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JureZ's blog
Posted by JureZ | Nov 08, 2014 @ 03:47 AM | 1,930 Views
This is my High Wing pusher - 54" wing span Chuck Glider conversion project.

This is the first concept, as built and flown a year ago.

It is based on the wing taken from the "ULTRA Flyer" foamie , available at HobbyTown for $8.

The 54" wing was reinforced with bamboo skewers and strapping tape.
The wing area was extended with the addition of fixed ailerons (which became true ailerons in the second version , the last picture attached below shows the version No 1.1 , with the ailerons implemented ).

The fuselage was made from 1 1/2" foam , scavenged from packaging material. You may see plenty of use of packing tape and gorilla glue.

The motor is a turnigy 2217-16 , link to 2217-16 , 3S , 20 A , 73g , Kv=1050 RPM / V , turning propellers in sizes from 9x6 to 10x4.7.
The servos are turnigy 9 gram , plastic gear type.
The battery is a 2200 mAh, 3s, 30C, weight =200 g =7.07 oz..

video: https://flic.kr/p/iwWjFM

PS: article continues with Airplane Version No 2 in the next comments page, please see below.

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Posted by JureZ | Nov 04, 2014 @ 04:50 AM | 1,896 Views
this photo gallery shows the flying site I use in Walnut Creek.
I call it "The Bald Mountain".

The hillside faces South, the prevailing winds are from the SW and W, which is very convenient for hand launching the planes into the cliff.

Access is a short hike of about 100 yards along the fire trail (dashed line in the Google maps photo view).

The trail is a bit too rough for a landing strip, but I have landed the SuperStar on it.
Mostly , the landings are "belly landings" on the tall grass.

As you may see, we enjoy the occasional visits from the local wildlife : turkeys, coyotes, deer, hawks, crows, etc...


....Continue Reading
Posted by JureZ | Oct 28, 2014 @ 01:17 PM | 1,462 Views
My implementation of the Vanessa CG machine.

found the attached construction document (pdf file) and decided I needed to build one.

I'll have to look up the thread where I found it in RCG ...click here for thread

Some pictures pasted below , to show its actual use with the mini Funtana.
Posted by JureZ | Oct 27, 2014 @ 12:57 PM | 1,852 Views
Hobbico Superstar EP


bought this airframe at a swap meet, for next to nothing.
Added new motor, ESC , receiver and servos.
After some time, landing gear , spinner , and a cowl made from a plastic bottle .

Finally , hired Felix as the pilot

Note: The Hobbico Superstar EP manual is attached to this post
Posted by JureZ | Oct 27, 2014 @ 11:21 AM | 1,940 Views
mounted the Mobius HD camera on a hard hat, as it is stronger and provides a more solid platform than other types of hats.

Went crazy with the stickers...


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Posted by JureZ | Oct 27, 2014 @ 08:47 AM | 1,718 Views
Magnetic prop balancer

built using a finger prop balancer ( bought from Uncle George, a fellow RCG member ), and two magnets scavenged from Hard Disk Drives, previously part of the voice coil head actuator.

If interested , I have a few sets of magnets to give away for free,

click here to see a short video of the prop balancer in action
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Posted by JureZ | Oct 27, 2014 @ 12:08 AM | 1,763 Views
Here are some pictures of the Mini Funtana I've got as a gift from Mike L (RCG member).

The plane needed just a little TLC to get in flying condition, and here it is waiting for the new maiden flight.

With the spare wing also provided by Mike , I would like to add a center section and use it as an aileron wing for the SuperStar EP.
This new section extends the wing span to 40"....Continue Reading
Posted by JureZ | Oct 26, 2014 @ 09:38 PM | 1,764 Views
My Static Thrust test fixture .


The Tachometer function is built around a Velleman infrared beam interruption kit , model MK120 ,
bought at Fry's for $8 , ( link to the MK120 kit ) , with some minor circuit modifications.

The digital scale is a Centech 1000g full scale unit bought at Harbor Freight.

The Fluke multimeter is set to the frequency , [Hertz] , measurement mode.

N [RPM] = 30 * Frequency [Hz] , in the case of a two blade prop.

To measure the battery current , I use a Simpson RMS Current Clamp meter

A servo tester is used to drive the ESC control input (bought from ED3, a fellow member of RCG).

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Posted by JureZ | Oct 25, 2014 @ 01:39 AM | 1,778 Views
just to get my blog started, here is a link to my flickr RC album:

Jure Z : my flickr album


click on the link above to see pictures and movies of my airplanes and equipment.