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jetset44's blog
Posted by jetset44 | Jun 28, 2009 @ 03:01 AM | 104,845 Views
This model is a foam parkflyer adaptation of Laddie Mikulasko's beautiful Northstar seaplane. I named it Polaris to pay homage to the original (for those that don't know, Polaris is the astronomical name of the real North Star). This design is mostly faithful in outline to the original, but I did make a few modifications to adapt it to foam construction, electric propulsion, and to better suit the parkflyer role. This model handles beautifully in the air, and is smooth, stable and very aerobatic. It also has excellent water manners--tracks well, steers well, and lifts off effortlessly. It also flies well off of snow or grass, making it a very versatile model.

Specs:
Wing area: 343 sq in
Span: 29.0"
Length: 38.4"
Weight RTF: 20 oz
Wing loading: 8.4 oz/sq ft
Motor: Grayson 2212-06
Battery: Thunder Power 2100 mAh 11.1V Prolite
Prop: APC 6x4
Current: 22 amps
Watts: 240 watts
Power loading: 190 watts/lb
Flight controls: Elevator, ailerons, rudder

I used a Grayson 2212-06 motor, which is a perfect match for this airframe. It provides 1.3:1 thrust-to-weight ratio for unlimited vertical and roughly 70 mph top speed. Plus the small 6" diameter prop keeps the thrust line low to minimize the effects of the high thrust line. This model was designed to accommodate up to a 7" diameter prop—just mount the motor at the bottom of the firewall if using a 6" prop and at the top of the firewall if using a 7" prop.

When set up as...Continue Reading
Posted by jetset44 | Jun 28, 2009 @ 02:47 AM | 108,819 Views
This is a fun model that is absolutely unmistakable in the air due to the forward swept wing. It's sized similar to my other park jets and uses the same construction methods and power systems. While this model has a few quirks in the air and is not a hands-off airplane, if you stay ahead of it it does fly well and is smooth and fun to fly. And it's definitely different!

Specs:
Wing area: 217 sq in
Span: 28.1”
Length: 46.4”
Weight RTF: 20 to 23 oz
Wing loading: 15 oz/sq ft
Motor: Littlescreamers Super Park Jet
Battery: Thunder Power 2100 mAh 11.1V Prolite
Prop: APC 7x5
Current: 19 amps
Watts: 185 watts
Power loading: 130 watts/lb
Flight controls: Canard, aft strake flaps, ailerons, rudder (optional)

My model is powered by a Littlescreamers Super Park Jet motor, which provides unlimited vertical and around 70 mph top speed. Another unusual aspect of this model is the pitch control--canard, elevons, and aft strake flaps are all mixed together. This sounds complicated but is really quite easy to set up with a good computer transmitter. Simpler setups are possible, but I found this setup provides the best overall control.

If you build this model, be forewarned of one thing—just about every time you take it to the flying field, some wisecrack will yell, "Hey WAIT, you've got the wing on BACKWARDS!". It's funny how many times that has happened to me already…

Build thread: http://www.rcgroups.com/forums/showthread.php?t=838414

Flight...Continue Reading
Posted by jetset44 | Jun 27, 2009 @ 03:04 AM | 115,086 Views
This is one of my all-time favorite park jets. It is smooth and graceful in the air, yet when pushed hard demonstrates incredible agility—just like the real Su-37 in the many videos posted on YouTube. This model features a working 3-axis thrust vectoring system (pitch, roll, and yaw) just like the real thing. With the TV system off, this model handles as well as any other park jet I've built and is well-mannered and easy to fly. But with the TV system on, it can do wingtip flips, incredibly tight turns and loops, and wild tumbling maneuvers. The TV system also provides excellent controllability at low airspeeds and high alpha.

