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Posted by burkefj | Aug 25, 2018 @ 12:01 PM | 1,403 Views
Here's another fun kit I just released. It turned out that the biplane version turned out to be a bit more complicated to build and fly than I wanted but I still love this color scheme and styling, so I re-worked it.

The Iron Cross RC Rocket glider kit is based on a top secret WW1 Rocket powered mid wing monoplane interceptor. It has a graceful birdlike swept wing with scaloped trailing edges, a ww1 styled vertical stab, and an open cockpit. It comes with a plastic nose cone, 2.6″ white tubing for the body, Depron wing and 6mm depron tail surface. The wing is pre-grooved for the spar, control surfaces are pre-hinged, and the body tube is pre slotted for the vertical stab and partially slotted for the wing. Markings shown(not included) are available from Stickershock23.com 33″ long, 23″ wingspan, 10.75-11 oz rtf.(painted)

Dynasoar Rocketry Iron Cross RC Rocket Glider flight (1 min 54 sec)

Posted by burkefj | Aug 03, 2018 @ 10:29 AM | 1,540 Views
Here's a kit prototype I did themed on the Phil Kraft 1966 Das Ugly Stik, since it's a rocket glider with a tail mounted motor, I needed to have rear mounted wings for CG reasons, the first variation was a canard with kf airfoil which flew great but I built it without a kit in mind so my wingspan was too long and I had to slot the tubes for the wing/canard. A few customers really wanted a kit, so since I had to rebuild it to fit into a kit box anyway, reducing the span would make the glide shorter, so I decided to go with a staggered biplane design and get rid of the canard. This was my first biplane. With some planning the kit came out perfect with no nose weight needed. 11.5 oz, 23.5" wingspan, 32" length for my usual 24mm E-6 motors. I tried to keep the general tail and wing styling and the color scheme. On early testing I found I was getting wing flex without interwing struts which would make it hunt in pitch, I inserted two 3" wide struts and that fixed the problem. Painted with testors flat red and finished with cut vinyl decals from stickershock23.com.

My daughter had 10 minutes for a video in the morning, so I just did one flight, boost and landing were good, I did push over a bit early so it cost me about 10 or 15 seconds of glide time.

Dynasoar Rocketry Der RokitStik RC rocket gliding biplane (1 min 9 sec)

Posted by burkefj | Jun 25, 2018 @ 10:27 AM | 2,164 Views
I always thought the Centuri Skylab rocket from the early 70's was neat but never had one. Being left alone for the weekend my mindsim got the better of me and decided to do an RC rocket glider themed version.

I sat down and did some mass balancing Sims to convince myself weight and dimensions would work and the location if the wing and lateral stability, then looked in my parts drawer. I had some 2" tubing and 2.6". I picked up a bt20 nose cone pack and two white motor tubes for the tail thruster.

I thought styrofam coffee cups might work for the transition and nose and lo and behold the base of the cups were 2". I also found some small paper cups and they nested in the base of the foam cups to extend the nose. I doubled the foam cups for support and used a Depron disk in between them for stiffness and glued a coupler through the base for a shoulder. I doubled the cups for strength.

I'm using an 11" chord Depron wing with two carbon spars. Glide tests are done and it is looking good. I picked up some gold monokote trim for the wing/solar panels because I think it will look better than silver. It's 43" long and 27.5" span and 7.25 oz dry, rtf should be right around 12.5 oz , no nose weight was required. the RX and battery are mounted in the transition section.

I picked up some aluminum tube for rail button standoffs because the nose diameter is larger than the rear by 1/2". I put some skids on the bottom to make it level with the nose when landing.


Got the stickershock decals to finish off the skylab RC RG and got in some test flights today, was a bit more windy than I wanted and I had to keep the nose down into the headwind to keep it from balooning but overall not bad.

Skylab satellite themed RC Rocket glider (5 min 11 sec)

Posted by burkefj | Jun 22, 2018 @ 10:41 AM | 1,817 Views
One of my customers did this and it turned out pretty well. He sent some parts and here is my flight.

Dynasoar Rocketry Stratodart X Night Flight (1 min 36 sec)


The parts to do your own version and what I used are below:

Small gauge wire to make the jumpers to solder to the strips and connect + and – terminals from all the strips to each other. The strips can be connected from any set of pads since they are in parallel.

