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Posted by burkefj | Oct 04, 2017 @ 01:01 PM | 1,343 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)
...Continue Reading
Posted by burkefj | Sep 17, 2017 @ 08:35 PM | 1,782 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 @ 10:38 PM | 1,470 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)

Posted by burkefj | Aug 29, 2017 @ 03:25 PM | 1,805 Views
Here are a pair that I did in parallel, both using the 3" tubing I had and depron surfaces. I tried to style the wing and tail like a Mig 15 shape with a little stub T tail but use elevons for control for simplicity. The rocket glider came out at 10.75 oz rtf with a 24mm E-6 motor. The pusher came out at just over 14 oz rtf with a grayson microjet V-3 and apc 6x4 prop and venom 800mah 3s pack with grayson esc. The grayson esc is heavy and overkill at 1.125 oz and 30 amps but it was super cheap. I flew the rocket glider first to determine max rearward CG.

specs: 28" wingspan, 23" length, 3" diameter.

For the pusher version, I had to make a few modifications compared to the rocket glider. I had to move the motor mount from the center to the bottom of the tube so that the prop would clear the tail. I added a keel which along with skids helps give a bit of clearance for the motor/prop when landing, and gives a nice handhold for launching. Since the battery/electric motor are heavier than the rocket motor and 1s battery, I taped the wing to the top of the fuse before mounting it to allow me to place the required CG right where the natural balance point of the model was, and then cut the wing slot. This location meant the wing had to be about 1.5" further forward than on the rocket glider version. The actual model required 1/4 oz of tail weight for perfect trim.
I've since moved the receiver and esc back so that I don't need any tail...Continue Reading
Posted by burkefj | Aug 29, 2017 @ 03:04 PM | 1,846 Views
In my recent SPEV(spare parts eliminationv vehicle) mode, I have some more 3" psII tubes that are 21.5" long, I'm thinking of doing a mig 19 using one....wing won't be very big so may glide like a stone. A quick mass model I did playing with wing sweep to minimize required nose weight with components placed looks like a rtf weight of 10.5 oz and a wing area of 108 sq inches....
I'm going to use a fully movable elevator which means I'll have to mount the motor higher in the tube so that the pivot rod won't interfere with the motor mount. That should compensate for the assymetric drag of the vertical stab and maybe avoid any boost trim.

Did the wing drawing and frameup this morning, just about everything that could go wrong during building did, just a string of stupidity...Fortunately nothing that ruined the model, just my attitude.....

I played with the wing sweep and tail surfaces till I got something as large and swept as possible while still looking like a mig 19. I mid mounted the horiz stab for simplicity which meant I had to put the motor tube up above the carbon pivot rod. In fact this was helpful to offset the vertical stab drag by having the thrust line above the wing, at least that was my thought.

I inserted the motor mount backwards, realizing it just before the CA set, pulled it out and tried to clean up and redo it. Made the canopy from laminated foam and decided it was taking too long to shape by hand so used the belt sander and it grabbed...Continue Reading
Posted by burkefj | Aug 15, 2017 @ 02:03 PM | 2,490 Views
I was trying to find a use for some 3" pro series tubing I had that was pre-cut to 21.5" long, I decided I wanted to try to do something similar to the Mig 21i Analog, which was a testbed for the TU-144 supersonic aircraft wing. I was limited to how much wing I could use by both the length of the tube and the spare depron I had left in large enough pieces. I made a nose insert using a paper cone soaked in CA glued to a .03 styrene disk with a shoulder made from some strips of body tube reduced in diameter to fit the inside.

Wingspan is 20", single 3mm carbon spar wtih elevon controls. Back edge of the wing has a cutout for the motor tube, and the vertical fin goes through the tube and glues to the top of the motor tube to help align it in place. Exposed wing area is approx 1.29 sq foot, so about 7.75 oz/sq foot wing loading compared to 5.5-6 for my kits.

Rail buttons are offset to the side so they don't get damaged by landing and I put some skids on the bottom of the tube. Did some quick indoor glide tests which gave me a conservative starting point for launch. Came out at 10 oz rtf with E-6 motor and battery and 3/4 oz of nose weight.

I did six test flights this afternoon, nice straight boost, glide was not bad, not as good as my kit planes since the wing is about 3/4 of the area of my kits and the nose is fairly draggy. It was fairly windy but did some nice near vertical touchdowns in a headwind.