Specs:
Wing area: 290 sq in
Span: 30.0”
Length: 43.2”
Weight RTF: 22 to 28 oz
Wing loading: 11 to 14 oz/sq ft
Motor: Two Littlescreamers Park Jet (LSPJ)
Battery: Thunder Power 2100 mAh 11.1V Prolite
Prop: APC 6x4 regular and pusher (counter-rotating props)
Current: 36 amps total
Watts: 350 watts total
Power loading: 220 watts/lb
Flight controls: Tailerons, rudder (optional), thrust vectoring (optional)

This model was designed specifically for two Littlescreamers Park Jet motors so it’s sized slightly larger than my other park jets, with 290 sq in wing area instead of 250 sq in. This motor setup provide fantastic performance--top speed in the neighborhood of 80 mph and 1.5:1 thrust-to-weight ratio for unlimited vertical. Plus the counter-rotating props cancel out prop torque, resulting in very smooth launches and more jet-...Continue Reading
Posted by jetset44 | Jun 26, 2009 @ 02:25 AM | 132,792 Views
The goal of this model was to capture the unmistakable look of the F/A-22 Raptor in an easy to build semi-scale model that could be flown in small fields. This model features a functional thrust vectoring (TV) system in the pitch axis, just like the real F/A-22. The TV system provides incredible maneuverability, enabling tight turns and loops, flips, tailslides, and greatly enhanced pitch control at low speeds/high alpha. The TV system is electronically mixed to the stabilators using transmitter mixing, and can be turned on and off in flight with a switch. The TV system is completely optional and can be omitted to simplify the model (this model is just as manueverable as any of my park jets without it).

This model is quick on the controls, but is stable, well-mannered and easy to fly. It was sized and designed specifically for the Littlescreamers Park Jet Special motor, though other motors could also work. Construction is similar to my other park jets, but is a little more complicated since it requires a lot of bevel cuts and extensive heat forming of the 3mm Depron upper fuselage.

Specs:
Wing area: 248 sq in
Span: 26.0"
Length: 36.3"
Weight RTF: 16 to 18 oz
Wing loading: 10.5 oz/ft2
Motor: Littlescreamers Park Jet Special (LSPJ)
Battery: Thunder Power 1320 mAh 11.1V Prolite
Prop: APC 6x4
Speed control: Castle Creations Phoenix 25
Current: 15 amps
Watts: 150 watts
Power loading: 140 to 150 watts/lb
Flight controls: Stabilator,...Continue Reading
Posted by jetset44 | Jun 25, 2009 @ 02:22 AM | 102,577 Views
The design goal of this model was to be a semi-scale parkflyer that also had good 3D aerobatics capability. The end result met all my expectations, and is one of my favorite RC models. When throttled back and flown slowly, this model looks remarkably scale in the air and is a really nice-flying parkflyer. But when you throttle up and put the sticks in the corners, in can also do some wild gyrations and great aerobatics. When I fly this bird at my local park, I like to surprise onlookers by flying really slow and scale-like for the first minute or two, and then let loose all of a sudden with wild aerobatics!

Specs:
Wing area: 575 sq in
Span: 36.5 in
Length: 30.1 in
Weight RTF: 21.0 oz
Wing loading: 5 oz/ft2
Motor: Axi 2217/20
Battery: Thunder Power 11.1V 2100 mAh Lipo
Prop: APC 12x6 SF

The Axi 2217/20 is the ideal motor for this model, since it provides 1.5:1 thrust-to-weight and swings a near-scale diameter prop (12x6). And it's really cool that the spinning outrunner motor is similar to the spinning rotary engine used in the original Triplane. This design started with a true scale outline, but I made several deviations from scale to improve the buildability and flying qualities:

* Flat foam airfoil for easy construction and great aerobatics
* Ailerons on all 3 wings for insane roll rate and better roll control while hovering. Plus, this allows adding camber to all three wings (i.e., flaps) in improve slow speed stability and control.
* Enlarged...Continue Reading
Posted by jetset44 | Jun 25, 2009 @ 02:06 AM | 106,997 Views
This is an EDF model of NASA’s X-31 Enhanced Fighter Maneuverability Demonstrator, which flew in the early 1990’s. The X-31 had a thrust vectoring system that provided greatly improved post-stall and high alpha maneuvers. This model also features a thrust vectoring system, though I used vanes instead of paddles in the exhaust flow since they work better at model scale and are easier to build and set up. The X-31 park jet features simple foam construction similar to my other pusher prop park jets, and is very quick to build. In flight this model is very quick on the controls, but generally handles well and is fun to fly.