Red jst connector to fit the battery.

Lights

https://www.ebay.com/itm/LED-Strip-L…72.m2749.l2649

LED Strip Light SMD 3528 Flexible Tape 300led DC12V indoor outdoor lighting rope 5 meter length


Battery

https://hobbyking.com/en_us/turnigy-...pack-5pcs.html

Plan battery size, count your diides, current draw is 1 amp per 150 diodes(what I used), so with a 180mah battery using about 80 % of capacity to be safe would give 8 minutes, plenty long for pad wait, flight plus recovery.

I simply applied light strips to wing and fuse to make it easy to tell the difference between bottom and top and give light on the tail. I then used clear packing tape over the lights to protect them and hold them down.

On my stratodart I needed just a few grams of nose weight to rebalance. I left the 1s battery installed for receiver power and placed the small 3s battery for lights on the cg via a hatch. Battery weighs 19 grams so my starting weight was 11.6 oz without lights, with lights 12.2 oz, with 3s batt for night flight 12.9 oz. The stratodart has the most wing area and is able to carry the weight better.


For night flying, more is not necessarily better, you can blow out your night vision.


Here is my stratodart that I built using these parts.
Posted by burkefj | Jun 22, 2018 @ 10:28 AM | 1,787 Views
Here is an upscale of an old Estes kit. The original was a free flight glider and so to keep it stable on boost it swung the wing parallel to the fuse to move the CP rearward, and used a pop pod with extra fins that ejected at apogee to release the wing and put the glide CG back where it needed to be. I thought about doing one for a while, and did several simulations with wing folded and without.

With the wing folded and with a pop pod yielded about 75 more feet in altidude and about 1.5 ounce lighter glide weight, but at the cost of having to find the pod, I fly at a field that does not allow ejection of hot material from rocket gliders and the field is surrounded by tall crops.

With the wing folded but not using a pop pod, you also move the CP back, but then would need to put in some roll onto the elevons to counter assymetric drag, and add in the swing/release mechanism and you need to use a faster burning motor to be self stable, this yields about the same boost/glide weight, but with an optimized CG placement for less up trim required for glide and a bit more altitude.

With the wing fixed and steering on the way up yields a slightly reduced altitude but not as much as you think due to the slower burn motor/reduced speed/drag and a slightly shorter glide at the benefit of simplicity. That's the route I chose.

It's a 2.1" diameter, 28" wingspan, 11.4 ounce rtf model with a 10.2 ounce glide weight and about 13 ounce/sq foot wing loading with a .79sq foot wing, it doesn't glide that bad given the small wing area. Wing is 6mm depron reinforced with a .125 carbon spar, as is the horizontal stab and it uses just elevons for roll/pitch control.

2x upscale scissor wing transport RC Rocket glider flights (7 min 5 sec)

Posted by burkefj | Apr 23, 2018 @ 11:38 AM | 1,924 Views
I wanted to do something similar to the old Estes USS Atlantis, which was a long star trek themed rocket, I needed to keep weight in the rear at a minimum for a rocket glider so used one warp pod instead of two, and then did shapes as star-trekkie as I could, modified the nose to have the deflector dish inset.

35" long, 22" wingspan, 2.6" diameter, uses MPF for wings and depron for the vertical support with a carbon rod for strength. Weight is 12 oz rtf , Flights were perfect right off the drawing board with no trim changes,

NCC 2187 USS Forrestal RC Rocket glider Star Trek Inspired (1 min 21 sec)


USS Forrestal NCC 2187 Star Trek inspired RC Rocket Glider (1 min 17 sec)
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Posted by burkefj | Apr 21, 2018 @ 11:49 AM | 2,143 Views
Here are three projects I did in parallel, the UFO Invader was themed on the old Centuri rocket kit, the Fireball XL-5 was as close as I could get while still having a decent glider and the Maurader is a top intake cruise missile styled model. All are around 10.5-12.5 oz rtf, use 2.6" tubing, and MPF and are 20" wingspans and 32-33" long.

Fireball XL-5 RC Rocket glider (1 min 31 sec)


UFO Invader RC rocket glider flight (1 min 37 sec)
...Continue Reading
Posted by burkefj | Apr 13, 2018 @ 11:02 AM | 2,193 Views
I did a torture test yesterday, 10 flights on E-20PW rocket motors, these give about a 150mph boost speed, and unless the glider is perfectly trimmed it would be a disaster since there is no time to steer I recommend the E-6 longburn motors since you get the same altitude at a bit less per flight cost and you have plenty of time to steer on the way up.

