Information Page: Applies to all kits, each kit has it’s own specific build instructions but read this page first. Please note you must be comfortable flying an aileron controlled fixed wing RC aircraft that flies around 60-80 mph before you attempt fly one of these kits.
Items needed for assembly:
Foam safe CA+ with accelerator for most glue joints. I use Bob Smith gold with the black cap **other CA’s may melt the foam, test on scrap if you aren’t sure. DO NOT use CA debonder on the foam without testing on scrap.
Items needed for flight: (these are what I use and recommend, there are always cheaper components but I have not tried them, I use what works for me, saving $20 on servos on a model with $150-$200 invested is not worth it to me)
Depending on the model you will also need 2 servo extensions from 12″ to 24″ length to mount the receiver in the nose cone or forward end of the body tube which helps CG and also makes it easy to attach the battery and access the receiver if needed. Try to avoid heavy weight wiring if possible. These extensions can be found online, at tower or at most hobby shops. The length depends on the model and the length of your servo wire.
These are the best I’ve found and are actually from hobbyking, they are very inexpensive, lightweight and have clips that prevent the wire from slipping out of the servo plug,
You may notice some of the foam has a bit of waviness or some small dents/dings, on the surface, that’s just the way they make it, I try to put any blemishes on the bottom of the wing so it isn’t noticable. I’ve also chosen the best surface to be UP, and put the spar on the bottom of the wings, if you see the black spar that’s the bottom of the wing.
I have personally used model master and testors enamel small rattle can flat black, flat red, olive drab, and gray on depron foam. If you are masking over painted foam, the tape may pull up the paint so you can’t use a masking tape that is too sticky, I use blue masking tape but it isn’t perfect, so I try to avoid color schemes that require masking painted foam. You need to be careful not to spray too close to the foam or the spray solvents can melt the foam. Use many light coats, not one heavy one. I don’t recommend any other brand of paint, and it’s always good to test on spare foam first. One customer tested Rustoleum direct to plastic paint on some scrap and it seemed to be ok, but then it damaged the top surface of the wing, an online search showed that you needed to keep at least 2′ away when spraying and it was not specifically listed as ok for foam in any case, so again, I’d stick with the model master/testors enamels.
I’ve used trim monokote and self adhesive vinyl for accents on my personal models. Callie graphics is a good source of custom aircraft markings. I do have a third party mfg that makes excellent cut vinyl markings for a good price, the link is included in the kit directions page for your kit. It comes on transfer paper, you need to press and carefully roll the transfer paper back, not pull straight up or it will pull the marking and/or paint off. Once applied, use a hot hair dryer to heat and press the markings down to set and secure them. Do NOT apply markings over the blenderm tape, it will not stick and will pull paint off if painted.
It’s recommened using the aerotech single use or reloadable 24mm E-6 motor for first flights since it gives the slowest boost and allows time to trim the model if needed. The reloadables are easy to use, just grease the inside of the case, o-ring, and forward end of the propellent and outside of the liner(I use synthetic SuperLube) , insert propellent, insert nozzle, insert o-ring, screw shut. Retail Cost per flight for the reloads is as good or better than Estes Black powder E motors and they have approx 40% more total impulse. I use a baby/handy wipe and paper towel to clean inside the case every three flights or so or after I’m done flying. Here’s a video showing how to reload the 24mm aerotech motor. Single use are more expensive but you don’t need the special RC casing.
See the Ordering Tab above for ordering.
Installing igniters into your E-6 rocket motors:
The igniters for these motors are small and it is easy to damage the tip if you aren’t careful. I don’t carry spares and Aerotech charges a lot for them. You need to secure the igniter in place, touching the propellent and keeping it from blowing out on initial firing before it truly lights the propellent. You also need to make sure the leads don’t pull the igniter out and that you don’t block the small nozzle but that the igniter can pull out when the model lifts off. These motors don’t have a large thrust spike so if you use too much tape it can actually yank the model instead of releasing it. I simply insert the igniter carefully till it just touches the bottom of the propellent slot, and then fold the igniter back over the nozzle and secure it with a 1/8″ wide strip of masking tape and make one and a half wraps around the nozzle. This holds it securely but makes sure the igniter can pull out after liftoff.
These kits are designed for the E-6 because it has a gentle burn rate and keeps the speeds low, around 120fps or less. This has two benefits, you reduce chance of flutter in the foam wing from overspeed and it gives you more time to adjust to wind and trim issues especially on the first few flights.
- I would never trust one of the estes 24mm E motors as I’ve just seen too many fail and Estes won’t replace your RC model:)
- An epoxy plugged(1/8″ thick)D-12-0 motor in my tests were ok. The initial thrust is higher, but the burn time is lower, however the D motor only gets you 200-250′ altitude so glides are short. The epoxy is needed for the D-12-0 to prevent the burnthrough from damaging the wing foam as the motor tube is exposed at the front, and if you let the motor eject you will be too nose heavy for glide.