Specs:
Wing area: 144 sq in
Span: 20.5”
Weight RTF: 13.5 oz
Wing loading: 14 oz/ft2
Motor: Hyperion Y22S 5000 kV
Fan: Wemotec Microfan
Battery: Thunder Power 11.1V 1320 or 2100 mAh Pro-lite Lipo
Current draw: 20.0 amps static
Power input: 200 watts
Power loading: 240 watts/lb
Electronics: Hitec Electron 6 Rx, Phoenix 25 ESC, 5 GWS Pico servos
Flight controls: Elevons, canard, rudder, pitch control vane, yaw control vane (5 servos total)

This model was designed for the Wemo Microfan (50mm diameter), but I've also attached plans below that are scaled up 145% to fit the Wemo Minifan (68mm diameter).

The first flights of this model revealed a minor tip stalling problem at high alpha, and since high alpha is what this model is all about I designed a modified wing to try to improve the situation. The new wing did indeed improve high...Continue Reading
Posted by jetset44 | Jun 21, 2009 @ 02:53 AM | 99,997 Views
OK, this one is just plain silliness. One Saturday night at 10 PM, I was sitting in my recliner watching TV and drinking beer when I had an idea for a new airplane. I went out to the garage, scrounged some materials, completely built it, and then flew it at 11 PM in my front yard (under the street light). And it FLEW!

Seriously, this model is based on a similar one I had 20+ years ago, which consisted of a small block of wood, two old socks, and a Cox .049 Babe Bee engine. It also flew great! So the only new idea here was to make it a foamie RC electric using a CD-ROM motor. But the coolest thing about the new version is that it has throttle capability to control altitude (the old Cox .049 version was a "launch it and run for your life" deal!).

This model is a ton of fun, but it's very hard on motors since every landing is a one-point landing. So fly it in tall grass if you can to help cushion the landings.

Here are the parts I used for this CD-ROM sized version:

* 2 laminated pieces of 2” x 4” Bluecore in the middle
* 2 laminated pieces of 2” x 2” Bluecore on the sides
* 2.5” basswood motor mount in the center
* Two ½” wide strips of lite ply on the sides to screw the socks into
* Two dirty old socks (the older and dirtier the funnier!)

Build thread: http://www.rcgroups.com/forums/showthread.php?t=368321

Flight video:
Dirty Old Sock Parkflyer (0 min 31 sec)

Posted by jetset44 | Jun 21, 2009 @ 02:38 AM | 116,538 Views
Soon after I released the Super Bandit, I got a request from a fellow Ezoner to design an EDF version—and he even sent me a Wemo Microfan to prime the pump! Needless to say, his bribe worked. Not having any prior experience with EDFs, I set out to learn and this was my first EDF design. I haven't built one myself yet, but I hear it flies well. I've posted pics of some of the models others have built below.

This model was sized specifically for the 50mm Wemo Microfan, but it can be scaled up to any fan by simple scaling by the square of the FSAs (fan swept area) of the two fans. That's the most accurate way to scale (since it preserves the critical inlet and exhaust ratios), but you can also approximate it by scaling by the square of the fan diameters. I've included plans below that are scaled to accommodate the 68mm Wemo Minifan.

Specs:
Wing area: 124 sq in
Span: 24.2 in
Weight RTF: 12 oz
Wing loading: 14 oz/ft2
Fan unit: Wemo Microfan
Flight controls: Flaperons (or ailerons), elevator

Build thread: http://www.rcgroups.com/forums/showthread.php?t=436290...Continue Reading
Posted by jetset44 | Jun 21, 2009 @ 02:32 AM | 100,356 Views
This is one of the few designs I've shared but never built. It was designed in response to a request from a friend, and I just never got around to building one. Nevertheless, I hear from other builders it's a great flyer! It uses all the same construction methods and motor setups as my other park jets. I've posted pics below of a few nice models that were built by other folks.

