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REV 2.4 - Wed Jul 20 07:12:20 2011

DynaStar
Rising Star

(Sold by Apogee Components)
 
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SPECS: 39" x 2.217" - 7 oz
ROCKSIM FILE: Right Click to Download
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: C11-3, D12-5, E9-4, E15-7, E30-7, F21-8

Rating
(Contributed - by Kevin Johnson - 09/13/04)

Rocket PicBrief:
Single stage LMR with a large clear payload bay.

Construction:
The bagged kit arrived from Apogee packed firmly in a box as part of an order of tubes. I got 2 extra canopies as part of a special when I ordered.

The parts include:

  • 1 2.217" body tube, 18" long
  • 1 2.217" clear plastic payload tube, 10" long
  • 1 coupler tube, 4" long
  • 1 fiberboard payload bulkhead disk
  • 1 5:1 ogive plastic nose cone, 11" long
  • 3 die cut balsa fins
  • 2 fiberboard centering rings
  • 1 24mm motor tube, 4" long
  • 1 engine block
  • 1 Kevlar® shock cord, 60" long
  • 1 1/4" launch lug
  • 1 32" diameter, octagon plastic parachute with heavy thread lines and tape reinforcement rings
  • 1 sheet of press on decals
  • There was also a nice instruction booklet with illustrations and a copy of the fin template.

The instructions (several pages on 8.5" x 11" sized paper) were very well written and illustrated to show all construction steps. Tools needed in construction included a hobby knife, a pencil, a ruler, masking tape, sandpaper, yellow glue, CA glue, and paint.

This kit is rated as a level 2 build and I'd have to agree. It was very quick to assemble following the directions, all parts were called out in an order that made sense. You are directed to notch the engine block to allow the Kevlar® shock cord to fit and you need to pay attention to where you mount the engine block depending on what size motors you plan on using. I had a little trouble at first getting the coupler to fit in the payload tube, but you want this connection to be nice and tight anyway. It just took a little bit of patience to get it to slide. The coupler and bulkhead attachment is very neat, using a section of Kevlar® glued along the inside of the coupler to act as an anchor and shock cord mount.

I built the rocket over the course of an evening using TiteBond II yellow glue.

Finishing:
Painting is easy...spray the fins and lower body tube one color, then spray the nose cone another. The peel and stick decals are nicely done with clearly marked cut lines. The one wrap around is the right size to make it around the tube with a 1/4" overlap. It would have been nice to have one more "DynaStar" for the 3rd fin, but I'll live.

Construction Rating: 5 out of 5

Dynastar Rising Star

Flight:
I had plans for this rocket to be used as a carrier for a night launch payload. I knew I'd have to have the oomph to carry a small strobe light and batteries so for the 1st flight I used a D12-3. I didn't use a spacer for the motor (having built the rocket for the longer E9 and F21 motors), so I just used a wrap of tape around the motor and the tube to secure it. The Rising Star got off the pad nice and straight but made some small oscillations as the motor burned out. Ejection was at apogee and the chute (protected by 5-6 sheets of Quest wadding) opened and filled very nicely. The bright yellow and black pattern was very visible. Touchdown was very soft on the short grass.

For the second flight of the day I used an F21-4 (not a recommended motor) because I wanted to get the strobe light higher and I was concerned that an E9 might not get the model going fast enough. Again I prepped with 5-6 sheets of wadding, wrapped the exposed motor and mount with tape for retention, and let it loose. The F21 got the model moving very quickly and the altitude was much higher than the D12 flight. The ejection charge fired and the parachute, payload and strobe light went on a long ride without the body tube. Every thing came down safely without damage. I had a nice long walk, probably about 1/2 mile, to where the payload came down. Thankfully the strobe was flashing to give me a beacon since it had started to get dark.

Recovery:
I had thought that maybe the ejection charge had burned the Kevlar®, but on finding the payload and examining the cord I found that the Kevlar® was still tied in a loop where it had been attached to the motor mount. It had broken the engine block, most likely caused by me picking too short of a delay.

