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haiduk's blog
Posted by haiduk | Nov 24, 2013 @ 01:09 PM | 1,721 Views
For me, this years winter building season has begun. I have always wanted a 1/12 scale Douglas Dauntless dive bomber. I know there is an ARF kit available from Windrider, but I like to scratch build my own designs.

Check out the build thread here: SBD Dauntless Scratch Build
Posted by haiduk | May 26, 2013 @ 12:47 AM | 2,589 Views
I am intending on designing alternate wings for the SnickerSnee fuselage structure, a 1.5m powered glider wing and an aileron trainer wing. The idea is to have a platform that can grow with the pilot. Beginning pilots can start with the 3 channel Powered Glider wing to help them get used to orientation. Advance to training with ailerons and ultimately work with the aerobatic combat version. I scratch built this wing to use for powered glider testing. Overall I'm happy with the performance.



I took it out to the field a few days ago and let my Pops fly it. Asked him, "you like it?" He had a grin on his face, "yup." Asked him, "you want it?". Again, "yup." He has since put one of those gyro stabilizers into it. Has no problems landing on our runway in a cross wind. Fun plane.

Download the PDF SnickerSnee - Powered Glider Plans for free:

SnickerSnee-Powered Glider.PDF

Video of the Powered Glider Version of the SnickerSnee:
SnickerSnee Powered Glider (5 min 2 sec)



Will be busy designing a nice easy-to-build laser kit for the glider wing over the next several days.
If you're interested in following the progress, you can follow my progress on my website.

...Continue Reading
Posted by haiduk | Jan 14, 2013 @ 04:57 PM | 2,908 Views
Back in the day, my dad designed a slow-combat control line that he called the Snickersnee. In his honor I want to design, laser cut, and build a 400 sized electric stick for r/c streamer combat.

Pops original Snickersnee design was characterized by its diamond shaped wing tips and sharp corners. The slow-combat control line model looked very similar to this model I set up for the RealFlight simulator a while back:

My design process usually starts by drafting a simple scale drawing to import into 3DS Max so I can generate a 3D model for design testing in RealFlight. Once I'm happy with the shape and size of the flight surfaces and the handling in the sim I start designing the structure.

RealFlight G5.5+ Electric Stick Combat Planes:
- StickerSnee_EA
- StickerSnee (streamer cut)_AV
- Stevens AeroModel Shaft 400_EA
- Stevens AeroModel Shaft 400 (streamer cut)_AV

If you're interested in watching my design and build process, take a look at the build thread:
Stickersnee Design and Build Thread

SnickerSnee - Sport Combat Version: (3 min 46 sec)
SnickerSnee Sport Combat (3 min 46 sec)



Posted by haiduk | Dec 14, 2010 @ 12:34 AM | 5,312 Views
I've been busy getting some design work done.

Usually my design process includes building a model for RealFlight to test things like airfoils, wing incidence, dihedral, thrust angles, control surface size, etc. Once I'm happy with the flight characteristics in the simulator I can start designing and fitting the actual parts in 3DS. From there I can extract the parts out to AutoCad to lay out plans and set up templates to lay out on balsa and light ply or to set up G-Code for laser cutting.

This project will be a park sized sport plane with the classic lines of the AstroHog. I'm shooting for a 40" wingspan aircraft with a flying weight between 20 and 24 ounces. Should be able to power it with a 400-480 sized outrunner.

So far, I've got the model for RealFlight is completed and I like the way it flies. At this weight and wing area the flaps are really not needed, but they are fun. I've opted for slightly over-sized wheels for ground handling in grass.

RealFlight models:

MiniHog Tricycle version



MiniHog Tail Dragger version

Posted by haiduk | Aug 22, 2010 @ 01:34 AM | 5,986 Views
Just got this one mostly finished. Did several mods including rebuilding the wing saddle to fix the incidence, firewall mounted a 400 sized outrunner, built new landing gear pads, carbon fiber spar, glassed the inside of the fuselage to reinforce the wing saddle area (and slightly aft), bent new tail wheel wire, covered with light silkspan/WBPU.

I didn't like the idea of simply using velcro to attach the canopy so I modified that area and made the cockpit removeable to access the battery. Can get the lipo all the way up to the firewall easily.

My final flying weight came out at 15.8 ounces with the CoG right at 57mm with the battery all the way forward. I'm going to try the stock landing gear wire for the maiden flight, but I'm afraid it's a bit too wimpy. Will give the stock gear a shot before making gear doors. I'm thinking I will have to bend new gear from 3/32" music wire like most of my other GWS warbirds.