Wing area: 220 sq in
Span: 32.3 in
Length: 45.4 in
Weight RTF: 16 to 20 oz
Wing loading: 11 oz/ft2
Motor: Grayson 2212/26
Battery: 2100 mAh 11.1V Lithium-polymer
Prop: APC 6x4E
Flight controls: Flaperons (or ailerons), elevator, rudder (optional)

Useful links:

Build Thread: http://www.rcgroups.com/forums/showthread.php?t=434976...Continue Reading
Posted by jetset44 | Jun 20, 2009 @ 02:03 AM | 103,784 Views
The F-14 is easily the most popular of all the park jets I've developed. Everybody loves the full-scale Tomcat (due in no small part to the movie Top Gun!), and an easy to fly parkflyer version of the Tomcat was bound to be popular. While an absolute pussycat in the air, the F-14 is one of the more challenging park jets to build due to the wing sweep mechanism. But it's not hard to build. If you haven't built a park jet before, I'd recommend starting with the F-15 or similar first to learn the basic techniques, and then try the F-14.

Specs:
Wing area: 220 sq in
Span: 40.7” fully unswept, 24.7” fully swept
Length: 39.8 in
Weight RTF: 20 to 24 oz
Wing loading: 14 oz/ft2
Motor: Himax 2015-4100 with 4.4 gearing
Battery: Thunder Power 11.1V 1320 mAh Lipo
Prop: APC 9x7.5 SF
Flight controls: Tailerons, wing sweep, rudder (optional)

The flight characteristics of this model are excellent. It is very aerobatic, has a wide speed range, and is smooth and predictable in flight. It is well-mannered at both low speeds and high speeds, and with the wings both swept and unswept. As you would expect, there are significant differences in how this model handles with different wing sweep angles. With the wings fully unswept, it responds quickly in pitch but is a little sluggish in roll. With the wings fully swept, it is a little sluggish in pitch but lightning quick in roll. For me personally, I’ve found that a mid-sweep position seems to offer the best control harmony...Continue Reading
Posted by jetset44 | Jun 20, 2009 @ 01:51 AM | 109,333 Views
The Gripen has always been one of my favorite park jets, for two reasons: 1) it is extremely maneuverable at low speeds (tight turns, low-level aerobatics, high alpha), and 2) it looks downright sinister in the air with it's double-delta canard layout, almost like a spaceship. The top end speed and general handling qualities are very similar to my other park jets, and it uses the same construction methods and motor setups as my other jets.

Specs:
Wing area: 258 sq in
Span: 23.9 in
Length: 42.3 in
Weight RTF: 16 to 20 oz
Wing loading: 10 oz/ft2
Motor: Axi 2212/26
Battery: 1320 mAh 11.1V Lipo
Prop: APC 9x7.5 SF
Flight controls: Elevons, full-flying canard, rudder (optional)

The Gripen can flies quite well with elevons only (fixed canard) and canard only (with ailerons), but mixing both together (canard/elevons) provides the ultimate in maneuverability. Rudder is also very nice to have on this model to provide directional control at high alpha.

Useful links:

Gripen Construction Guide: See attachments below

Build Thread: http://www.rcgroups.com/forums/showthread.php?t=308830...Continue Reading
Posted by jetset44 | Jun 18, 2009 @ 02:49 AM | 111,107 Views
This model uses the same construction methods and motor setups as the F/A-18 and F-15 park jets. Normally, models of the T-38 are challenging to build and fly, but not this one. It's quick and easy to build and handles beautifully in the air—smooth, stable and very graceful. And best of all it is a true parkflyer and flies well in small fields. It's one of my favorite and most-flown park jets.

This model can be easily converted into an F-5, and templates for the parts required are provided below. These include a new canopy (which is interchangeable with the T-38 canopy), wing root strakes, and wingtip missile rails. A few enterprising individuals have even converted this T-38 into an F-20 Tigershark--see the build thread below for more details.