I went home and added a cockpit/spine tunnel with...Continue Reading
Posted by burkefj | Aug 04, 2017 @ 07:48 PM | 2,116 Views
I've been having a lot of fun flying these models, built with 6mm depron for surfaces, I built three with hand rolled double thickness 2mm depron tubes and one that uses a lightweight cardboard tube. The cardboard tube adds an extra 3/4 ounce but allowed a much straighter/rounder fuse. The tube is completely open except for the vertical fin tab, and the thrustline is about 1/2" above the top of the wing but parallel with the wing. The horzontal stab is parallel with the wing but just for looks.

The receiver and esc are just velcrod to the bottom inside of the tube near the front, the battery velcro's right at the front bottom of the inside of the tube. Air just flows straight through, wiring is taped down so it doesn't flop around. No nose weight was required.

I'm running these with grayson microjet V3 motors with 18 amp tbird esc with 800mah 3s eflite 35c batteries and apc 6x4e prop for 4 minutes of runtime. They fly great in high wind, will do high alpha slow flight, and are pretty neutral with a fairly axial roll. I re-worked the one I did in US markings to a pseudo german winter eastern front camo pattern, along with a Navy version in pax river test pilot school colors, and a huckebein camo version and a russian mig style version. Easy to hand launch with the keel and are just a lot of fun. I find myself flying these more and more. 21.5" long, 32" wingspan, 12.5-13.25 oz rtf with just two servo elevon control. They have a generic enough look to look good in a variety of schemes.

I used to do kits of these set up as rocket gliders, however I find myself now flying them just as pushers since they are so much fun.

Dynasoar rocketry Mach 2 kit flying with electric motor adapter (4 min 23 sec)


Dynasoar rocketry Mach 2 kit flying with electric motor adapter (4 min 28 sec)

Posted by burkefj | May 16, 2017 @ 11:48 AM | 5,093 Views
Quick update on Dynasoar rocketry, I've now sold out of my Wolverine and Interceptor III kits, but have plenty of stock of E-6 motors and the Hypersonic III and Stratodart kits. www.dynasoarrocketry.com
Posted by burkefj | Jan 29, 2017 @ 12:24 PM | 6,523 Views
I've been thinking about this one for a while, but didn't think I could get something flyable with the small wing the Pegasus launch vehicle has, and with the weights of components. However my recent learnings with my Mace I thought I could get something done under 11 oz with maybe a passable look and glide.

So, I scaled the wing up of course, took a crack at boost CG and moved things around in openrocket and my rc cg programs and decided on placement of components. The wing sits on sort of a platform, so I faked that with some little extensions in front and rear of the wing, with some reinforcing gussets below. Idea was to look like pegasus but be light. There seems to be a number of tail shapes and configurations in the photos I've seen, I chose one with a horizontal stab so it would match what I'm doing for the controls. Most of the photos show the fins at 120 degrees to each other, but the ones flown off of the B-52 I found were at 90 degrees to the vertical stab. Wing area is right at 1 sq foot.

Came in right at 10.75 oz, first test flight was a tiny bit pitchy on boost, but glide was much better than expected. I added 5 grams to the nose and it was very stable on boost, with a very decent glide, landing speed is faster than my others due simply to the wing loading but the drag is fairly low.

Working with Stickershock23 to do the rest of the markings.

38" long, 22" wingspan, BT-80 lightweight tubing from bms.

Here are three flights from this...Continue Reading
Posted by burkefj | Jan 23, 2017 @ 09:29 PM | 5,990 Views
I've wanted to do an RC RG similar to a Mace Missile. The Mace used spoilers, not ailerons for roll and a high V t-tail for pitch. I was worried about stiffness and tail weight for a true T-tail, so wound up doing a mashup between the Mace wings, with alcm full flying surfaces and a stub T-tail to give it a mace-like look. I used black vinyl to simulate the engine intake on the bottom, as well as to shadow the tail to give a bit of a boat tail look when viewed from the side. Later Mace missiles had a dog-house or a shroud over the top rear to stiffen the tail so it wasn't a true boat tail anyway. I also built up a version with an ALCM engine intake on the top with the vertical tail, and moved the wing back an inch to remove the need for any nose weight. I haven't finished the alcm version, but the Mace came out at just under 12 ounces and flies very nicely. Diameter is 2.6" and length 38", wingspan 28.5" for both. The alcm version should be closer to 11.25 oz rtf due to the wing/CG movement.


