K-160
You’ll need the items to complete this kit
Specifications
Length: 78.5”
Diameter 4.0”
Weight: 76oz
Recovery: 48” Nylon Chute
Motor Mount: 54mm苦恼的意思
Fins: 6 - 1/4” Plywood
CG: 57” from no tip
(1) No Cone
(1) Pre-slotted main body tube (31”)
(1) Payload ction body tube (31”)
(2) Centering rings
(1) Couplerguts
(1) Bulkhead
(1) Motor tube
(6) lar-cut fins
(2) Eyebolt, nut and washer
(1) Nylon shock cord
(2) Rail buttons, (2) screws, (1) weld nut
上衣英语
(1) 12x12 Chute Protector (optional)
(1) 48” Nylon chute (optional)
Parts List
FRENZY
5 Minute Epoxy
120/220 Sandpaper
Filler and Paint
Pencil
Zap or CA
Super Glue
Lead Shot
for Balance
Motor Retainer
®898666001604
Step 1 - Sand the glassine coating off of the motor tube.
励志演讲Epoxy will not stick very well to the glassine and roughing the tube will help the epoxy stick.
Step 2 - Test fit the centering rings over the motor mount tube and sand if necessary. The ring should slide snug over the motor tube without deforming it. Also test fit the centering rings in the body tube and sand if necessary.
Step 3 - One of the rings will have a hole for an eyebolt to attach the shock cord - this will be the forward ring. Spread some epoxy on the outside of one end of the motor tube and -Step 4 - After the forward ring is dry, spread some epoxy on the other side of the motor tube and slide the aft ring until there is 1/2” expod on the aft end of the motor tube. VERY IMPORTANT: make sure there is not any epoxy on the mo-Step 7 - Wrap the shock chord into a small bundle and stuff it inside the motor tube for this next step. Test fit the motor tube asmbly into the aft end (end clost to the slots) of th
e body tube to ensure a snug fit. Sand the centering rings if neces -sary.
Step 8 - When you are satisfied with the fit, spread some
epoxy on the inside of the body tube about 5” from the aft end and slide the forward centering ring of the motor asmbly into the body tube. Make sure you have the motor as-mbly facing the right way - the centering ring with the eyebolt should slide in first!
Keep going by spreading some more epoxy on the inside of the body tube near the aft edge before slea
liding the aft centering ring into the body tube. Continue sliding the asmbly inside the body tube until the aft centering ring is all the way in body tube with the aft end of the motor tube lining up with the aft end of the body tube. It’s a good idea to test fit a fin in each slot here before the epoxy ts. Hold the body tube with the motor tube asmbly down until the epoxy ts. Make sure the weight of the motor asmbly doesn’t cau it to slide out of alignment.
sure the eyebolt is aligned so that it will not interfere with the body tube when the motor asmbly is inrted into the body Step 9 - Using a door jam or small ction of angle stock, pen -baronet
Step 20 - Apply some epoxy to the inside of the coupler and push the bulkhead in so there is about a 1/8” to ¼” of cou -pler expod. After the epoxy has t, apply a fillet of epoxy Step 10 - Test fit each
of the fins into the pre cut fin slots. The fin should at firmly against the motor tube - sand each fin if necessary.
When you are satisfied with the fit, apply some epoxy to the end of the fin tang that will contact the motor tube as well as any fin root that will contact the body tube. Also, spread a thin layer of epoxy on each side of the fin tang. Slide the fin into place and check the alignment. Continue rechecking the fin alignment until you are sure the epoxy has t. Clean any excess epoxy from around the fin joint. Repeat for the Step 21 - Next mark the coupler 3” from the forward edge. Apply some epoxy to the inside of the forward body tube c -tion and slide the coupler up to the mark. There should be 5” of coupler expod. Make sure the coupler is straight and Step 16 - Inrt the weld nut from the inside of the body tube through the previously drilled hole. You can hold the nut in place with a little CA if you like (be careful not to get any of the CA glue inside the threads. Place the rail button over the weld nut and cure with the short 6-32 screw. It is a good idea to Step 12 - It is also a good idea to CA the sharp tips of the fins to keep them from splintering on hard landings.
bulky
Step 13 - Drill a 5/64” hole on the rail button line for the aft rail buttons ensuring the hole goes into the aft centering ring.Step 14 - Apply a small amount of epoxy in the hole and at -tach the rail button using the supplied #6 wood screw. Make sure the screw is loo enough for the rail button to spin freely - this ensures the button is not compresd to the point it will hang on the rail guide.