A cell phone video of the maiden flight:
Haiduk's GWS Zero Maiden Flight 8-22-2010 (1 min 42 sec)


(Photos are somewhat fuzzy due to the camera phone used to take the pictures)...Continue Reading
Posted by haiduk | Mar 15, 2010 @ 01:34 AM | 7,969 Views
Here's some build photos of my newest GWS bird. This one will have flaps, retracts and ailerons without exposed control horns. A three servo wing. I plan to keep it as light as possible, but after hogging all of the foam out near the root of the wing for the retracts and the extra servos I'm afraid the wing will fold. I've added a carbon fiber spar and plan on fiberglassing the wing root to help strengthen it back up.

I decided to add a short length of bamboo to the tips to keep them from snapping off during the first less than perfect landing. I used the Kavan Secret Hinges in the ailerons and customized the stock torque rods to drive the flaps. Again, I added a bit of 1/16" light ply to mount the Kavan hinges to get the strength back where I had to hog the foam out of the wing. I dropped the torque rods in from the top of the wing so the flaps will hinge at the top surface instead of the middle.

This is what I've got done so far. Wing weight at this point is around 4 ounces with all the hardware. I am planning on finishing this plane with ParkLite covering.

Follow the build thread.

** Updates **

Initial Control Surface Tests:
Haiduk's GWS Mustang - Initial Tests (0 min 49 sec)


Maiden Flight Video:
...Continue Reading
Posted by haiduk | Jan 31, 2010 @ 08:01 PM | 7,649 Views
Here's a short video of my latest Dollar Tree foam design. An SE5a.

I used the windex trick to remove the paper from the board and then re-covered it with ParkLite (Ultracote). No need for carbon spars with the covering and it doesn't add a whole lot of weight. Weighs about half what the paper does and more than doubles the original strength. In my opinion it's worth the bit of extra weight for the extra strength and rigidity.

Dollar Tree Foam SE5a (2 min 26 sec)



EDIT: Added PDF plans. Will start a build thread soon. Please post photo's of your SE5a's.


Note: The CoG in the plans is apparently incorrect. The plane should balance at the leading edge of the lower wing.
Posted by haiduk | Jan 20, 2010 @ 10:53 PM | 5,863 Views
I really enjoyed building this kit. Highly recommended!

Stevens Aeromodel RV-4

I ended up using a Rimfire 370 with a 9x6SF prop. ESC is a Thunderbird 18. I will be flying it with 1000-1320 mah 3S Lipos. Comes out to about 110 watts static on the meter. I used transparent black spray to smoke the canopy. I like the effect. Hopefully I will get a chance to maiden this weekend. It's covered with white and red ParkLite. I still need to open up a hole in the scoop underside of the cowling. Final AUW is 14.8 ounces with the wheel pants and 1000mah 30C 3S lipo.

I will post the maiden flight video hopefully this weekend.
Posted by haiduk | May 25, 2009 @ 01:49 AM | 6,023 Views
My GWS 190

Motor: Turnigy SK 3530 1100kv with 11x7 MAS prop.
ESC: Turnigy Plush 30 amp.
UBEC: Turnigy 5A
Radio: Spektrum DX6i with AR6200 receiver
AUW: 33.5 ounces
Mods: Full Flaps

Video:
Haiduk's GWS 190 Maiden Flight (3 min 4 sec)

As usual fairly gusty winds that night. Landing was a bit rough, but nothing broke. Had a nice head wind with flaps down for the landing approach that turned into a side wind that blew the plane off the runway and then stopped altogether causing the plane to fall from a couple feet up. No damage.

Agent K's video:
...Continue Reading
Posted by haiduk | May 25, 2009 @ 01:29 AM | 6,119 Views
Here's a video of my scratch built AmpMaster clone. Winds were fairly strong as usual this time of the year. I'm guessing 15-20 mph based on the Beaufort Scale. I have the plane balanced a bit nose heavy to handle the winds and for a bit of aerobatics. On calm days I move the battery back an inch or two to practice 3D stuff. Really is a nice flying, versatile plane.

Haiduk's AmpMaster Clone May 23 2009 (2 min 29 sec)


Build Log:
http://www.rcgroups.com/forums/showthread.php?t=1006468

RealFlight G3.5 version of this plane:
http://www.knifeedge.com/forums/down...o=file&id=9106

RealFlight G4.5 version:
http://www.knifeedge.com/forums/down...o=file&id=9059