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Showing posts from November, 2014

A world premiere ?

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Thierry Monnot 3D printed the fuselage master of his new VTPR plane called the Minilimande. After many hours of printing, and a cost of 40 euros of material, Thierry obtained this multipart fuselage.


The approach is very innovative, for a super result. The rest of the work remains usual with sanding, gelcoat before to obtain a final master to be moulded.

You can find more pictures and information on his blog: The Breizh Maker


Flying the Rotmilan Midi

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Read also: Part 1: Kit overview Part 2: Assembly
After testing many many F3F sailplanes over the last 20 years, I can say that I can split them in 2 main families: the "Slippy" and the "Grippy". The Slippy includes planes having a fast natural speed, even with low ballast. The grippy are  planes providing lots of lift in the turn and that can carry lots of ballast, and most of the time need a minimum weight to fly fast. The Rotmilan is part of the Slippy family, that is to say using a section which is more naturaly fast.



In small condition, the Rotmilan is fine but cannot do tight turns with low lift. It starts to breath in medium condition and is an easy and well mannered plane. In stonger condition, it doesn't need too much ballast, and can manage the crossed wind good.  The Rotmilan is also doing excellent bank and yank turns, very aggressively, where some other place doesn't like it. Energy management turns or half roll half loop turn are also possible…

Breaking news: New DS world record at 813 km/h !!!

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The 800 km/h barrier has been broken by Bruce Tebo flying his Kinetic 130 at Weldon (California) the 22th of November. After a first flight at 503 mph, Bruce improved it with 505 mph (813 km/h). For information, he doesn't use any gyro in his plane.









Fresh air and some snow !

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This afternoon, I went to col de Faisses again despite some snow falls the previous days. The ride to the top was a bit difficult because of the snow, even with a 4 wheels drive, certainly because of the summer tires. Temperature was cool, about 8 degrees, and conditions smooth, with around 6 to 8 m/s. I was alone adn had the entire slope for me :) !


I used the mobius action cam in photo mode, and timelapse to take to onboard picture with the cam attached at the wing tip. I also did some video with the mobius and also the GoPro on the ground.


Zepsus Magnetic BEC

Life, Lipo or more recent Li Ion receiver batteries are usually in 2S so deliver high voltage. However some servos released few years ago have not been designed to support high voltage and can at least reduce their lifetime when used with high voltage, or even can burn. Zepsus, well know for the magnetic switch that became very popular all around the world and equiping lots of F3X glider, recently released a new magnetic switch that includes a voltage regulator.

This Magnetic BEC features an impressive 14A max output current, operates with a 3 volts to 10 volts input voltage, is configurable to deliver 5, 5.5 or 6V output. It is compatible with all chemistry, from a 5S NiMh or NiCd to the more and more used 2S LiPo, LiFe, LiIon. The big advantage of the Lixx chemistry is that they can deliver higher current corresponding to the very demanding modern servos. The voltage regulation is linear, so what I would call RF friendly (ultra low RF noise) at the opposite of the usual U-BEC that …

[Movie] Interstellar

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Seen on RCgroups:

The opening sequence of the movie INTERSTELLAR with an indian drone flying alone over the fields was done using a 33% scale Predatorish miniature, 5.5 meters wingspan, weight from 10kg, powered by  a Neu propulsion sytems. The group of south california soaring modelers composed of Larry Jolly, Ben Clerx, James Turner, Dennis Brandt, Dean McCoy, Chris Jolly, and Anya Ellis all pitched in, and helped get things done in time..

For information, Larry also participated to the movie Armagedon, and plenty of other nice project in Hollywood !

The full story can be read here

Interstellar is a super movie from Christopher Nolan, with a nice story (A group of explorers use a newly discovered wormhole to surpass the limitations on human space travel and conquer an interstellar endeavor.), excellent actors, superb visual effects. It lasts almost 3 hours, but the time passes very quickly. I really recommend it !




3D printed radio installation

Today, I could see a very nice radio installation in a Electro Alpina 4001. All the different part have been 3D printed. The servo tray use an inner honeycomb structure. the propulsion battery support can move to change the center of gravity. The orange box host the receiver and the power switch. I have no picture, but the servos covers were also 3D printed. All parts uses PLA material and are made on a printer having a volume of 20cm x 20cm by 15cm for the height. The result is very neat and clean as you can see on the pictures.


