel Air) and joined with his brother to start Rawdon Brothers Aircraft. Their intent was to produce a new airplane for a Civil Pilot Training Program contract. They designed a handsome low wing tail-dragger called the R-1. Unfortunately, the R-1 failed to win the contract, some speculation was that the airplane was actually too easy to fly.

After the war, Rawdon Brotherís Aircraft built a new airplane, the T-1. The T-1 ditched the R-1s side by side seating for a tandem arrangement and went to the larger Lycoming O-290. Throughout the production life of the T-1, it continued to morph to match itís market. Initially, 13 were produced in standard configuration for trainers. However, as the remaining 22 were produced, they continued to change.

The T-1 was initially built with a steel tube fuselage and wooden wings all covered with fabric. In this configuration the Rawdons proved to be very versatile airplanes. They were excellent short field airplanes thanks to their significant wing area. Hey also proved to be very good for aerobatics and even performed in quite a few airshows in the late 1940s and early 1950s. However, as they found their place in the aviation market, it became clear that what they were best at was crop spraying. So Rawdon continued to modify the design to suit this role. First exchanging the rear cockpit for a spray hopper, then the wooden wing...Continue Reading
Posted by GEMFAN ts | May 19, 2021 @ 03:31 AM | 39,298 Views
Rotor Riot Rampage LED props! Did you get your hands on one?

Remember to send them pics to us so we can share them! Only 300 sets in the world!
Posted by solentlife | May 19, 2021 @ 02:16 AM | 40,929 Views
I have 3 hobbies ..... RC of course, then full size Yachting, and finally fishing.

2020 of course was a disaster for all 3 as CV19 swept across the Globe causing lockdowns and restrictions for all. As time went on - easing Lockdowns and CV19 hit back ... so even tighter lockdowns ...

Here we are in 2021 with Vaccinations in progress - but still CV19 has a grip on us.

Is there a light at end of tunnel ? Yes a small flicker is appearing - but it all hinges on us all getting our vaccinations and doing best to reduce spread of the CV19.
It will be a long while before open full flight line meetings and TBH - I think CV19 is never going to fully go away. It will sit there waiting its chance to strike out ..

Here in Latvia - the pandemic is serious - hospitals full and staff struggling to cope. But movement is still relatively free. We have restrictions on numbers in gatherings ... masks ... controlled access into shops etc.

Maybe I am not alone - but the urge to go out and fly is there - but the actual will to get up and go is ?? after all this time locked down. I'm sure that once I get a model back in the air - the drive will be back again ... its just that initial get up and do it !

Lockdown has created a hangar full of new models to maiden .. but flight fields have been lost. The CAA has issued more Red Zones making the distance to travel to fly greater. Owners / those responsible for land suitable are increasingly reluctant to agree use.

I wonder what the future is ?
Posted by Calypso6858 | May 18, 2021 @ 11:09 PM | 31,703 Views
Doyle O-2 Oriole:

After the Doyle Brothers parted ways with Vulcan, each side started their own new airplane company. Check previous post about the Davis D-1. While Davis was getting the V-3 started, the Doyle brothers started the O-2 Oriole.

The Oriole was aimed at exactly the same market as the Vulcan and Davis. It was a small two seat parasol with a radial engine and a tail dragger configuration. Unlike the Davis however, it shared no particular design parts with the Vulcan, it was an all new design. It had an all new welded steel tube fuselage with sleek curved aluminum for the turtle deck and belly. The wings were of all wood construction and covered with fabric like the rest of the airplane.

The Oriole had a small production run of only 7 airplanes. Most were powered by 65hp LeBlond radials however one was powered by a Chevrolair 120hp inline four. The first two production airplanes, serial numbers 2 and 3, were both destroyed in crashes on the way to Detroit for an airshow. Number 5 was rushed to the airshow conveniently on the road. Number 5 is also the single survivor of the example.