Dynasoar Rocketry HABU rocket glider, 10 flights on E-20PW motors (8 min 22 sec)

Posted by burkefj | Mar 31, 2018 @ 11:07 PM | 2,280 Views
I decided to work up a new kit version of my SR-71 profile I did a few years ago, to use a split tube above and below the fuse/wing profile and do tubes for the nacelles but just do them on the top to save tail weight. The SR-71 has very little of the nacelle below the wing line in any case. I worked with a local rc club mate to do some 3-d printed intake cones that have flow through, and some top and bottom pieces for the cockpit and battery access in the front. I've done three versions, an SR-71 version, an A-12 single cockpit CIA version where I used sharpie pen to make the wing corrugations and panel lines before spraying silver, and a one off version of a YF-12 interceptor. On the YF-12 instead of splitting the tube I slotted it so that the normal nose cone would fit into the tube, because of this the chines are a bit shorter than scale.

The first two kit runs are sold. 39" long, 21.5" wingspan, 13.25 oz rtf using a 24mm E-6 rocket motor. This kit is about 15% larger than the old hobbylab kit, with 33% more wing area at about the same flight weight. Instructions so you can see how it went together at: http://dynasoarrocketry.com/?page_id=1424

Some videos, the last video was an early prototype without markings, but that I was able to do two carrier type arrestor hook landings with

Dynasoar Rocketry HABU/A-12 rocket glider kit flights (2 min 59 sec)


RC YF-12 Rocket glider flight (1 min 20 sec)
...Continue Reading
Posted by burkefj | Feb 17, 2018 @ 10:18 AM | 3,048 Views
I had a receiver and set of servos my family got me for christmas and I decided I wanted to do something as a rocket glider but also to call back to my first aileron plane, a Kraft Das Ugly Stik(mine was actually a hobby shack electric stik version).

I decided that since it was a rocket plane, and a semi futuristic design, I'd use canard but keep the tail and wing shape a-la ugly stik.

I used a doubled kf airfoil wing and non movable canard and elevon controls, 27" wingspan, 30.5" length, 2.6" diameter. Weight all up rtf is 11 oz.

I've gotten pretty good at doing indoor test glides to figure out max rearward CG, however in this case, even with a good canard cg calculator in hand, I was pretty tail heavy. The first flight I should have called it der Bodenjäger because it was hunting the ground, not the Sky......

It didn't help I was maidening in a 10 mph wind that was blowing downwind toward the launcher...Off the rail it pitched forward into the exhaust trail obscuring it, and I tried to react, but it wound up doing three nice 50 foot loops about 10' off the ground at the bottom with no control input, and settling into a perfect landing in the field. This was due in large part to my piloting prowess and the luck of the Irish....

Deciding that either I got some inadvertent canard incidence or tail heaviness I added .3 oz nose weight and gave it another try. This time it boosted much better, I moved the launcher and myself so I was down wind...Continue Reading
Posted by burkefj | Jan 21, 2018 @ 09:09 PM | 13,295 Views
Here is my RC rocket glider Klingon battlecruiser but flying with a pusher electric motor.

RC Klingon Battlecruiser Park Flyer (5 min 37 sec)

Posted by burkefj | Jan 04, 2018 @ 10:48 AM | 8,047 Views
My family got me an rx and servos for xmas and I hate to see them just sitting there, so when I got home from Seattle today, I sketched out another on my list, a flyable RC RG hybrid styled after the X-2 and Eddie Braun versions of the skycycle. It came out pretty light, 9.4 oz rtf with a 28.25" length, 2.6" diameter, 20" wingspan. Of course the wings are larger so it will fly, and the wing goes further forward so I'll have to scale down the name on the side to fit the remaining forward portion of the fuselage. I glued a small conical cone onto the PNC-80BB to create the crush cone on the model, then proceeded to cut and fit everything together. Did some indoor glide/CG verification and Finished the decals except for the lettering and gold stars. The color scheme is a mashup between the Evel Spirit and X-2, I'll put Evel Knievel on one side and Evel Spirit on the other. For the pilot, I only found a good left/right view of Evel's Wembley helmet so I shrunk a printout, glued it to some .03 styrene and covered it in clear packing tape. Got in three test flights, flies very nice, decent glide. Plans are at https://dynasoarrocketry.com/?page_id=938 if anyone is interested in reproducing it.

