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Posted by RickC_RCAV8R | May 29, 2018 @ 03:42 PM | 2,258 Views
Gentlemen :

Been busy in the shop making cabinets lately and setting up a new garden are in front of the shop . Yardwork and gardening does not leave a lot of time for building models or their flying , but since my mate Dennis (cynr100) has laid down the gauntlet in doing a post , here goes .

The DennyCopter ! A Tcopter frame design by Dennis that uses the Rotorbits building system . The 3D print design for this frame was a collaboration effort and used the OpenScad CAD software . Dennis incorporated several features which aids in the connection of the RC equipment and polices up any interconnecting wiring . A major advantage of this frame is that it encorporates a 'break away' design which would minimize damage from any crashes . Although Dennis designed this frame for a typical 250mm sized tricopter , I decided to make a much larger 400mm frame using the central 3D printed mount . My DennyCopter ended up with an AUW of 650 grams which doesn't seem to be out of range as it uses larger motors ans ESCs .

The 400mm DennyCopter uses the Rotorbits yaw mechanism , KK2.1.5 flight controller runnning RC911 A08 firmware , RacerStar BR2216 motors and 30 amp generic type ESCs . This model will be twisting Gemfan 10 X 4.5 props as they worked well with an earlier designed tricopter in the 'YONI' .

The canopy was my design and was added onto later from a basic 'Plain Jane' design I printed earlier . This canopy has 'wrap around' interlocking slot which mates over Dennis' frame on the leading edge spars and fastens by a single screw in its rear . The missile pods of the underside of the canopy are large enough for housing any LEDs up to 5 Watts in their package sizes or a 5 volt laser module with ease .

Kudos Dennis on a great and effective design . I can see why your newbie following is requesting this one as their entry level machine .

Regards to Dennis , my readers and all who tend to push the envelope : RickC_RCAV8R
Posted by RickC_RCAV8R | Mar 08, 2018 @ 02:10 PM | 2,775 Views
Gentlemen :

One of my mates Blaine (The Iceguy) was cleaning out his shop recently and had a couple of plastic power tool cases that were destined for the dumpster . I couldn't resist grabbing these as I had a project in mind for them . A hard shell flight case !

The first stage of preparing the case is to use a cordless drill equipped with a milling bit to carefully remove the custom tool fitting structure from the outer case itself . This makes for the maximum room possible while retaining the case's structural integrity . Once that is completed , one needs only to use a new snap sharp blade to cut up the polyEthylene foam for the case interior . The foam I used was the packing from a Quanum Chaotic quadcopter . I was interested in the section of foam that dealt with the radio . Some careful cutting and planning , glueing foam parts with rubber contact cement and trimming will yield a cusomized interior that can easily handle the radio , several LiPos and some small tools .

Note that there is a protective shield for the LiPos near the carrying handle which was cut from a plastic covered notebook page leaf . The upper edge was folded in a small bar folder to produce a nice 90 degree fold . This shield is simply slipped between the foam and the outer case to hold in place .

The whole project from start to finish chewed up about 2 hours . Although not absolutely perfect , it turned out quite well and will become my 'grab and go' flight case for travelling to the club field . A second hard case is planned for the storage of 8 to 12 LiPo batteries .

Regards to my readers and my Aussie mates . And true to my motto of 'Waste Nothing' , salvage worx ! RickC_RCAV8R
Posted by RickC_RCAV8R | Feb 04, 2018 @ 01:30 PM | 12,522 Views
Gentlemen :

Since I received this model last week , I have only had one flight with it as the weather is not co-operating very much . This allowed me to read most of the extensive thread in the Electric Plane Talk forum found elsewhere on this website in the Convergence topic . There are a lot of mods posted in there , some of which are employed here . Although most of these mods are relatively simple in nature , the rear motor mount adapter seen in my previous posting was the major mod shown here . This adapter mod solves the rear motor centering with the rear duct and can only help to reduce , or negate the observed transition shuddering / shimmying seen .

The Mods Performed :

-- Add a VelCro strip in the battery bay to better secure the battery and provide a non-slip mounting .
-- Extend the battery power lead and route thru the forward hole provided for any camera wiring .
-- Use a battery voltage monitor with a high output buzzer .
Set this to trigger at a voltage level high than the
Low Voltage Cut Off .
-- Scuff up the motor shaft ends with emory paper to make for a better grip by the aluminum prop adapters .
-- Add a landing gear skid and secure with VelCro to make it adjustable for CG and overall balance .
-- Dress up the twin tails with customized markings for better visibility .
-- Remount the rear motor with the 3D printed adpter to correct the motor's centered height .
-- Upgrade the linkages with heli grade ball links and re-adjust the center-to-center overall lengths as near to 50mm as possible .

Additional maintenance related aspects were addressed like lubing the linkages and the forward motor mount bearings with graphite .

As with every modeler , performing any mods to a new model is a personal choice . For me , I decided to take the advice of the fellows that posted their thoughts and mods in the Convergence forum . Thanx to all for their experience and observations .

