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Posted by marblekit | Jun 08, 2015 @ 01:32 AM | 3,220 Views
I recently acquired an never flown Multiplex Magister that had been sitting in storage for many years. It looked like a partially completed project that got shelved. I finished it up and flew it this past week.

This is a large plane. Over 64 inch wingspan and it is quite heavy.

Multiplex Magister Maiden (3 min 41 sec)

Posted by marblekit | Jun 04, 2015 @ 09:58 PM | 3,945 Views
This is the maiden of my Mini Skywalker "Redux". This is a scratch build made from parts scavenged from crashed/trashed planes. This is why I'm calling this plane "Flying Trash"

The wing is from my long dead Mini Skywalker. I almost threw away the wing but it was in good shape with only a few dents and breaks.

The motor is a Hobby King Donkey ST2204 1550kv that I got from my crashed Reaktor. The 12amp ESC is also from the Reaktor

The 5 gram servos (three) came from my crashed TechOne BF-109.

The rest of the plane is made from Dollar Tree foam board and a wood dowel that comprised the twin boom tail.

AUW is about 250 grams without the battery. I've tried various batteries from 500mah 3s to 1000mah 3s all with good success.

The prop on this maiden is a GWS 7x6 Slow Fly prop.

Mini Skywalker Maiden (2 min 30 sec)

Posted by marblekit | Jun 04, 2015 @ 11:06 AM | 4,116 Views
This is the third flight of my TwinStar clone. I put in a new giant nose wheel and now differential throttle is able to steer the plan on the ground. The nose wheel just casters.

The first flight my CG was still slightly tail heavy but not nearly as bad as previously. I landed the plane and moved the battery forward again and the second flight I finally found the proper CG for this scratch build!

After making a lot of tweaks and fixes, it finally flies pretty well. Happy pilot here!

TwinStar Clone Flight #3 (4 min 29 sec)

Posted by marblekit | Jun 02, 2015 @ 12:07 PM | 2,978 Views
The second flight of my TwinStar scratch build. I changed the props from 8x4 counter-rotating GWS HD props to 9x4.7 Gemfan counter-rotating multi-rotor props. It was not windy at all this day and I really didn't need the extra power.

I moved the battery forward about an inch to make the plane more nose heavy but it was still tail heavy when flying. The CG point was way forward on the wing... about an inch back from the leading edge!

It was still trying to roll to the left so I decided to land it and see what was going on. Turns out the right flap was warped and causing extra lift on the right wing.

On the landing I broke the nose gear for good and a wheel came off. I'll need to get a better nose wheel for the next flight!

TwinStar Clone Flight #2 (1 min 17 sec)

Posted by marblekit | Jun 02, 2015 @ 02:34 AM | 3,621 Views
This is the maiden flight of my scratch built TwinStar clone. This was not a good day to maiden a new plane. Way too windy! As I taxi for takeoff the plane immediately wants to roll to the left. This is not due to torque roll as the motors are counter-rotating.

I have to give it a lot of right aileron to counter this left roll. As soon as it gets about 10 feet up I immediate sense I have little control over the plane. It is obviously very tail heavy. It takes almost all I have just to keep the plane in the and not crash it. I desperately try to maneuver the plane for a landing.

The landing is very hard and I bent back the nose gear. I will have to make some repairs before trying another flight. Hopefully the next time it will not be as windy!

TwinStar Clone Maiden (1 min 51 sec)

Posted by marblekit | Apr 15, 2015 @ 01:10 PM | 18,382 Views
Flew my Gradian glider in a lot of traffic. Several other planes buzzing my slow moving plane! I am not able to get out of the way! LOL

Gradian in Traffic (4 min 52 sec)

Posted by marblekit | Apr 11, 2015 @ 11:58 PM | 3,400 Views
I built an Ugly Stick clone from DTFB with the paper off. It flew pretty well but the wings looked like they were flexing too much. I tried a roll to see how strong the wings were. They folded up right away.

Apparently if I want to do more aerobatic stuff I'll need to keep the paper on (and the extra weight).