Since it was already fully dark by the time I got back to the range and I didn't have anything to effectively perform a field repair (I will use epoxy and a section of body tube to make an Estes style shock cord mount on the inside of the airframe), I was unable to make a 3rd flight on an E9.

Flight Rating: 4 ½ out of 5

Summary:
This is a great mid power kit. It builds a lightweight rocket that can be flown on a wide range of D-F motors (especially when you add in 24mm reloads.. this rocket would kick on an F39!). The DynaStar line has some exciting looking models, maybe a cluster mount would be a good addition to this line.

Overall Rating: 5 out of 5

[Submit your Opinion]

GUEST's OPINION:
11/04 - "Just purchased the model and intend to modify the motor mount with an Estes "D" & "E" motor mount kit so it will be easier to use different engines. I will have to use the spacer rings of course that come with the Rising Star kit. (AT-56/18?) I am concerned about the shock cord mounting as the reviewer had the failure of this system and was going to use the old Estes "stick it to the sidewall" shock mounting. I would suspect that the hot ejection gases would wear out even the Kevlar® cord and lead to a melt-through eventually. I would surmise that using a larger thick ring similar to the engine block, glued somewhat farther up the Body Tube would be a more suitable long term solution if the model were to be reused and "not lost". Anyone know where I could find a thick ring like AR5055 that would fit the AT-56/10 body tube? Wouldn't mind hearing from others with experience on the engine mount/shock cord arrangement. Kurt Savegnago ksaves2@theramp.net" (A.K.S.)

[Enter Rocket Specific Tip]

SPECIFIC ROCKET TIP:
08/09 - "During the build on my Rising Star, I decided to make a few small modifications to make the use of the payload section easier. The first modification I made was to cut off the bottom of the shoulder of the nose cone. This opened up the entire inside of the nose cone to be used as payload space. This also made the nose cone more likely to come off, so I wrapped some masking tape around where the cone meets the payload tube. I also attached a swivel to the end of the shock cord so that the payload section could be detached for easier payload setup." (W.C. )

SPECIFIC ROCKET TIP:
04/06 - "Just an update here on this model. My original CATO'd on a SU E30 last October. I had extra fins and payload bays I bought from Apogee. I went ahead and rebuilt the model using a thicker walled tube from BMS. Launched the model yesterday on an F21-6. Flew great. A bit heavier but more robust." (A.K.S. )

SPECIFIC ROCKET TIP:
11/04 - "Needed something mid-powered to launch one of the new cool altimeters up. I don't like the engine block shock cord arrangement as I feel the Kevlar® will eventually burn through if one is lucky to not have a mishap for a long time. Instead of doing a shock cord a' la Estes, I went ahead and bought a "D" & "E" Estes Engine mount kit. I used an engine tube and the "E" engine hook from the Estes kit and the engine block and spacer rings from the Rising Star kit. In addition, I bought some 24 inch Eagle Claw wire fishing leaders from Wal-Mart. I think now I could have used 18 inches. I notched the engine block as shown in the instructions and test fitted one of the Eagle Claw wire leader snaps. I bent the wire snap to make it fit and test fit the engine block in the tube with an E9-4 motor. I put a tiny piece of wood with CA in the inside diameter of the notch to reinforce it. Now I wanted the ease of using an engine hook so 180 degrees from the wire leader, I made a little notch in the engine block to allow me to recess the hook into the block so the entire force of the motor is placed up against the block. Again I worked with getting the notching just right, test fitted everything before gluing. Now I have the ability to use any of the recommended motors with the "D" spacer in the Estes kit and the ease of using an engine hook. Tape will eventually tear up the engine tube in my opinion. Not done yet though. With a bit of planning one can use two AR5055 rings in the Estes kit to reinforce the paper spacer rings of the Rising Star kit. On the shock cord end of the tube you can slide down and glue one of the AR5055 rings followed by the paper ring of the Rising Star kit. Toward the nozzle end, you notch the paper ring of the Rising Star kit to accommodate the engine hook, slide it up and follow it with one of the AR5055 rings. In this way there is a bit more reinforcement of the motor mount when the ship is under power. On the eyelet of the wire leader, you can tie the Kevlar® shock cord on and adjust the length accordingly. Oh, I forgot to mention there is enough room in the engine tube to do an epoxy fillet to handle the thrust load on the block. Have painted the block with heat resistant paint. I think the wire leader will last longer than Kevlar®. Any thoughts on this? Best regards, Kurt Savegnago ksaves2@sbcglobal.net" (A.K.S. )