- Epoxy plugging bp motors is not manufacturer approved and so not NAR legal, and modifying bp motors makes them research, and tripoli does not allow bp research motors, AMA approved flying sites follow NAR rules so would not be kosher either, so I can’t really formally recommend that in general, but if you are flying at your own site you can do whatever you want to and people do it all the time.
- I would definitely not recommend E-11/E-12/F-12/E-18/E-20/E-15 P-W motors because the speeds expected with those motors are twice what you get with the E-6 and you risk flutter and the boost is so fast it’s very hard to control. I’ve designed these to be as light as possible with the available components to maximize performance on the E-6. If I designed them stiffer, they would be heavier and performance would be lower. Here are some sim numbers for the Stratodart kit at 11.5 oz rtf, you can see that E motors sim to very similar altitudes, are approx the same cost per flight, but the E-6 keeps the speed nice and easy and easy to control as well: To give some perspective to these numbers, 126fps maps to 85mph which is typical edf jet speeds, 248fps maps to 170 miles per hour which is a good rocket speed but very high for an rc airplane without a lot of reinforcement. Note that the new E-15PW motors are actually rebranded E-20PW motors with a much higher peak thrust. You can also see the D12 and D11 don’t get very high.
Here is what happens when you use a 24mm Estes E-9 or E-12 motor and it fails…This particular model was fixable with replacement of the melted foam area and has flown again but it will never look as good as it originally did:)
Notes on radio equipment and flight battery(many radios will work, this is what I use and know will work)
Transmitter: I use a DX8gen2 radio, but the new DX6 has most of the same features, 250 model memory, mixing, flap switch for glide trim…pretty inexpensive. These models require mixing of the aileron/elevator channels to provide control. Simple 2-5 channel radios usually do not provide this feature. It may be possible to purchase an electronic mixing module to add to the model. You also need to be able to put in trim for glide, you can do this manually with the trim tab but you will need to set and re-set this each flight. The 6 channel radios and higher usually include both the mixing feature and the ability to program up trim on the flap switch which allows easy setting/resetting of the trim position on a switch.
Receivers. I fly spektrum and use the full range micro AR400 receiver.
Most receivers can run with 3.5V or better input so a larger capacity 1S battery(500mah) should work fine. Servos will run a tad slower. The 1S batttery will need a plug or adapter that is compatible with your RX. If you need more nose weight for balance and you don’t want to add lead, you can just use a larger flight battery instead.
I use a hitec charger which is overkill for a 1s battery but I use it for charging my transmitter and 3s batteries as well.
This is a nice tiny charger that uses a usb connection: USB Charger You Just need something with a jst connector, will charge a 1s battery and have a charge rate about 500ma or so. I fly a single battery and am doing 10-12 flights on one battery with only about 150mah out of 500 being used…
Radio Install Video:(for the Stratodart but the radio install is nearly identical in all of my kits)
Launch Pad: For flying at my local RC field I made a very simple pad. Since I boost straight up and then can steer into the wind if needed I didn’t need any angle adjustment. I simply used 2″ sch. 40 black abs pipe available from the local home depot, with legs about 2′ long with end caps on one end and put some threaded ends on the other. I bought a “+” shaped intersection and put threaded couplers into each inlet of the intersection. That way I can screw the legs in or take them out for transport. To mount the rail I bought a 8″ by 1/2″ bolt. I drilled through the intersection in the middle for the bolt to pass all the way through and secured it with a nut and washers. I used two hose clamps to clamp the rail to the bolt in two places. The bolt naturally tends nest in the rail slot and keep it straight. Originally I cut a 12″ long piece of black abs pipe and slide that over the rail and it stops on the hose clamps and acts as a standoff to keep the model up off the ground. Now I just put another 1″ hose clamp on the rail and snugged it up tight, the model will stop against the screw portion of the hose clamp. You can add a blast deflector if you think you need it, the E-6 motors don’t make a lot of flame so I don’t use one, I keep the model about 12″ from the base when I launch.
Notes on Flying
It is recommended you use a 6′ rail to launch your model to avoid any flex/whip which can happen with a rod. If you do use a rod, make sure it is at least a 6′ 1/4″ rod to give sufficient airspeed on launch, you’ll need to add a 1/4″ launch lug to the model centered on the CG location at least 5″ long. The rail buttons are designed to be used with standard 1010 rail that can be purchased online and from the 80/20 corporation on ebay/amazon.
*While these models are very easy to fly and boost, they are not intended for a novice flyer. Initial flights may require minor trimming to be done both for boost and for glide. It is best to use one of the low thrust long burn motors for these initial trim flights to give time to react to any trim adjustments needed. It is best to have an experienced R/C pilot do the initial flights/trim and fly with a buddy box with you for subsequent flights until you are comfortable. Even though they boost with little to no input once trimmed, do not assume that you can leave your radio off and/or not touch the controls. It is hard to judge winds aloft and you must be ready to keep the model boosting straight if needed.
