Suddenly after booking my flight and accommodation for the Spanish Championship and the European Championship in Los Nietos, I realized that my current Micromagic is almost 5 years old. Pretty old for a heavily used Micro over the years. As I still had some spare parts at home, collected over the past years, I decided to start the build of a new hull that would be strong enough for all weather conditions and travel. One of the requirements would be waterproof electronics… To tackle this item, I’ve ordered PlastiDrip. (applying this ‘drip’ will follow) For the Sail and rudder Servo I’ve chosen the SAVÖX SH-0255MG. Very good quality and strong I’m using this type already as rudder servo in my current Micro and Dragonforce.
The SAVÖX SH-0255MG is NOT suitable as Sail Servo!
After breaking down two (!) Servo’s, this one is really not strong enough.
As a rudder servo it is ok, so I’ll leave it installed as such.
I have to find another Servo for the sail part.
First candidate is the BlueBird BMS-380MaxMG. 6V-46 Ncm as been used in my ‘old’-RMM for years.
Second candidate is the Graupner C 5077 6V-50Ncm.
The inner parts (servo trays) and reinforcements will be of carbon tube and cut out carbon sheet. Nicely to cut with a Dremel. The glue to be used for the construction pats that will absorb the most load will be Pattex Stabilit (now UHU Plus Acrylit). The rest will be chemically welded with Acetone. Eye’s and hooks will be made of brass-wire. To withstand the Saltwater conditions. To fit the standard keel better, I added a little strip of ABS with Acetone between the two parts of the fin box. This widens the box a little. For now that’s all. I’ll update the build log when the next parts will be added. UPDATE: Carbon cutting has finished: The cutting tool: Update 2 – The PlastiDip The photo’s speaks for themselves. And finally the Receiver: Next step: glueing the fin box. Therefore i fixated the building mould level with a laser cross hair. Then fixed a carbon mast in the fin box and a carbon tube in the rudder position. Lined all up and added the Stabilit. Now let it rest for a while….. Water test under supervision of sesamestreet… Glueing the rest of the internals: PlastiDiping the Savox servo’s: It’s time to glue the hull and deck together. Strange thing happened: a part of the hull at the nose section appeared to be very thin and created some sort of bubble….. It took me some time to correct this, but it’s not like the original. We’ll see how it performs.
My son decided that the deck print of just white is a little to dull, it started with a Black pencil but soon red and blue markers came along. Result: an unique deck print for good luck 😉
So the final stage has arrived.
Fitting the electronics, sheeting, rudder, ‘old keel’ (new one is still not finished)
And ready for the “Maiden Trip” wednesday evening at Krimpen.
Wednesday 30 July was planned for the maiden trip.
So now the fine tuning can start.
The first test were interesting, as the boat speed could be better.
Sailing with the 717 / 1 / 1734 and 40 was somewhat in the middle of the results.
To get more control and a more stable handling I added some 66gr extra weight on top of the 66gr 5xaaa battery.
Well that improved a lot. Sadly half way during the evening my receiver broke down 😦 , a trip in the rowing rescue boat followed.
After returning home, I weighed the boat. result: WAY UNDER THE MINIMUM WEIGHT!
2.0 Weight of sail ready boat :
2.1 The minimum weight of a sail ready boat is 860 grams
My boat sail ready with A-rig without battery: 756gr !!!
Some correction weight had to be mounted………
Some informative info before starting with the keel:
3.6 The keel inclusive of the lead ballast may not extend farther than 135 mm from the hull.
3.7 The keel must be removable.
3.8 The filling, fairing and painting of the keel, ballast and rudder is permitted.
3.9 The ballast must maintain a circular cross-section along the entire length.
3.10 The weight of the keel assemblies (see appendix 1) shall not be less than 380 grams and not more than 420 grams.
3.13 The minimum distance between the leading edge of the keel and the front of the ballast shall be, 25mm for MKII – part 2014.4
Point 3.10 gives me some room for experimenting together with the low weight of the hull.
And finaly the keel :
Well that was another rainy and windy evening with the micro……
As a result, my Sail Servo broke down (read top of post) and my Futaba 6EX transmitter stopt working: No 2.4GHz signal.
The 2.4GHz signal led on the back doesn’t light up anymore.
Does anyone out there has a clue?
Are there 2.4GHz replacement boards available?
I think you can say that moist is not really a friend of electronics.
The first serious hit of water it received two months ago at the UK-RG65 Open. Although in a rain cover after a whole day in heavy rain, the moist has taken it’s tole.
So let’s find replacement parts or someone who can repair my transmitter.
Otherwise a new one has to be bought 😦
A new servo is mounted.
Old boat setup :
New boat setup :