[Enter Flight Log]
Date Name Motor Ejection/
Altitude
Wind Notes
09-20-2009 William Carpenter AT RMS E28-7 Didn't Record 5-10 mph winds Event: Un-Named Launch
- First flight of my Rising Star. Good, fast boost to what looked like a good 1000' or more. Can't remember where it ejected. 24 'chute works much better than 36 behemoth it comes with. Still a long walk for recovery.
09-20-2009 William Carpenter AT RMS F24-7 Very Late
(1190' ft)
5-10 mph winds Flight PictureEvent: Un-Named Launch
- Second flight of my Rising Star. Used this flight to test my HiAlt 15k. Good, fast boost. Weathercocking resulted in very late ejection. It also robbed it of some altitude. 24 'chute a little big, but better than stock 'chtue.
10-24-2009 William Carpenter AT RMS E28-7 Just Past (1-2sec) 0-5 mph winds Event: Autumn Glare
- Fast boost to just under 1000'. Recovered 100 yards from the pad. Had my PerfectFlite HiAlt 15k on board, but I can't remember the altitude.
10-24-2009 William Carpenter AT RMS F24-7 Just Past (1-2sec)
(1107 ft)
0-5 mph winds Event: Autumn Glare
- This motor is perfect for this rocket. Good, fast boost with little spin. Ejected NC but not 'chute and rocket tumbled to a fast landing. Didn't even scratch the paint. Had my PerfectFlite HiAlt 15k on board.
10-25-2009 William Carpenter AT RMS F24-7 Just Past (1-2sec) Calm Event: Autumn Glare
- Almost no wind. Rocket flew perfectly straight. Ejection broke the swivel attaching the payload bay to the rest of the rocket. Payload bay landed without a scratch, but I forgot to arm my HiAlt 15k.
06-20-2009 Chuck Fauser Est SU E9-4 Apogee - NC Down Gusty - Nice slow liftoff. Needs a bigger motor.
06-19-2010 Chuck Fauser AT RMS F12-5 Didn't See Gusty Event: Summer Skies
- Night flight. Note to self, smokey motor not the best for night flying (no flame).
06-19-2010 Chuck Fauser AT RMS F39-9 Apogee - Perfect Gusty Event: Summer Skies
- Perfect flight. Had a camera in the payload bay but had it pointing in instead of out. Duh!
09-03-2010 Chuck Fauser AT RMS F39-6 Apogee - NC Down 5-10 mph winds Event: September Sage Xtreme
- On board gum camera videohttp://www.youtube.com/watch?v=ijEBgvLqF2c
02-23-2008 Timothy Gordish Est SU E9-4 Apogee - Perfect
(670 ft)
0-5 mph winds Event: Fiesta Island
- Great first flight. Flown with Apogee Altimeter payload.
02-23-2008 Timothy Gordish Est SU E9-4 Apogee - Perfect
(730 ft)
0-5 mph winds Event: Fiesta Island
- Later in the day, and a better altitude. The shock cord looks good so far. Rocket drifted almost off the island, and there was some damage to the parachute form ejection gasses. Need to add more recovery wadding next time.
09-11-2004 Kevin Johnson AT EconoJet F21-4 Very Early Calm Event: NARHAMS Night launch
- Carrying strobe for night launch. Deleay too short, broke the engine block that the shock cord was tied to.
09-11-2004 Kevin Johnson Est SU D12-3 Just Before Calm Event: NARHAMS Night launch
- Carrying strobe light for test flight. Some coning on boost, low altitude.
10-10-2004 Kevin Johnson Est SU E9-4 Apogee - Perfect 5-10 mph winds Event: SCST-4
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