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Posted by jjmouris | Oct 29, 2015 @ 04:56 AM | 915 Views


Various Sergey props and 17.5x22 Saw 1 props.
50 each

New Enigma / Alex
with upgrade to RW2b full flying elevator, removable.
Spare stock elevator

RW2 wing with 4 servo's and SM speed sensor tube, has flown. Would work with Enigma fuselage.

Optipower 6S 3300mah 35C NEW. Fits Enigma / Alex.

As new 38mm GM 18x23 v2. Fits Enigma / Alex.

Hacker B50 - 67mm 3400kv with 6.7:1 gearing
Castle Creations P180 George modified for 6S
210 (two available)

Drop me a pm for a deal and shipping costs....Continue Reading
Posted by jjmouris | Feb 12, 2014 @ 09:49 AM | 5,426 Views
Many thanks to Georgi Mirov for making this possible. Without you my friend this would never have happened.

The planform design is my own, custom pitch distribution.

Nominal size is 17.5" x 20.8 @ 75% diameter.

Posted by jjmouris | Jun 03, 2012 @ 04:36 PM | 6,470 Views
So i thought i would share a little secret sauce from the F5B world for those who have no idea what all this stuff is about. Save you some work, make life a whole lot more easy. Some people don't want me to post this, and it is indeed a lot of invested time and effort i am about to share with you. You can buy me a beer some time.

End points;
For starters you have to realise that whatever you do with the signal coming from the TX is going to be between the end points you have set on the TX. If those end points are a long way beyond what the ESC is looking for, then your ramps will not take the amount of time / have the effect you expect them to have. So you might want to figure out where the end points need to be for your ESC before you start dialing things in to much. You can test this on the bench with a couple of cells less and no prop. When you have found the end points you need, you want to add a little extra for reliable operation.

Forward speed vs RPM;
The angle of attack (AOA) of a prop is what makes or breaks performance. Just like a wing, get the AOA to high and it will stall. There are two factors that determine the AOA during normal operation, the RPM and the forward speed of the plane. Fortionately unlike a wing, when the prop starts to stall it will only start to stall near the root of the prop blades and not stall completely. This means you still get a lot of thrust and just a small loss in efficiency. The bigger the part of the prop stalled, the lower...Continue Reading
Posted by jjmouris | May 14, 2012 @ 08:16 AM | 38,189 Views
Right, well i thought this would perhaps be a good location to collect data / ideas and so on.

The main concept may change as i go along.

The concept;

Make an open source firmware ESC capable of hardcore F5B abuse. Everyone can decide what firmware to use and modify things as they please. Lower the price of an ESC down to the parts + manufacture. No software provided, no guaranty. Proceed at your own parrel.

1ste phase;

Modify a cheap Chinese 200A controller to accept open source firmware. Probably what has been developed by SimonK for the multicopters or a little something from George Shering. Maybe add a little smoothing / ramp on the throttle input as we go.

The USBasp programmer
Red Brick 200A ESC
Red Brick 200A ESC with BEC
USB dongle

2nd phase;

Build our own controller to run with the above firmware. Use the same ATMega8 for the main processor. Upgraded mosfets and smaller form factor power boards. Likely to have a modular connector like the CC controllers. This would allow interaction with other projects from other people.

3de phase;

Build a new logic board with a better processor. Dependant on what processors become popular with the software writing community in the future.

If you are looking at my blog page, please click ''comments'' to continue reading.
Posted by jjmouris | Sep 23, 2011 @ 08:39 AM | 6,912 Views
(ESR = Electric Super Race)

Hi, thought i would open a blog rather then start a thread on this build.

The goal; build and fly a modern F3F/B with full competition F5B drive system.

This is not going to be another one of those lame electric conversions but instead this is going to be fast and furious. No compromise on the drive system. I won't be covering every single little detail of the build. Just some things that i am doing differently.

Parts list as it stands;

Viking 2 E Race (thanks Martin and Jiri)
4x Futaba S3150
2x JR DS285 MG (thanks Richard)
Hacker B50 special 67mm long 6 wind 3400KV with 6.7:1 gearbox
CC P180 fully George modified
Extra capacitor bank
Overlander Extreme 6S 5000mah 60C

I will add bits as i go along.

Feel free to comment on how crazy i am.