Regards to all of my readers , the flyers , builders and my Aussie mates . RickC_RCAV8R
Posted by RickC_RCAV8R | Jan 28, 2018 @ 03:17 PM | 2,900 Views
Gentlemen :

The posting yesterday of the rotary tool holder was the pretext for this intended project of a propeller cutter that I named The BullNoser . Although the pictures of this are in my shop's bench vise , the BullNoser is intended to be mounted on a plywood base or the bench top .

I FLY ! I bust a lot of props in the process . Learning the ACRO modes of flying for multi rotors does consume props . If I am lucky and don't bust a complete leaf off of the prop , I usually just zing off the tips in the dirt . Most times , this leaves props which can be shortened to a convenient diameter while ensuring a proper Bullnose radiused tip . This project makes that operation a snap ! Practically , it takes longer to mount the prop with an adapter to the 3mm center shaft than it does to cut down the prop itself .

A decision was made early on to have the central cross slider platform be made with a 3mm steel shaft that was salvaged from one of my crash victim motors . This shaft is press fit into the slider hole with gentle , but firm tapping with a hammer . A standard sized prop adapter is used to secure the prop to be cut down with perfect alignment . The slider IS adjustable for the prop leaf radius and has the ability to be locked into place to ensure accuracy . Future mods for this project would include a measuring rule but is optional at this point in time . Important to NOTE that the 8mm steel rods used for this project were salvaged from an old computer...Continue Reading
Posted by RickC_RCAV8R | Jan 27, 2018 @ 03:18 PM | 3,100 Views
Gentlemen :

25,000 reads on my blog . Thanx to all for this recognition mates !

As I am well into the winter build projects , the Anet A8 3D printer is working the majority of the time spent in the work shop . The project presented here is of a Rotary Tool Bench Mount for the Workmate rotary tool . The dimension of the internal sleeve is 49mm which required that I add a layer of electrical vinyl tape arount the rotary tool as a shim . This will protect the tool from the four 10/24 set screws holding it securely in place . The mount has 3/8" holes which may be used to bolt to a plywood base OR the work bench in a strategic location . Having the rotary tool mounted horizontally makes it easier for some jobs .

The project was designed in a few minutes using the OpenScad CAD program . I have included the STL printable file for printing . I hope that it will serve some of my fellow modelers well as it does for me . Any comments or feedback is always welcomed .

Regards to ALL of my readers , my Aussie mates and the builders in RC world . RickC_RCAV8R
Posted by RickC_RCAV8R | Nov 20, 2017 @ 02:47 PM | 4,277 Views
Gentlemen :

My mates Franky and Peter paid me a visit last weekend and I presented each of them with their snowsled skiers and the other gear like the radios and battery chargers . This allowed me to find new homes for some of the older radio gear that I had inherited over the years . The mates were blown away and are looking forward to racing these sleds this winter . As I want to WIN , I decided to make some mods to my frame to use a pair of ducted fans as the motivators . A test platform for an upcoming quadcopter project .

After installation , I decided to test the thrust of the DFs on the shop floor as there is not any snow on the ground outside the shop . Firing up the DFs presented a 'Holy S*#& !' kind of reaction as the sled shot itself across the room . It actually launched itself from the short cardboard box it was resting on at the time . The DF units are rated at 485 grams of thrust apiece . The AUW of the sled is 760 grams . But WOW ; what an acceleration ! Even on 3S power . 5700KV motors , I guess .

The mods that I designed were to mount the DF units and the rear stabilizer winglets . As these mods are not a part of the original downloaded 3D print model , OpenScad came in handy . The DF strut mounts are of a ROTORBITS compatible one that will be used on an upcoming quadcopter project .

The pix shown are of hte final sled , ready for racing when the snow arrives . Franky and Pete are going to have some competition !

Thanx for the blog support ! As always , comments are welcomed . My Aussie mates need not fret the fact of having now snow as this model will soon be further modified to accept wheels and floats . Regards to all of the builders : RickC_RCAV8R
Posted by RickC_RCAV8R | Oct 02, 2017 @ 06:29 PM | 4,203 Views
Gentlemen :

The Armadillo quadcopter I recently posted was sent to my mate Dennis (cynr100) in Cairns before I had the chance to fly it . Dennis has posted 3 videos of it in action since he completed the RC gear installations and performed a basic setup . He seems to like the way that this one flies and remarked that it was quite responsive although under powered with the DF units I sent with it . I believe that these fan units will be soon replaced with brushless motors instead . Very much looking forward to seeing the pix of that mod . Those would definitely give the Armadillo a boost in forward flight .

Seeing the video clips of this posted on Dennis' YouTube channel , I have decided to print off the Rotorbits compatible parts for one of my own . My quad will be using a newly purchased pair of AEO 50mm DF units which have 5700KV motors already installed . The specs boast a moderate 385 grams of thrust each on 12.3 volt power . Since the Armadillo's weight came in at around 670 grams , those DFs ought to make her skate !

The linx for Dennis' video clips posted on YouTube are :

Armadillo V-Tail Quad (4 min 42 sec)

Armadillo A-Tail quad (3 min 35 sec)
...Continue Reading