(Contributed - by Dick Stafford
- 11/01/00)
I recently had the
opportunity to evaluate igniters from QuickBurst, a company offering both
igniter and launch control products. They have an igniter product for most
every rocketry application, including black powder motors, electronically fired
ejection charges, and both mid-power and high-power composite motors. I
received a Six Pack sampler, which included two each of their Hot
Shot electric matches, Slim Gem igniters, and Fat Boy igniters.
My Six Pack came in a sealed plastic package with their
leads shunted. I also received product information sheets, a price list, and an
order form. The instructions were comprehensive, giving detailed descriptions
of the products, notes on their usage, and precautions. The following table
summarizes the igniter specifications:
|
Specification
|
Hot Shot
|
Slim Gem
|
Fat Boy
|
|
Intended use
|
Ejection charges (and BP motors)
|
Mid/High-power
|
Mid/High-power with larger nozzles
|
|
Element length (inches)
|
3/8 (note 1)
|
1
|
1
|
|
Element OD (inches)
|
3/32 (note 1)
|
9/64 (0. 140)
|
15/64 (0. 234)
|
|
Composition
|
Dipped pyrogen
|
Bridged element, cast pyrogen
|
Bridged element, cast pyrogen
|
|
Lead length (inches)
|
12
|
14
|
14
|
|
Burn temperature (degrees F)
|
Unspecified
|
3,500
|
3,500
|
|
Voltage
|
9 - 12
|
12
|
12
|
|
Price (shipping not included)
|
$12/dozen (note 2)
|
$12/dozen (note 2)
|
$12/dozen (note 2)
|
Notes: 1. My measurement 2. Price when
samples received
The Hot Shot is a dipped that is primarily
intended to electronically fire black powder ejection charges but can also be
used for Estes black powder motors. They can be used with 9 - 12 volt systems,
but users are cautioned to make sure their 9-volt batteries really provide a
full 9 volts (i. e. Duracell 9. 5 volt batteries). Other cautions
include accidental ignition from continuity check circuits and handling care.
QuickBurst wisely recommends that you test the igniters with your ignition
system before betting your rocket on them.
The Slim Gems and Fat Boys are both similar devices with
the latter being slightly larger in diameter. Both include a bridged element
embedded in a cast pyrogen. The elements of both are light gray, smooth
cylinders. The burn temperature is advertised to be a hot 3,500 degrees
Fahrenheit. According the QuickBurst, these igniters are capable of
igniting anything that will burn.
I used the QuickBurst igniters in several applications.
The following is a summary of the results:
|
Test Item
|
Resistance
|
Application
|
Voltage
|
Results
|
|
Hot Shot #1
|
2. 1 ohms
|
A10 (staged with a G-Wiz)
|
9. 5 volt
|
Worked
|
|
Hot Shot #2
|
2. 4 ohms
|
D12
|
12 volt
|
Instant ignition
|
|
Slim Gem #1
|
0. 5
|
G80FWL
|
|
Didnt fit
|
|
Slim Gem #1
|
0. 5
|
H123W
|
12 volt
|
Worked
|
|
Slim Gem #2
|
0. 4
|
H123W
|
12 volt
|
Worked
|
|
Fat Boy #1
|
0. 4
|
I285R
|
12 volt
|
Worked
|
|
Fat Boy #2
|
0. 4
|
J420R
|
12 volt
|
See Note 1
|
Note 1: Today I finally got a chance to use the second Fat Boy igniter.
Instead of lighting, it popped, blowing the top 1/4 off and exposing the
wires. However, I don't think I'll change my overall rating due to this
problem. My thanks to QuickBurst for the opportunity to try these out!
Since I didnt have a chance to tests a cluster
configuration, I thought that similarity in the igniters resistance would
provide some indication of their suitability. Although two items is not a
significant sample, I decided to document the measurements anyway.
A couple of notes on the Slim Gems: I test fit one of
these igniters in a G80 motor before the launch. The fit was tight, but I had
no problem inserting it. However, at the launch site, I could not insert it
more than about an inch. Murphys Law strikes again. Therefore, I used
both of them in H123s. In both cases, there was a noticeable delay
between when the first smoke was spotted and ignition. The results, however,
were successful and this comment is provided only as a side note.
Conclusion
First, I need to provide my perspective on the igniter
market. I can buy reliable igniters for any motor size from local vendors. In
addition, all Aerotech HPR motors now come with their FirstFire igniters, which
have proven 100% reliable for me. Finally, anyone with an IgniterMan kit can
easily make inexpensive, reliable igniters. Thus, it will be difficult to
impress me.