Wing area: 218 sq in
Span: 28.2 in
Length: 45.4 in
Weight RTF: 16 to 20 oz
Wing loading: 11 oz/ft2
Motor: Littlescreamers Super Park Jet
Battery: 1500 to 2100 mAh 11.1V Lithium-polymer
Prop: APC 7x5E
Flight controls: Wing flaperons, full-flying horizontal stabilizer, rudder (optional)

Useful links:

T-38 Park Jet Construction Guide: http://www.parkjets.com/T-38_Park_Je...tion_Guide.pdf

Build Thread: http://www.rcgroups.com/forums/showthread.php?t=306817

Flight video: This is one best park jet flight videos I've ever seen--from Steevie in Switzerland: http://www.parkjets.com/T38_II.wmv And here's another good one from Steevie: http://www.parkjets.com/steevie-t38.wmv

Kits available from: www....Continue Reading
Posted by jetset44 | Jun 18, 2009 @ 02:24 AM | 118,463 Views
This was my second park jet, and uses the same construction methods and motor setups as the F/A-18 Park Jet. The F-15 is the easiest of all my park jets both to build and to fly, so it makes an ideal first park jet (or built-up foam model in general). When built light, it's a very docile flyer—in fact, there's at least one guy in the build thread that built this as his first RC model and learned to fly with it! Before attempting any of the more complex park jets (like the F-14 or Su-37), I always recommend building the F-15 first. The F-15 is so simple and has so few parts that it can easily be built in a weekend.

I've attached scaled plans below in the most popular sizes.

Specs:
Wing area: 257 sq in
Span: 27.9 in
Length: 42.3 in
Weight RTF: 16 to 20 oz
Wing loading: 10 oz/ft2
Motor: Grayson 2212/16
Battery: 2100 mAh 11.1V lipo
Prop: APC 6x4
Flight controls: Wing flaperons, full-flying horizontal stabilizer, rudder (optional)

Useful links:

F-15 Park Jet Construction Guide: See attachments below

Original Build Thread (now closed): http://www.rcgroups.com/forums/showthread.php?t=289276

Current Build Thread: http://www.rcgroups.com/forums/showthread.php?t=479660

Kits available from: www.6mmflyrc.com or www.3dfoamy.com

Decals: GotrekGurnisson has developed several BEAUTIFUL decals sets for this model. They are available for free on his RC Groups blog: http://www.rcgroups.com/forums/member.php?u=89637

Construction article published in:...Continue Reading
Posted by jetset44 | Jun 16, 2009 @ 02:08 AM | 119,076 Views
This was my first park jet. The design goals for this model were semi-scale looks combined with quick foam construction and true parkflyer performance. It was originally designed to use the GWS EPS-350 brushed motor (back when brushless motors were expensive!), but today the ideal motors for this model are the Grayson 2212/06 or Littlescreamers Super Park Jet.

This design has proven remarkably adaptable, and can be built either super simple and lightweight (in a weekend even) or decked to the hilt with flashy paint, cockpit details, and ordinance. It has also been successfully scaled down to 50% and up to 200%, and several sizes in-between. I think the most common scaled sizes are 75%, 120%, and 150%, so I've attached plans below in those sizes.

Specs:
Wing span: 28.4 in
Wing area: 252 sq in
Length: 41.7 in
Weight RTF: 16 to 20 oz
Wing loading: 10 oz/ft2
Motor: Grayson 2212/06
Prop: APC 6x4
Battery: 2100 mAh 11.1V lipo
Flight controls: Flaperons, full-flying horizontal stabilizer, twin rudders (optional)
Materials used: 6mm Depron or BlueCore foam

Useful links:

F/A-18 Park Jet Construction Guide

Original Build Thread (now closed)

Current Build Thread

Kits available from: http://www.3dfoamy.com/ (note www.6mmflyrc.com also makes an F/A-18E Superhornet kit that is based on my F/A-18C)

Decals: GotrekGurnisson has developed several BEAUTIFUL decals sets for this model. They are available for free on his RC Groups blog: http://...Continue Reading
Posted by jetset44 | Jun 16, 2009 @ 01:52 AM | 110,582 Views
This is a simple profile model of the Sonic Cruiser concept Boeing developed back in 2000-2002. It's built entirely of BlueCore foam and is powered by two GWS IPS motors mounted pusher-style on the back of the nacelles. Control is provided by ailerons on the aft wing and a full-flying canard. Despite its racy appearance, this model is actually quite docile and easy flying. And due to the very light wing loading, it can easily fly in a baseball diamond-sized field. This model has special appeal to me because I spent three years of my career as a design engineer on the Sonic Cruiser program.