2 new color schemes for the Vagabond

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2 new color schemes for the Vagabond from Hacker Model. The honeycomb is very popular now ;) !

VV Stinger

While the Stinger 2 is about to be released soon, here are pictures about the kit of the Stinger. This one is not belonging to me, but stayed at home for few days before to be delivered to his happy owner.


Col de Faisses

Some pictures taken at col de Faisses the 1st of november. My F3F planes stayed in the car and I flew only my Weasel Black Edition. Other planes were mostly powered as the conditions were very light. Still a nice and cool afternoon with a super light for pictures.


2 weeks before, I had another session there where I could meet some pilots from Lyon area. Conditions were much better.


Aerial pictures: Castle of Bon Repos

While some stupid people are flying with drones over french nuclear power plants, there are many better things to do with a quadricopter like photographying the Castle of Bon Repos near Grenoble. The Quad is aTBS discovery and the cam is the GoPro3 black edition in timelapse mode. From the 580 pictures taken, I selected only 33 to create this photo album.


Zepsus Magnetic BEC

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Zepsus just released a new product called "Magnetic BEC", which combines a magnetic Switch and a 5-6V linear voltage regulator. It allows to power a F3x glider equiped with Low Voltage servos from a 2S Life/Lipo/LiIon battery. It is available in 2 versions: 14A for F3x plane and 5A for HLG gliders. Given the excellent quality of Zepsus products (I have 5 Zepsus magnetic switches in my F3F planes), there is no doubt that this new Magnetic BEC will be a best seller !

More info at http://zepsus.com/


Rotmilan Midi Assembly

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Note: you can read the first part here: kit overview
The rotmilan doesn't reserve any real surpise during the assembly. There are however some particular points to to take care so I will develop. On the fuselage, the most delicate operation is the wire routing from the front of the fuselage to the green plug print location. Because of the bassat tube already in place, there is very little remaininf space on each side to route the 4 wires. They must be under the ballast tube, then go on the side to reach the wing plug hole. Here is the technic I used. I prepared the servo wires, around 45 cm long (the standard 30cm servo wires is too short). then using a thin piano wire (0.8mm) or a thin plastic sleeve, I passed it from the joiner location to the fron of the fuselage, then taped the wire extremity to it, and pull carefully until the wire exits. You need to do it 4 times (2 on each side), given that the second wire has even less space since the firt one is in place. Doing like this,…

French F3F League

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Hereafter are some pictures of the 2 last contests of the french league. First of all the Vosges 2 contest beginning of October, where ae flew on Staurday in very variable an light conditions on the south west slope. Aubry Gabanon won the competition on his FS 4.3, taking a good option on the league victory. He is followed by Arnaud Leger (Pike Precision) and Elian buchholtz (Arsen).



Last contest of the french league was the week after in Laurac. After 12 rounds and an hard battle between Aubry Gabanon (FS 4.3) and myself (Shinto and Pike Precision slim), I missed the contest victory by 4 points over 1000 at the last round, and as consequence, the french league winning by 9 points (over 4000). Aubry deserved his victory as he piloted very well and did no mistake. congratulations to him ! S├ębastien Lanes (Target and Stinger) is finishing in 3rd position of the contest after a very good climb the second day. JB Deguelle is 4th and Frederic Hours is 5th. A great contest, with good weathe…

Real size gliding at Saint Eynard

Last sunday afternoon, I went to the Mont Saint Eynard, above Grenoble to see real size glider doing slope soaring along the cliff. Impressive, especially the noise. Few days ago I was in the plane (Taurus), this time I was on the ground. It was mainly ASK13, but I saw also a duo discus. Nice moment !


F3F Season ended

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F3F season 2014 is finished for me. It has been a great season with nice results:
- Team world champion  in Donovaly (F3f WC) - 5th in individual at the same F3F worlds - 4th at the Eurotour, only 0.07 points from the podium ! - National F3F champion 2014 (7 titles) - Second of the french F3F league - New personnal best time with 28.01s (Needle 100 DSL) - 1 worldcup/Eurotour contest victory at Col de Tende
I would like to warmly thanks my sponsors MKS and JR. DMSS 2.4 is rock solid and new MKS HV servos are just incredible. The HBL 6625 is for me the best wing servo ever ! With the new HBL 6625 mini, the 6125e HV and the 6100 HV, without forgetting the 737 HV and the 747 HV, the family is now large and provide a solution to each situation.