Ugly Stick Clone - Build. Maiden, and Crash! (5 min 57 sec)

Posted by marblekit | Apr 04, 2015 @ 10:35 PM | 3,956 Views
This is Gradian Version 2.0

I dumped the wimpy 300mah 2s Lipo and upgraded to a beefier 500mah 3 cell Lipo.

Also switched the prop to an APC 6x4.

The difference is night and day. Now, it flies much, much better.

The CG is spot on and it glides extremely well. I was able to move around puttering on 30-40% throttle most of the time.

Came down after almost 8 minutes and the battery still had plenty of charge left. I will set the timer for 10 minutes next time.

It also helped that the wind was only 0-5 mph on this day.

Specs: 60 in wingspan. 27 in length, AUW increased from 178g to 205g
Motor: HexTronik 20g Brushless Outrunner 2300kv
Prop: APC 6x4
OrangeRX Receiver
Two 3.7g micro servos
10amp ESC
3s 500mah Lipo

Gradian 2.0 (5 min 4 sec)

Posted by marblekit | Mar 31, 2015 @ 11:38 PM | 6,725 Views
Posted by marblekit | Mar 31, 2015 @ 06:48 PM | 7,406 Views
I felt the Red Dragon was a little anemic on it's maiden flight with the 7x3.5 prop. So I upped the pitch to a GWS 7x6 SF prop. It has WAY MORE punch out and power now. Easily goes vertical and just goes bonkers crazy on the aerobatics. My favorite plane now!

I was way too conservative with the prop... too concerned about overheating the ESC or motor but even flying WOT for this flight, the motor and ESC were only slighty warm.

Red Dragon "On Steroids" (2 min 19 sec)

Posted by marblekit | Mar 27, 2015 @ 06:19 PM | 3,752 Views
Here's the maiden flight of the Red Dragon. She flies really well! I like this one a lot.

Red Dragon Maiden Flight (5 min 44 sec)

Posted by marblekit | Mar 25, 2015 @ 08:00 PM | 3,660 Views
Finally got around to editing my Gee Bee video. Had to cut out all the far away flight as this plane is small and turns into a speck on the video... Enjoy!

UMX Gee Bee R2 Flies Again (5 min 10 sec)

Posted by marblekit | Mar 24, 2015 @ 08:34 PM | 4,008 Views
I decided wanted a smaller wing to fly since my car is small and transporting a giant 40 inch wing takes up too much space!

Made a 30 inch version of the delta wing. 350g AUW with a Suppo 2212 1400kv motor, 7x35 GWS Prop, 20amp ESC, Lemon RX, 1500mah 3S Lipo, 2 9g servos

This time made two vertical stabilizers and also added winglets. Maybe this will increase stability... I guess we'll find out!

Spray painted the KFM doubler red and put on a dragon decal on the bottom. The dragon decal is from the dollar store kite I made into a plane earlier (I can't seem to throw anything away). Just cut to size and used 3M spray adhesive (that stuff is sticky as hell!)

Maiden video to follow shortly...
Posted by marblekit | Mar 14, 2015 @ 09:31 PM | 4,121 Views
Built this simple delta wing in about 2 hours based on a suggestion from Balsa or Carbon and I think I actually messed up the build as its not quite the same as his wing. However, my plane seems to fly "ok".

The winds were about 20 mph at the start of the session. By the end of the second battery, winds picked up considerably. 20-35 and gusty. It was time to quit for the day when the wind pushed the plane right into my car's windshield!

Based on the CG calculator I thought I had the CG in the right spot but it seems to want to pitch up when I throttle up... but when I cut throttle completely, it floats and glides slowly to the ground.... any idea what's up?

Video:
Black "D" Maiden (9 min 28 sec)

Posted by marblekit | Mar 10, 2015 @ 07:48 PM | 4,721 Views
When flying your plane it's probably a good idea to remember that your car is right next to you! I nearly crashed my Parkzone Archer right into my car... luckily I was able to pull up at the last second! LOL!

Archer vs Prius (0 min 43 sec)