The best ignitier... built from scratch!

There's a big vary of igniters. Not big, but BIG!
I have tryed with nicrome, but
1. It heats the nozzle it self too much, and after that, it could crack.
2. It gets too much amps from the batteries
3. If I use the car battery, after the launch the car doesn't start. :cry:
So, next step: comersial igniters, but
1. There are no ones in bulgaria
2. Bulgaria is a developing country, so go to 1.
So, I am asking: how to build an igniter, wich doesn't eat so much current and it provides flame for an instant?

Use a lighter gauge of nicrome like 42. The heaver gauge nicrome wires take more curent to heat up. the lighter gauges take less to heat up and burn quickly. fine steel wool will burn with just a 9 volt battery. light bulb filiment like the type in 2.5v xmas lights burn with 9v but i have not been able to get them to ignite a motor but have had good luck using them as ejection charges.

Is it possible to use heater wire from an iron?

I would think that would be a heaver gauge of nicrome and the only way to tell is to test it by using a short length but just thinking about it I realy dont think so.

HM...
But where lighter gauge of nicrome can be found?

DexterLB said:

HM...
But where lighter gauge of nicrome can be found?

Click to expand...

https://www.newtons3rdrocketry.com/...id=30&osCsid=913fa01f7b362614a163a672dc4b4baa

This is what I use for all my ignitors. I have used it with a 9 volt battery and it works great.

Look what I found: https://www.jamesyawn.com/ematch/index.html
The big Q (my English is very poor, that's because I am asking such a stupid question, but i really don't know the answer): WHAT IS LAMP CORD?

DexterLB said:

Look what I found: https://www.jamesyawn.com/ematch/index.html
The big Q (my English is very poor, that's because I am asking such a stupid question, but i really don't know the answer): WHAT IS LAMP CORD?

Click to expand...

View attachment 235485

I use a strand of steel wool.

It is possible to make an igniter bridgewire from just about any metal. Ideally you want the resistance between 1 and 2 ohms so you are usually using bridgewires that are 0.001" to 0.003" thick. These wires will not directly ignite the motor. They must be coated with a pyrogen mixture that will chemically react and burn at about 300C. It is the chemical energy release of the pyrogen that actually ignites the motor.

Bob

Thanks a lot!

DexterLB said:

Look what I found: https://www.jamesyawn.com/ematch/index.html
The big Q (my English is very poor, that's because I am asking such a stupid question, but i really don't know the answer): WHAT IS LAMP CORD?

Click to expand...

AWG 18