RC Mace Missile rocket glider flight (1 min 24 sec)

Posted by burkefj | Jan 10, 2017 @ 01:06 AM | 7,220 Views
I've wanted to try doing a full fuse RC rocket glider Mig 21 ever since I built a profile version a few years ago. I settled on using the same vertical stab/wing/tail of the profile and use a 2.6" bt-80 lightweight tubing I had. I found a used nose cone I had and chopped off the nose and trimmed about 3" off of that keeping just the tip. I then glued in a piece of 6mm depron to block the rear of the nose cone and glued the tip onto that to give the characteristic mig 21 look. A 28" long tube seemed about right for the body and I decided on a sort 12mm sandwich profile for the canopy and spine to reduce drag instead of a full turtledeck.

I used a rocketry program called openrocket to build a mass model putting in the weights of the components including electronics, tubing, depron etc, with an estimate of my required boost CG and what nose weight might be needed. It looked like one ounce of nose weight would do the trick and keep me at 12 oz rtf using a 24mm E-6 rocket motor which will boost that weight to around 500'. Wing area at just over 1 sq foot is about half of my other rc rocket gliders so glide will be steeper, but not as steep as my bomarc which weighs closer to 14 ounces rtf with a similar wing and much more draggy design.

I decided to use the tab for the vertical stab that goes through the body tube to hold the motor mount in place, and to use full flying tail surfaces since that was very easy to do by putting a simple aluminum pivot tube...Continue Reading
Posted by burkefj | Dec 29, 2016 @ 11:20 AM | 6,532 Views
Had very nice weather on Christmas morning and so took out some of my newest planes for some flights, really a lot of fun.

Christmas Rocketplane flights (8 min 8 sec)

Posted by burkefj | Dec 19, 2016 @ 04:10 PM | 6,631 Views
The Jayhawk is a neat target drone, and one of my favorite rocket kits when I was a kid. It's rated at mach 4. The wing is pretty small, a 3.5' wingspan for a 14' long rocket, since at Mach 4 you don't need much.

I found some spare 2.6" lightweight tubing and nose cone I had and decided to make a Jayhawk like RC rocket glider. The 2.6" tubing is very light and the tubing+cone comes in at 4.25oz total. I combined that with one of my Hypersonic wing sets from the kits I make and played around with a stability program to ensure that my flight CG and the lateral stability with the wingtips would work out ok.

the wing is larger than scale to support flight, and I had to chop the lower part of the wingtips down a bit so that they wouldn't drag on the ground. I built a conduit section from laminated depron, mounted my rail guides and skids on that which helped raise it up off the ground some more.

Will use elevon control, 24mm E-6 long burn rocket motors.

painted rtf with motor is 11.25 oz

20" wingspan, 36" long, 2.6" diameter.
Posted by burkefj | Dec 08, 2016 @ 10:28 AM | 6,700 Views
Hi all, I've just completed test flights and instructions for the latest kit and probably the last new one I'll be able to produce for a while until I can find a good alternate foam replacement. I have enough parts for about 10-12 of these kits.

Instructions at: http://www.dynasoarrocketry.com/wolv...tructions.html

The Wolverine is based loosely on the old Estes Wolverine rocket, this has a heavy duty 3" tube body, through the body wing and tail and elevon control. 11 oz rtf for the venerable 24mm E-6RC rocket motor. Comes with tube already slotted, wing and tail spars installed and control surfaces hinged. 25" long, 32" wingspan. Stickershock did a great set of decals for me, I added just the tail and wingtip accents and the little black wing walk portions myself.

This design is similar to my Mach 2 kit, but by using a smaller tube, mid mounting the wing and removing the T-tail I was able to make the construction simpler and stronger and it will now fit it into my regular shipping boxes.

Construction is simple, unfold and glue the wing, install the small spar, insert the wing and glue in place. Glue the vertical stab in place, insert and glue in the pre-assembled motor mount and install the electronics and balance. As normal, rail buttons are included as standard unless you want a launch lug. Rail buttons are mounted slightly to the side so that they do not get caught on anything when belly landing.