Restored in 1987, serial number 5 belonged to the Schrack family in Pennsylvania for a long time but now resides at the Eagleís Mere Air Museum....Continue Reading
Posted by Calypso6858 | May 18, 2021 @ 10:47 PM | 30,026 Views
Davis D-1: I said I would get back to this airplane and itís brother the Oriole, so here goes.

In 1929, after the Doyle brothers left the Vulcan Aircraft Company, Vulcan was bought by Walter C. Davis of the Davis Automobile Company. Davis and Vulcan merged into the Davis Aircraft Corporation. Davis continued modernising the Vulcan American Moth. The Davis V-3 was the earlier version of the Davis and shared the tail feather shape of the American Moth, which apart from engine was the only distinction from the D-1.

The V-3 and D-1 had a lengthened and rounded fuselage along with a new landing gear design. Initially the design was powered by a 60hp LeBlond radial, but later versions were powered by 85hp LeBlonds, 90hp Lamberts, 100hp Kinners and 125hp Warners.

The Davis was a healthy performer with the larger radials and later models were even certified for aerobatics. With the tapered wings, long ailerons and authoritative tail surfaces, the pilots who have had the luck to fly the Davis say it is a fantastic thing to fly. The Davis was frequently fitted with elegant gear leg fairings, wheel pants and speed ring or NACA cowlings. That paired with the elegant wing and proportional design, the Davis is also quite a handsome design. I have a particular liking for parasol designs and the Davis seems to me to boast the best flying characteristics and best looks not to mention there arenít many two seat parasols.

Davis pushed 61 V-3s and D-1s out of the factory and one...Continue Reading
Posted by Calypso6858 | May 18, 2021 @ 10:33 PM | 29,461 Views
Younkin-Dake Mullicoupe: Today weíre going to take a jaunt into an era I donít normally dabble in. The Mullicoupe may look old but itís anything but.

The Mullicoupe is the brainchild of Jim Younkin and Bud Dake. Dake and Younkin were each experienced in high performance, high winged, radial taildraggers. Dake owned a Monocoupe 110 Clip-Wing and Younkin owned a replica Howard DGA-6 Mr. Mulligan and restored another Monocoupe 110 Clip-Wing. Apparently in conversation, Dake and Younkin came up with the idea of combining the Monocoupes and the Mr. Mulligan into a middle sized airplane.

Younkin, who was an exceptional craftsman, got to work like nobodyís business. The first rendition of the resulting airplane, the Younkin-Dake Mullicoupe, was taking shape by 1989. Younkin and Dake each built themselves a Mullicoupe and a third was completed for Red Lerille. All three were in the air by 1997. A fourth was started but has yet to be completed, and with Younkin and Dake both being deceased, the progress seems to have slowed or even stopped at this point.

Red Lerilleís airplane remains in his hands. Dakeís airplane now belongs to Mark Holliday and remains airworthy. The first one, Younkinís airplane, which was rebuilt by Younkin after a fuel starvation accident, now belongs to another private owner in Northern California and flies on an almost daily basis.

The Mullicoupes boast incredibly good performance. They are powered by a 450hp Pratt & Whitney R-985 for a two seat ship with only 29í of wingspan. With a cruise speed of 210mph they clip right along. Younkin was also an exceptionally sharp builder and laid the airplane out ingeniously to make an exceptional pilotís airplane.
Posted by filago | May 18, 2021 @ 07:10 PM | 31,889 Views
Here's a way to estimate the in-flight battery use when you don't have on-board sensors to measure it for you. This works great for me in OpenTx; I'm not familiar enough with other Tx systems to know how well it applies.

The idea is to create a channel that has output proportional to full-throttle amps, and use that channel as input for a Throttle % timer. That timer will run proportional to mAh consumed.

  • Set up to safely measure the current draw (amps) with the plane on the ground.
  • Determine amps from typical servo motion; by subtracting amps with servos not moving, from amps with servos moving.
  • Measure amps vs throttle position across the full range. BE SAFE DOING THIS.
  • Add the typical servo motion amps to measured values.
  • Re-scale the amps data to a range of -100 to 100, and use it to make a curve.
  • Create a new channel that applies this curve to the Throttle channel output.
  • Use the new channel as input for the Thr% timer. It will count time proportional to amps, and the elapsed time will be proportional to mAh used.
The initial time to set for this timer can be estimated by calculating how many seconds at the full-throttle current it would take to drain the number of mAh you are shooting for. Then start with something less (maybe 3/4 of it) to be conservative, and use test flights to dial it in.

