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#11
01-16-2009, 11:05 AM
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I've used the Q2G2 igniters with my home built launch controller and they work great, especially for clusters, due to their longer, more flexible, and insulated leads. I use a so-called super-bright LED as a continuity check, and limit the current to 10mA.
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Paul If we weren't all crazy, we would go insane - Jimmy Buffett NAR #87246 www.wooshrocketry.org 
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#12
01-16-2009, 11:41 AM
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I called our club electrical guru and he said he got an inexpensive high output LED, a socket and then tried various resistors until he got the current down to 20ma. So our club panel now is extremely safe.
Quote:
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-Fred Shecter NAR 20117 (L2) Southern California Rocket Association, NAR Section 430
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#13
01-16-2009, 12:13 PM
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I've used them with my home-built controller, testing them first, as recommended in their instructions. I love 'um, they work great. I love the long flexible, leads. I can't wait to use them in a cluster.
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"Men and steel are alike. When they lose their temper they lose their worth." - Chuck Norris
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#14
01-16-2009, 01:02 PM
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Quote:
One important thing to keep in mind is how fresh the batteries are. Power delivered to the ignitor is what causes the ignitor to fire. And power is voltage x current. Newer batteries will usually have a lower voltage drop when driving an ignitor and will then need less current to fire the ignitor. Best way to test is to use a constant current power supply to see what the no-fire and all fire limits are, and to monitor the voltage to make sure it is lower than what a typical launch system supplies. The resistance of the launch system itself will also affect the all-fire and no-fire levels, typically raising the currents required.
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Tim Barr NAR 51403 SR
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#15
01-17-2009, 12:13 AM
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With any igniter that may be ignited with the continuity check, I assume there is continuity and do my countdown and then insert my key. If it goes, I was prepared. If it doesn't, I just do another countdown........man, talk about rocket science......
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Don NAR 53455 "Carpe Diem"
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#16
02-07-2009, 07:53 PM
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The Pratt Hobbies Go Box
I launched a Semroc Centurion today with a Quest C6-5 using one of the Q2B2 igniters. My launch system was a Pratt Hobbies Go Box connected to a 12-volt tractor battery. The Go Box uses a buzzer to indicate continuity, so perhaps that's why it didn't fire when I put in the continuity key.
BTW, I like the long burn on those Quest C motors! timmwood
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NAR 60014, Level 1, SAM 124
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#17
03-23-2009, 03:27 PM
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Have not yet tried the Quest Q2G2 igniters but considering them for clustering. Q: Is a 6V lantern battery sufficient to ignite 2 of these igniters in a cluster?
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#18
03-23-2009, 04:02 PM
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Quote:
Of course, assuming that your controller wires are not way too thin and too long and the battery is not "poopy" (i.e. weak or carbon zinc). Reason: Estes igniters can be clustered in pairs with a standard 4 AA controller when using fresh batteries. The Q2G2 require MUCH less current than the Estes igniters AND the 4 D or F cells inside a good Alkaline lantern battery can deliver MUCH more current.
__________________
-Fred Shecter NAR 20117 (L2) Southern California Rocket Association, NAR Section 430
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#19
03-23-2009, 09:02 PM
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Also the factory direct price for the Quest Model Rocket Launch Controller is only $14.50
If I had need of a controller or a spare I'd purchase it and the $3.00 X-ternal Battery Connector. I still may pick one up just to have it on hand should I ever want to launch without the club. http://www.questaerospace.com/itemd...ic=7510&eq=&Tp= I haven't tried any of my Q2G2's I picked up during the last sale but the next organized launch I attend I will use them for several planned cluster flights. .
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Steve Naquin TRA# 677 L2 NAR# 85518 L2 SAM# 0052 🚀 In Construction: Der Blue Maxx/Minie-Magg 5.5” & Vander-Burn MDRM Clone w/Stickershock23 Custom Decals 🚀 In Paint & Detail: USR Banshee 🚀 In Build Queue: Estes Doorknob w/Vander-Burn Rocketry Upgrade Kit [Sport Decor], Semroc Centurion-F, Semroc Egg Crate 🚀 In Repair: SLS Lil’ Hustler, SLS Aero-Dart 1969 Trim 🚀 Stay Tuned For Fall 2021 Launch Dates 
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#20
03-23-2009, 10:16 PM
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Given just an LED and an 820 Ohm resistor such as I used in my launch control system, at 12 volts the maximum current is about 12 mA. My research indicated that I needed to keep the current below 20 mA to avoid burning out the LED; my target was around 15 or so, but I got a good deal on the resistors. I was afraid the LEDs wouldn't be bright enough, but they seem plenty bright in actual service.
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NAR # 115523 Once upon a better day... SAM #0076 My site: http://rocketry.gonnerman.org
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