Turn on your transmitter and then receiver. Install a loaded motor. Ensure your balance is still correct and all control surfaces are in the correct position for boost and are moving the right direction.
Check your glide trim setting is correct if you have that on a switch, but make sure you switch to boost setting for launch!
Be sure to use a standoff with at least 12” from the blast deflector or pad to avoid any hot particles from bouncing back and melting the foam.
Do not put the standoff directly below the nozzle for the same reason.
Once the model boosts, react quickly in either pitch or roll to keep the model pointed straight up or slightly away from you so you can see it. As the model reaches apogee, push the model over to level flight to keep flight speed and then switch in the trim setting. If you let the model get away from you it can get very small quickly and be very hard to determine orientation. Sometimes it helps to turn yourself in the direction of the flight of the model to avoid getting confused. For the first flight you may have some roll or pitch trim that needs to be set for boost and/or glide depending on how straight you built your model. Adjust as needed.
Once gliding, circle your landing spot while not banking too sharply which causes the model to lose altitude. Do not let the model get too slow till you have a feel for how it flies. Set up for landing into the wind. If you find you are slightly high, it is better to make gradual S turns back and forth keeping the model pointed into the wind slightly to lose altitude and avoid a downwind turn. When about 20 feet off the ground start to level the model and let it settle, if it gets too slow, push the nose forward slightly. About two feet off the ground pull back slightly to flare and soften the landing. If you have a model with fully movable surfaces it is a good idea when landing on grass to relax the up elevator just before touchdown to prevent the tips of the controls from catching on the grass/dirt and damaging them. It may take some time to judge your landing spot so fly in an large open space till you are confident in your landings. If you keep the model overhead you can always adjust your altitude with S turns. If you let the model get very far away it can be hard to judge orientation. If there is a headwind, launch up wind and make sure not to go too far downwind or you won’t be able to make it back to the launch site.
Be sure to check the controls, battery attachment, wires, launch lug or buttons before each new flight to be sure nothing loosened.
If you have any slight damage you can use the spare depron to repair it. Simply cut the damaged piece out, cut a new piece, insert and glue in place. You can use the blenderm tape to give extra strength if needed. If the depron gets cracked, and it is a clean break, you can re-glue and tape as well.
Can I learn to fly RC using a rocket glider? Short answer is not really, unfortunately. Even though these are relatively easy to fly, they don’t have an on off switch and you need to do some trimming during the first few flights. It is nearly impossible for a new flyer to keep his left/right straight while trying to trim a model going 60 mph straight up in a few seconds. There are a few micro rocket gliders available that can boost hands off and have only yaw/pitch control, but flight times are very short and it’s hard to gain the skills you need in that short of a time. If you have an rc club near you, you could have someone experienced do the first few flights for you to get it trimmed, but you still should fly with assistance/a buddy cord till you are confident. There is simply no point in destroying a nice model learning how to fly. If you have no help or clubs nearby I recommend the eflite radian or radian umx. The latter is a smaller lighter/cheaper version, it can’t be flown in much wind though due to the light weight. These are good models to learn to fly with and when you have confidence in your abilities, you can move to rocket gliders. If you get the spektrum radio suggested in my information page it will be usable for these models and rocket gliders.
When flying, practice chopping the throttle and doing deadstick landings, judging your decent rate and airspeed beause that’s what you will have to do when flying the rocket gliders. You should still have someone experienced help you set up and do the first trim flights if you aren’t comforable. Simulators are also a good way to get experience. I’ve found that it really helps when people are trying to learn. When I was doing instructing, people that would come back for lessons each week that were doing simulator practice often had improved their flying skills, while others had to re-gain a bit each time they came back. One thing I feel though, is that simulators, as good as they are, aren’t great at helping landings, since it is very difficult on a simulator to judge distance and perspective/altitude, but they are great tools.
**I get queries about shipping to Canada and overseas, however due to the size of the kit boxes the price is usually cost prohibitive and people aren’t interested in paying what the postal service charges. For this reason Non US paypal accounts are not accepted by default. If you are outside the US and are interested in ordering a kit please use the contact form with your mailing address and I can get you a quote and enable payment. I can’t mail motors internationally.
RC rocket gliders should be flown responsibly as you cannot turn off the motor after ignition, here is the NAR recommended safety code . AMA safety code only specifies Rocket motors, up to a G-series size, may be used for propulsion, as long as they use solid propellants and remain attached to your model during the flight. Launching a rocket or any other missile from a model aircraft is prohibited Use the appropriate guidelines depending on whether you are at an AMA site of NAR supported launch.
Given the latest news on the FAA ruling for model aircraft I’m sure there is concern about these boosting over 400′. Direct communication between the FAA and NAR board noted that rocket gliders, whether rc or not are considered rockets and are not what the FAA is concerned about, there should be no issue flying them especially at launches already with a waiver in place for rocketry.