Evel Knievel/Eddie Braun Skycycle RC rocket glider flights (1 min 32 sec)

Posted by burkefj | Dec 26, 2017 @ 05:29 PM | 2,940 Views
Another scratch build I've been thinking about for a long time came to fruition over christmas. I got three very nice flights today on the Viper. Just need a fine tweak of down trim for boost, and a slight bit more up trim for glide than my initial settings. Given the small wing area and 11 oz glide weight, It flew much better than I was expecting, not a long glide, but very nice none-the-less and had plenty of pitch control down to flare on landing, very nice! Here are the three flights in order starting with the maiden flight.

I used model plan foam for the wings, lightweight 2.6" tubing and an angle cut plastic nose cone, 29" long, 23.5" wingspan and 12 oz rtf weight. After the video was taken I painted the oversized wing flat black to leave just the scale wing outline. I'm waiting to get the motor wraps to finish the motor detailing.

RC Battlestar Galactica Colonial Viper Rocket Glider (3 min 11 sec)


...Continue Reading
Posted by burkefj | Dec 19, 2017 @ 01:08 PM | 3,894 Views
Here's another that I've been mulling over in my head, converting the original rocket design into an RC rocket glider. This design was an Estes rocket themed in 1950's -ish flash gordon/Buck Rogers sci-fi style that was supposed to be a galactic pirate ship with a dragon theme. I used 2.6" lightweight tubing, 23.5" wingspan, 34" length, 11 oz rtf with rocket motor. It's got 235 sq inches of wing.

I built the cockpit box out of depron, as are the vertical stabs, and the wing is MPF with a single 1/8"spar with elevons. I played with openrocket to evaluate the lateral stability with the forward vertical stab and determined the placement to give me margin, then adjusted the wing shape and location to minimize nose weight needed. The cockpit is just an opened bottom box that I then sanded to contour using sandpaper over the body tube. Then I cut the notch in the forward vertical fin to fit the height of the box. Vertical stab goes through the rear of the wing and body and has a notch for the motor tube, and the motor tube has some locating strips on either side to center it laterally.

I like steampunk things, but not enough to build them myself, but this sort of has that feel. I left it white because the original markings tend to pop more than when on gray/silver. I hand cut the vinyl in red and then used black strips to make the dragon wing accents. For rivets, I make a 12" strip of milk jug plastic and make holes every 1/4"...Continue Reading
Posted by burkefj | Dec 08, 2017 @ 03:43 PM | 3,636 Views
I did the wing a flat plate, with just the motor pods mounted under the wing tips, and a modified front bridge/pod that is flat on the bottom to allow the rail guides/rail to clear the bottom. A 24mm motor tube will go from rear into the front bridge, and allow the wires to route through to the receiver/1s battery in the bridge with a small plate on the bottom to cover it up made of styrene. The 24mm tube will have a coupler the full length inside to reinforce it. This will be adaptable to a pusher parkjet if desired as well.

I've cut the pieces out, 29" long, 23.5" wingspan, around 11" at the root. I'll have an angled plate on top of the 24mm tube to give it the tapered look. I did add a single vertical stab for stability.

Here's what I'm using for the initial flight CG

http://wingcgcalc.bruder.com.br/en_U...d6=0&sweep6=0&...Continue Reading
Posted by burkefj | Dec 02, 2017 @ 12:32 PM | 3,520 Views
I wanted to do an orbital transport glider for a while, but buying a bunch of BT-80 tubing and cones for my kits finally pushed me over the edge. This is based on the late 60's Estes Orbital transport that had an SST style booster the recovered under parachute, with a biggyback glider that was freeflight. The glider had a low mounted wing that had a lot of dihedral for stability in free flight. The elevons were angle cut and were bent up for glide, and the drag was calculated in the stack to give a straight boost.