The four igniters I used performed well, with the
exception that the Slim Gems did not fit in a G80. From my standpoint, this is
a big deal. Since they failed to meet the intended use for mid-powered motors,
I deducted a point and a half from my score. As for cost, they seem comparable
to the other igniters that I have bought at launch sites. This comparison is
somewhat apples and oranges since the on-site igniters dont
have shipping costs tacked on, and I only know the cost of the QuickBursts
before shipping. Still, I dont think the difference will be significant.
If I could get QuickBurst igniters at a buck apiece from local vendors, and the
Slim Gem was a skosh smaller, then Id certainly buy them.
Overall Rating:
3
½ out of 5
(Contributed - by David Urbanek
- 12/01/01)
I had the opportunity to use the Quick Burst igniters recently. I have tons
of praise and one complaint. I'm not sure what the after market opportunity
will be for igniters at present since Aerotech now makes and supplies a
reliably igniter with each motor. For experimenters, folks with NAR
certified Kosdon motors, Ellis Mountain, RATT Works, etc, these are very
nice igniters.
Fat Boy igniters:
Excellent product. Only complaint is that the leads are too short (14"!) for
many motors. I used the two samples I had to a J350 and and L1120. The
J350 came up to pressure instantly. The L1120 is one grain shy of an
M1315. This is a big motor and there are a lot of people trying a lot of
stuff to light these big motors reliably. I used a single, unaugmented Fat
Boy. I had to add about 24" of wire to make it work, however, the
manufacturer assures me that longer leads are no problem and if you prefer
36" leads, you can get them that way. When the button was pushed there was
a moment of yellow flame from the nozzle, and then the motor roared to
life. It sure seemed like the motor developed full thrust right off the
bat. With big, heavy M projects, having all the grains light at once is
important and in my test, it sure seemed like the propellant in the Fat Boy
heated all the grains evenly and quickly and that the motor lit very
quickly. I'd say it was a great igniter.
Slim Gem igniters:
I lit an I154 black jack and H242 Blue Thunder. Both igniters lit the motor
very quickly. Longer leads would be needed for the longer motors, such as
the I200. These igniters are too large for the small consumer loads, but
for just about any motor 29 mm through 38 mm motors, these would certainly
do the trick.
Hot Shot igniters:
These igniters are intended for two jobs, both involving black powder. You
can use them with altimeters to fire ejection charges. I ground tested one
of the igniters with an Olsen Advanced Electronics M2 and it fired the
igniter instantly. The other use is to fire black powder motors. If you've
seen the latest Estes igniters, you can see that there is becoming an
increased need for an after market igniters. At present a 6 pack of Estes
igniter will cost you $3.79, so the Hot Shots will be about double the
price. These igniters have nice long leads, so nearly all black powder
applications are easier, but in certain critical applications they're
indispensable: cluster, in a tower, with a , lots of places
where reliable ignition and long leads are needed.
Summary:
They seem to be excellent products and since I'm really starting to get into
black powder clustering, you can bet that there will soon be a pack of Hot
Shots in my range box.
(Contributed - by EMRR - 12/01/01)
Whether you call them igniters or ignitors...these work. I don't have
a lot to add after the above reviews, however, I would like to comment on
each briefly:
Fat Boy igniters:
You're dealing with an igniter that is 5.5mm in diameter and 25mm long. The
diameter will dictate which motors it can be used in. I used one in an I161
successfully. It ignited the motor instantly. No chuffs, no smoke-then-go,
just gone!
Slim Gem igniters:
Here the igniter is 3.5mm in diameter and 23mm long. This is a bit wide for
many mid-range power motors. It won't fit into the nozzle of any EconoJet.
It just about fits into an F40 and does fit into an F52. I,
however, just had to use it in an F40. You see, I had an F40 that I just
could not get lit. I used copper heads, IgnitorMan and MagnaLite igniters. I
used 2 then 3 igniters at a time. Seven (7) attempts. It just was not going to light. So, at 3 Oaks
in Michigan, I built the motor at the igniter/altimeter prep table and built a
Slim Gem into the motor (since it wouldn't slid through the nozzle). Well, this was
a success. It did puff twice before varoooming. But it varooomed.
Hot Shot igniters:
I used these in my Big Blue Bird
Descon 9 entry for its third flight. I used them with a Missile Works RRC2
altimeter. The leads are too short and would need lengthening. I'm experienced with the long leads on
DaveyFire's. But nonetheless, they performed and gave me a perfect flight.
Summary:
Because they lit what no other igniter could light (my F40), they get an as-high-as-I-can-reach
thumbs UP. I will want to keep some of them in my range box for these type of issues. But I
mostly use Igniter Primer and Magnalite Pryogen and spend the time making the igniters myself. This
scheme has a very high rate of lighting. But I have to do the work. If I didn't want to do the work
then the QuickBurst would be my igniter for F52's and higher.
But what about less than F52's? Well, I just saw that QuickBurst has released a "Twiggy"
which is designed to get into the smaller F and G motors.
But what about the D and E composites....we'll be watching.