Hope you all have a great holiday, it's been...Continue Reading
Posted by burkefj | Nov 22, 2016 @ 11:28 AM | 6,751 Views
I've finished and released my latest rc rocket glider kit, this is the simplest I can make construction and lightest weight given the components and still keeping a wing loading of around 6 oz/sq foot. The wings and tail are styled after the old Estes Dart but with a mid mounted wing. Maiden flights went really well with just about 3-4 clicks of down trim for boost and no added nose/tail weight needed. 11.25oz rtf with 23" wingspan and 38" length, comes with plastic nose cone with canopy/panel lines, pre-cut wing with spar slot cut and elevons installed, body tube slotted for the tail. Takes about 1.5 hours to assemble and install radio equipment.

Flight Video:

Dynasoar Rocketry StratoDart RC rocket glider Kit description and flight (2 min 16 sec)


I've done a complete built video along with a radio installation video:

Dynasoar Rocketry StratoDart RC rocket glider kit assembly (24 min 39 sec)
...Continue Reading
Posted by burkefj | Sep 12, 2016 @ 11:23 AM | 8,001 Views
I've been working on/thinking about this one for a while, I found a spare cosmic interceptor kit in my box that wasn't allocated to kits, and put this together. Based on an F-16, of course with a longer nose due to the interceptor cone. I went with a mid mounted wing and full flying tail only. I had to cut off one of the speed brake tabs on one side so that I could slide the wing in the slot, then glued it back in place, then slide the stabilators on and glued on the capture rings to hold them in place. Did some glide tests in the house before equipment install and took a swag at the boost CG. RTF weight came out right at 11.25 ounces before finishing. Did two test flights today in about 10mph winds, handled it really well, and I was able to move the CG back slightly.

I started using some vinyl to do the markings and so far she is coming out pretty nicely. I had to modify the thunderbird scheme slightly since I'm cutting this freehand and the nose being long, I did some nose and mid stripes so the middle wouldn't seem too plain. RTF now she is 11.75 oz. Just waiting for some small stars/bars and lettering.

F-16 Thunderbird RC Rocket Glider (4 min 9 sec)
...Continue Reading
Posted by burkefj | Aug 28, 2016 @ 03:27 PM | 8,004 Views
Here is another based on the Cosmic Interceptor but this time styled like a swept wing F-14 tomcat, in pseudo VF-111 Sundowner scheme but with early white control surfaces which helped set off the wing sweep/tail surface detail...

F-14 Tomcat RC Rocket Glider (5 min 46 sec)

Posted by burkefj | Aug 22, 2016 @ 07:01 PM | 7,867 Views
Thought it would be interesting to document all of the different RC Rocket gliders I've made from the Estes Cosmic Intercpetor rocket kit. It's a great platform at a closeout price, the nose cone is neat with molded in panel lines etc. All are 38-40" long, 20-26" wingspans, 11-12.5 oz rtf.

Here you go:

Three versions of Interceptors, wing with elevon controls, cranked delta elevon style, full flying tail style, F-104, F-105, A-12/SR-71, F-4 phantom wing/tail style, F-101, Delta Dart, Valkyrie, Avro Arrow, SST, Pegasus(fantasy), another Interceptor version with lighter weight, X-15-3 Delta Configuration, Arc-Light(fantasy), X-15-3 Delta mid mounted wing, F-14 tomcat....Continue Reading
Posted by burkefj | Aug 22, 2016 @ 04:12 PM | 7,781 Views
Here is another using the F-104 starfighter as the goal and using the Estes Cosmic Interceptor parts...flew really well, decided on a German Navy scheme....

U cut the tail of the body tube to give the right lines and to allow me to inset the rocket motor to help CG. I also moved the wing placement back an inch.

To keep the back end light and keep it simple I just did a light direct servo to the tail surface and routed the servo wire on the side, taped and painted over, instead of trying to do some internal linkage idea...

38" long, 2" diameter, 11.5 ounces ready to fly.

RC F-104 Starfighter rocket glider (5 min 13 sec)
...Continue Reading
Posted by burkefj | Aug 14, 2016 @ 02:37 PM | 7,688 Views
Here is another based on the Estes Cosmic Interceptor parts made into something resembling an F-105 thunderchief. I cut the rear of the body tube so mimick the petals of the speed brakes partly open. Full flying tail surfaces only for roll/pitch.

Frank

F-105 Thunderchief Rocket Glider flights (3 min 55 sec)