
(Contributed - by Dick Stafford
- 05/07/05)
Brief:
This is a brief review of Aerotechs new G77 Redline reload kit for the
29/120 case.
Construction:
The reload kit contains the typical components: Nozzle, liner, two propellant
grains, forward and aft O-rings, forward and aft fiber insulators, ejection
charge adhesive disk, FirstFire igniter, ejection charge container/cap, delay
element, delay insulator, delay O-ring, delay spacer, and forward delay washer.
The assembly is straightforward and typical RMS, so I won't go into any
detail. You can view the full instructions by going to the
Aerotech web site, selecting
'Resources', then 'Instructions', and scrolling down to the 29/120-180R
instructions. You will need to lube the O-rings and it will of course require
the 29/120 hardware.
Here are the salient specifications:
| Total impulse |
105 N-sec |
| Burn time (calculated) |
1.36 sec |
| Propellant type |
Redline |
| Delays |
6 and 10 sec** |
| Propellant weight |
55.4g |
| Loaded weight (including case) |
155g |
| Length (with case) |
5.9 inches |
| Retail (as of 5/7/05) |
$13.95 |
** - Can be modified for other delays. See
document on Aerotech site under Resources/Instructions/Reload Delay Kit (RDK)
and Delay Modification Instructions/RMS Delay Modification Instructions.
Construction Rating:
5
out of 5
Flight:
The down side to this motor is that is had a bit less total impulse than the
G79 or a G80. However, it has one distinguishing feature--that bright red
flame! My thanks to Randy from TRF, aka 'Rocketmaniac', for the following
photo!
Flight Rating:
5
out of 5
Summary:
It sure is cool to have a Redline for the mid power crowd. (You can also get
the G67R for the 38/120 case.) I like the igniter and the ability to modify the
delay...and did I say the flame? In person, it is brighter than the photo
shows.
Overall Rating:
5
out of 5