I find this extremely useful for flying 3D foamies, where I have a dozen batteries that I parallel charge, which is best done when the batteries start at the same voltage . In my planes a battery can typically last from 3-1/2 to 7 minutes depending on how hard I fly, and using the Thr% timer with the amps curve assures that they all discharge to the same level with any flight style.

- John

Note: This method is probably used by others, but I haven't come across it spelled out completely. Some ideas for it were sparked years ago from the threads for Twisted Hobbys planes.
Posted by davymac | May 18, 2021 @ 03:08 PM | 31,210 Views
So I got a chance to do a quick test on my PineCil soldering Iron today

I decided to run it off of a 12V QC USB charger to see how well it would work. One thing I did notice was that it took a minute or so to negotiate the proper power from the charger before it would provide the full 12 (11.5 really) volts. Once it had done that though it was ready to go. I tinned the tip using some Loctite tip tinner before soldering and I set the iron to 350C as a starting temperature as I was using leaded solder. It's a bit on the high side but I wasn't sure of the temperature profile on the Iron so I decided to play safe at the top end of the temperature range.

I soldered up the pins on a LoRa 32 board as a test and it worked very well, especially considering the pads were tiny. I did have to break out the magnifying headset though, my eyes are getting old .

I am very happy with the Iron though, it worked very well and even though it wasn't a very heavy test of the unit, it still performed very well. I'll have to get a few more tips for it though. Not a huge fan of the conical type tips for soldering.
Posted by Amir3 | May 18, 2021 @ 11:29 AM | 30,891 Views
Finally the covering and some details to get a nice look. The decals are printed and applied as watertransfers.
The rigging and the build of the control wiring was also kind of tricky, but I hope it works the way I built it. Any way, I am ready for the maiden flight.
Wish me luck!...Continue Reading
Posted by Amir3 | May 18, 2021 @ 11:10 AM | 31,119 Views
After glueing all the ribs and wingroot I started the build with the wings. Upper and lower wing have some slight differences in construction, but basically the same. The lower wing is a bit shorter as it will be fixed to the fuselage. The upper wing will be fixed to a roof construction, wood and brasstubes.
Next step was the stabilizer. Very delicate and lightweight construction. I used some carbon rods instead of the bamboo skeewers provided with the kit.
The fuselage is also very lightweight, but astonishingly stable with this "crosswire" construction made of bamboo skeewers.
As the plane was intended to be motorized with a fuel engine, I had to reshape the front part for the electric drive. The engine is fake, made on my 3d printer.
Also the pilots were printed and then painted....Continue Reading
Posted by scousethief | May 18, 2021 @ 10:04 AM | 34,767 Views


In an effort to push boundaries Flywoo has designed one of the smallest 'off-the-shelf' hexacopters available - the Firefly Hex nano , a 90mm FPV drone designed to carry the Insta 360go . The Hex nano arrives pre-built and installed with a Caddx Ant 1200tvl and Nano 5v 450mW VTX , an extra connector has been soldered to the main board to supple power to your choice of HD camera. The Hex is powered by a GOKU HEX 13A STACK and 6x ROBO 1202.5 5500KV motors, the supplied props are 40mm HQprops , no battery was supplied

Brand: Flywoo

Item Name: Firefly hex nano ( without GPS Version)
Item Name: 90mm GOKU F4 13A ESC 4S 1.6 Inch Hexacopter
Wheelbase: 90mm
Camera Degree: 15į-90į
Weight: 57.9g (without battery)

...Continue Reading
Posted by Craycle Hobby | May 18, 2021 @ 09:08 AM | 28,731 Views
FPV ORCA test parts available on Cults3d for free. You can download now:

You can take a test print before buying for see the print details.

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