For a standalone glider that boosts vertically I didn't want a low mounted wing with dihedral, I prefer a mid mounted wing to get the servos on the bottom but up away from landing damage. Based on the dimensions I was able to just re-use the same wing I use for the Hypersonic III, Jayhawk, and Marauder kits so I had a known good CG location. It went together really quickly, and I hand cut the vinyl trim using what I had laying around. I used standard straight elevons and just mocked the angled wider tip elevons with trim vinyl and some sharpie markers to give it that "orbital transport" look. I added some leading edge color since it was a bit plain, and added a stripe on the bottom to remind me what direction I should be pointing

CG just needed .25 oz of nose weight, so AUW ready to fly with E-6 is 10.25 oz. 2.6" diameter, 32" long, 20" wingspan.

Maiden flight was perfect, hands off and glide was perfect as well, here is the maiden...

Maiden flight of Dynasoar Rocketry Orbital Shuttle rc rocket glider (1 min 46 sec)

Posted by burkefj | Nov 26, 2017 @ 10:45 AM | 2,988 Views
Here are two prototypes for kits I've just released. Both are based on BT-80 lightweight tubing from Balsa machining, and the estes PNC-80BB nose cone.

First is the Daedalus, inspired by the X-37B tiny shuttle used by the air force on clandestine missions. It uses 2.6" lightweight tubing and plastic nose cone with a MPF wing with single carbon spar and V tail made of 6mm depron. 34" long, 23" wingspan, 10.5 ounces ready to fly using a 24mm rocket motor.

The second is the Marauder cruise missile, based on the 1950's Mace and Matador missiles, I wanted a swept wing, but the MPF is a little too flexible for thin swept wings, so I made a delta with with elevons, and hid a portion of the wing using black trim vinyl, the advantage is you get a large wing and light wing loading with a swept wing look. 32" long, 20" wingspan, 10.5 ounces ready to fly.

Both of these use markings from stickershock23 that I designed with them.

Dynasoar Rocketry Marauder RC Rocket glider kit flight (1 min 27 sec)


Dynasoar Rocketry Daedalus RC Rocket glider kit flight (1 min 25 sec)
...Continue Reading
Posted by burkefj | Oct 04, 2017 @ 12:01 PM | 3,772 Views
Here is something I just finished, 3" diameter tube, 55" long, 37" wingspan, 26.5 oz rtf using a 32mm Aerotech G-12 long burn rocket motor. This is a 1.5x upscale of a smaller 2" version I did last month that flew well. The idea was to take the wing planform from the 2001 space odyssey shuttle and make a flyable design. I had already done a Pan Am logo on one of my other rocket gliders so I thought Trans World sounded better anyway....HS-65hb servos, a single 500mah 1s lipo and AR-400 receiver, all mounted at the CG, I adjusted wing location to avoid any need for balast. Here are some build pictures and a flight video. Wings are double thickness 6mm depron with lightweight hollow 3/16" carbon spars. Parts tracings/parts list and instructions are on my site at http://www.dynasoarrocketry.com My depron is some of the stuff with a curve in it, but by doing top and bottom wings I was able to reverse the curve and along with the spars it flatted out nicely. Same for the vertical stab. Look at the plans pulldown and select the orion plans.

Large Orion Starliner RC rocket glider flying on G-12 rocket motor (1 min 52 sec)
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Posted by burkefj | Sep 17, 2017 @ 07:35 PM | 4,139 Views
Had the final two flights today on my Titan II Dynasoar stack, both were perfect, here's the flight video from yesterday. Glider is 32" long and weighs 8 oz, full stack is 8" diameter by 9' tall and made out of 2mm and 6mm depron and weighs 80 ounces with glider ready to fly on an H motor, boosts to around 400' and then ejects the glider which is RC. Retiring it now while it is still in one piece after 2 years and 10 successful flights. Some flight photos courtesy of Gary Goncher.

Liftoff at about 1:05

Titan II Dynasoar Highpower rocket flight with rc glider (1 min 51 sec)

Posted by burkefj | Sep 04, 2017 @ 09:38 PM | 3,823 Views
I used up my final piece of 3" body tube with a cute little A-7 corsair II. 22" wingspan, 24" length, 9.75 oz rtf with a 24mm E-6 rocket motor. Painting and panel lines are on, nose is a hand carved laminated block of depron that plugs into a 1" long by 2" diameter body tube glued into the front of the body tube to allow me access to the receiver and flight battery. Stickershock Vinyl put the finishing touch.


A-7 Corsair II RC rocket boosted glider (3 min 13 sec)