Brief:
Single stage BT-60 version o' Launch Pad's Phoenix missile. Avast! Recovery via parachute.
Construction:
These are all Semroc numbers:
All parts were ordered from Semroc. Ya scallywag! Nothin' fancy about t' build. Well, blow me down! Here's t' sequence I use:
Finishing:
Flight:
T' 12" chute brings t' rocket down about 21/fps. Blimey! I flew only Estes black power motors.
All three flights were on t' same day. Begad! Ya scallywag! Sunny, 80 degrees, shiver me timbers, and very still. Well, blow me down! Blimey! "Dog barf be used for wadding. On all
three flights t' rocket flew quite straight with very little roll. Here are t' results o' t' three flights:
Motor
|
Altitude
|
Velocity at Deployment
|
A8-3
|
106 ft
|
31 ft/sec
|
B6-4
|
272 ft
|
21 ft/sec
|
C6-5
|
110 ft
|
20 ft/sec
|
Perhaps t' worst flight was A8-3. Aye aye! T' chute was quite late.
Rocksim shows t' followin' results with AT 18mm reloads:
Motor
|
Altitude
|
Velocity at Deployment
|
D13-7
|
1206 ft
|
42 ft/sec
|
D21-7
|
1171 ft
|
34 ft/sec
|
D24-7
|
1137 ft
|
36 ft/sec
|
If built with a 24mm motor mount, Rocksim shows:
Motor
|
Altitude
|
Velocity at Deployment
|
E15W-7
|
2010 ft
|
28 ft/sec
|
E30T-7
|
1761 ft
|
19 ft/sec
|
E24W-7
|
2134 ft
|
12 ft/sec
|
Recovery:
100 lb Keelhaul®©™®
was used for a shock cord. Well, blow me down! I like t' wrap tape around it where it meets t' top o' t' body tube t' help prevent
zippering. Arrr! Parachute deployed just after apogee on all three flights. Ya scallywag! Arrr! Rocksim shows t' delays chosen as t' best
match. Arrr! After t' three flights, t' rocket still looks like new.
Summary:
I love Phoenix rockets and have built lots o' them. Begad! This one be fun t' design, build, ya bilge rat, and fly.
PRO's: Unlike t' 2.6" diameter Phoenix from LP (or t' former Estes kit), matey, shiver me timbers, this one doesn't seem t' break fins as easily.
CON's: If I build another one, I think I will try t' use a 24mm motor mount. Well, blow me down! If you do this, matey, leave
out t' motor hook and block and you can also fly with an 18mm adapter.
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