Step 15 - Drill a 3/16” hole on the rail button line for the forward rail button. The forward hole should be 6” from the forward end of the main body tube. IMPORTANT: Make sure there is at least 6” from the forward end of the body tube or the rail button will interfere with the coupler.
Flying Your Model
IMPORTANT: always u positive motor reten-tion to cure the motor. Failure to u motor retention will cau the motor to be ejected in-stead of the parachute making for a dangerous ballistic reentry.
IMPORTANT: always remember to check your balance point and ensure your CG is forward of the specified CG point.opp
IMPORTANT: Always follow the NAR safety code and remember that rockets are not toys and can be dangerous if not prepared and ud properly. If you are a beginner, it is a good idea to fly with a club or other group of experienced rocketeers until you have gained some experi-ence.
IMPORTANT: In no event shall Madcow Rocket-ry be liable for any direct, indirect, punitive, in -cidental, special conquential damages what -soever arising out of or connected with the u or misu of it’s products. The buyer assumes all risk and liability resulting from ANY u of any and all products sold by Madcow Rocketry. Your purcha and u of any Madcow Rock-etry product constitutes your agreement to and acceptance of the terms. If you do not agree to the terms and conditions, you must return the unud product in resalable condition for a refund or credit.
IMPORTANT: Plea contact us via phone or email if you have any questions about con -structing or flying your model.
王羽尧
24338 El Toro Rd #E-134Laguna Woods, CA 92637
949.547.8847
**************************©2011 MadCow Rocketry™
Balancing Your Model
Step 22 - Pack the chute and asmble the rocket. When packing your chute, wrap the chute protector around the chute with the opening in the chute protector facing forward. Always make sure your chute is well protected as the hot ejection mo -
tor gass will melt the nylon chute.
Step 23 - Inrt the largest motor that you intend to fly (or
simulate the weight with an appropriate substitute) and ensure that the CG (where the rocket balances front to back) is at or in front of the point defined in the specifications on the first page. The CG should be measured from the tip of the no
cone.
Step 24 - If the CG is behind the specified point, add weight inside the no cone by pouring lead shot into the no cone and adding some epoxy. Hold the no cone with the tip down so the weight will be as far forward as possible. IMPORTANT: Screw in veral screws through the plastic no cone into the lead to hold it in place. Grind or cut off the screw head before filling and applying the no cone finish. The epoxy will not stick to the inside of the no cone and if you do not anchor with screws, the liftoff force will cau the weight to become dislodged causing an unstable model. When you are satisfied with the balance of your model, attach the no cone to the payload
一是一 二是二
ction.
IMPORTANT: Proper CG is critical to the stability of this model. This model will require some ballast
in the no - the amount will depend on how you build and the size motor you u to fly. Do not fly without balancing this model properly as a dangerous un-stable flight will result.
Step 29 - Your model is now ready to paint.At this point your model is ready to fly.
Now go have some fun!
Step 27 - Drill a small 1/8” hold in the chute compartment to allow venting. Make sure you do this without the chute in the
chute compartment.
Step 28 - At this point install your positive motor retention device. The kit does not include a motor retention device and
this will need to be purchad parately.Final Asmbly
Step 25 - Using the same knot you ud in step 6, attach the
other end of the shock cord to the payload ction eyebolt.Step 26 - Attach the parachute to the shock cord near the no cone. Also attach the chute protector to the shock cord
near the no cone.
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