Specs:
Wing span: 30.9 in
Wing area: 242 sq in
Weight RTF: 10.5 oz as pictured
Wing loading: 6.3 oz/sq ft
Motor: Two GWS IPS with A gearing
Prop: GWS 8x6 slowflyer
Battery: 3s 1000 mAh Li-Po
Radio equipment: GWS R4P receiver, GWS Pico BB servos, 10 amp ESC

Build thread:
http://www.rcgroups.com/forums/showthread.php?t=249669...Continue Reading
Posted by jetset44 | Jun 13, 2009 @ 01:33 AM | 95,701 Views
This was the first airplane design I ever posted on RC Groups, back in 2004. It is also my all-time favorite RC model, and probably always will be. The VTO is the ultimate close-quarters model, and can be flown in incredibly tight spaces under complete control. I usually fly mine in the street in front of my house or in my driveway, but if it's raining I have also flown it inside my two-car garage. Once I even took it to work and flew it in a conference room at lunch! Of course, all you can do is hover and harrier in spaces that tight…

The VTO is incredibly maneuverable and is the easiest model to hover and harrier that I've ever flown. It also does beautiful hovering flat spins right at ground level. But the signature maneuver for this model, of course, is the vertical takeoff and landing. The vertical takeoffs are easy (just throttle up and go!), but the vertical landings are very challenging and take lots of practice—and even then can only be done in calm conditions.

The regular VTO (30" span) was sized for 150 Watt motors and the Mini VTO (20" span) was sized for 75 Watt (CD-ROM type) motors. Both were originally designed to achieve 1.5 thrust-to-weight ratios using cheap brushed motors (GWS EPS-350C and GWS IPS-A), but both my models are now powered with brushless motors and have a thrust-to-weight ratio of well over 2:1.

Regarding the plans, I think it's easiest and quickest to just draw the wing directly onto foam sheets using the...Continue Reading
Posted by jetset44 | Jun 13, 2009 @ 01:22 AM | 93,818 Views
Welcome to my blog! I plan to use this space to provide one-stop shopping for all of the model designs that I've developed and published on RC Groups over the past few years. While most of this info is already posted in the build threads, some of those threads are now thousands of posts long and several years old, and it's gotten hard for folks to find important info and make sure it's the latest and greatest. I've received several requests recently to consolidate all this info in one place, and this seemed like an easy and quick way to do it.

In addition to posting the latest plans, I'll also include lots of other info for each design, like construction guides, photos, videos, thread location, decal files, kit availability, magazine articles, etc. I also get a lot of requests for scaled plans for many of my designs, so I'll include several of those as well in the most popular sizes (usually 75%, 120%, and 150%).

Here's a list of all the designs I've posted on RC Groups so far (in chronological order):

1. VTO/Mini VTO
2. Boeing Sonic Cruiser Parkflyer
3. F/A-18 Hornet Park Jet
4. F-15 Eagle Park Jet
5. T-38 Talon Park Jet
6. JAS 39 Gripen Park Jet
7. F-14 Tomcat Park Jet
8. Super Bandit Park Jet
9. Super Bandit EDF Park Jet
10. Dirty Old Sock Parkflyer
11. X-31 EDF Park Jet
12. Fokker DR1 Parkflyer
13. F/A-22 Raptor Park Jet
14. Su-37 Super Flanker Park Jet
15. X-29 Park Jet
16. Polaris Seaplane Parkflyer

It might take me a few weeks to dig up...Continue Reading