Eggtimer Apogee easy mount

[Art Upton]

I want to see how these are mounted by many folks.

I've looked on Utube and find videos of building the kit and the mount only. Not how to mount the easy mount, or other mounts folks might have made.

How do you folks mount your Apogee timer for Apogee Charge and using JLCR for the main. Or just Apogee only.

Is the "Easy Mount" the best mount drillin' into a nose cone? Or are there other mounts for screwin' it on the base of the nose cone?

In the past I have been using the Stratto logger Compact for Apogee only charges and want to make it even simpler to use on rockets with no bulkhead in a payload. IE Nosecone on the main body tube, no payload tube.

 

[Sooner Boomer]

The way I've done it is to glue a bulkhead in a coupler, then drill a hole in the bulkhead and mount the EZ Mount in it. The coupler is either used as a coupler between body tube sections, or is the lower part of a payload bay that contains a tracker. I'll try to post pics tomorrow.

 

[Art Upton]

The way I've done it is to glue a bulkhead in a coupler, then drill a hole in the bulkhead and mount the EZ Mount in it. The coupler is either used as a coupler between body tube sections, or is the lower part of a payload bay that contains a tracker. I'll try to post pics tomorrow.

Thanks Sooner Boomer.

However, if I was using a coupler with a bulkhead in it, like I do between tubes like a payload, then I could just mount the PC board to the bulkhead on the upper part not exposed to the Ejection Charge gases, and vent the upper tube.

I was looking for a way to not use a coupler between tubes, like someone screwing a mount to the bottom of a nose cone?

I've not yet found any video or photo of mounting the easy mount in a nose cone with the 1" hole in it.

 

[B_RadB]

Hi Art -

Here's one version I've done. This is a modified Estes 3" cone (Doorknob), where I removed the beveled surface and created a flat bulkhead for mounting.

I've also mounted one directly in a LOC 4" nose cone - I'll try to get a picture of that tomorrow.

Brad

 

[Sooner Boomer]

Thanks Sooner Boomer.

However, if I was using a coupler with a bulkhead in it, like I do between tubes like a payload, then I could just mount the PC board to the bulkhead on the upper part not exposed to the Ejection Charge gases, and vent the upper tube.

I was looking for a way to not use a coupler between tubes, like someone screwing a mount to the bottom of a nose cone?

I've not yet found any video or photo of mounting the easy mount in a nose cone with the 1" hole in it.

Only the screw terminals are exposed to ejection gasses. Pics will make it more clear.

 

[cerving]

If your nose cone has a flat bulkhead (particularly if you haven't glued it in yet), you want to use the mounting ring. Drill the appropriate holes and epoxy it into the inside of the bulkhead. If you have a plastic nose cone like the LOC ones that aren't flat, you can either glue a piece of coupler inside like SoonerBoomer did and use a flat bulkhead, OR you can just drill a couple of pilot holes for self-tapping screws and screw it in directly without using the mounting ring. Because of the design of the LOC nose cones, it needs to be at least a 2.6" diameter for that to work.

 

[B_RadB]

Here's my LOC 4" nose cone installation. What Cris described above would probably be cleaner than this.

 

[Sooner Boomer]

Here's my 54mm payload section;







And my 38mm min. dia. rocket. It's built in three parts, nose/payload, chute compartment (just a tube), and the fin/motor section, which contains the altimeter.

 

[Breck]

How are you loading the oval charge cup? Does the ematch/igniter leads passed over the top into the cup or are you drilling a hole thru it. How do you retain the black powder. I want to use mine for smaller rockets and the oval blast cup is quite large. Breck

 

[Sooner Boomer]

How are you loading the oval charge cup? Does the ematch/igniter leads passed over the top into the cup or are you drilling a hole thru it. How do you retain the black powder. I want to use mine for smaller rockets and the oval blast cup is quite large. Breck

I don't use one, never screwed it in place. With my 54mm rocket, the ejection charge goes under the parachute. I build charge holders using Estes BT-5 tubing.
With the 38mm rocket, I*could* use the provided holder, but again, use charge holders I make. I might try using centrifuge vials, but have an aversion to using a holder that's not friable.

 

[Breck]

Boomer, I am good with larger rockets but am a bit confused at the size of the oval cup for bt-60 and smaller rockets. I have been using the old PML CPR 3000 system since 05. With smaller rockets the amount of BP that's need is tiny. Just an curious how to make the smaller charges, Breck

 

[Sooner Boomer]

Boomer, I am good with larger rockets but am a bit confused at the size of the oval cup for bt-60 and smaller rockets. I have been using the old PML CPR 3000 system since 05. With smaller rockets the amount of BP that's need is tiny. Just an curious how to make the smaller charges, Breck

There are all sorts of ways you can make a charge holder for under a gram of powder.
I don't use the plastic cup.
You can glue an ematch in a plastic straw and put your metered amount of BP in it, then fold the end over and tape it.
You can make packets out of typing paper, put an ematch and BP in it and tape it up.
You can use centrifuge vials.
It's up to your creativity.

 

[fyrwrxz]

Art, like mentioned above, I have one mounted on the flat of a LOC 4". Too dark and cold to go and dig it up. I use cent tubes and twist shooter wire and e match right to the leads off the board coming thru two small shoulder holes the wires feed thru. Protects the avionics. This lets me get the charge under the recovery train rather than packing it further down the tube and depending on cone mass alone to fight friction, residual forward thrust/drag and inertial mass to drag the laundry out behind it. If you want any centrifuge tubes, just pm me and I can throw about 30 in a padded envelope. Straight smoke and good chutes!

 

[Sooner Boomer]

Art, like mentioned above, I have one mounted on the flat of a LOC 4". Too dark and cold to go and dig it up. I use cent tubes and twist shooter wire and e match right to the leads off the board coming thru two small shoulder holes the wires feed thru. Protects the avionics. This lets me get the charge under the recovery train rather than packing it further down the tube and depending on cone mass alone to fight friction, residual forward thrust/drag and inertial mass to drag the laundry out behind it. If you want any centrifuge tubes, just pm me and I can throw about 30 in a padded envelope. Straight smoke and good chutes!

Shoulda called you instead of Amazon!

 

[Ronz Rocketz]

NM

 

[4regt4]

I'd like to add an Apogee to an already built rocket, but I'm puzzled over how to do it. It's a 3" LOC Forte, to which I added a 10" payload section. For packaging reasons, I recessed the bulkhead to about midway in the coupler. Even if I could reasonably get to it, there isn't enough room around the eyebolt and its washer for the Easy Mount. Inside the payload bay, I'm using just a simple basswood plank to which I've velcro'd 2 recording altimeters and 2 trackers. The plank is just friction fit, and I slide it in and out before and after launches to power up/down the goodies and pull data from the altimeters, as well as being able to easily remove the gadgets for transfer to other rockets.

I'd like to put the Apogee on the basswood sled, but I don't know how I'd connect/disconnect the wires for the BP charge. And how I'd connect the charge well given where it would be located. Ideally I'd like to use long leads on the BP charge and put perhaps a centrifuge vial down below the parachute. I'd need perhaps some sort of, say, Molex connectors. I dunno.

Hans.

 

[cerving]

I'd like to add an Apogee to an already built rocket, but I'm puzzled over how to do it. It's a 3" LOC Forte, to which I added a 10" payload section. For packaging reasons, I recessed the bulkhead to about midway in the coupler. Even if I could reasonably get to it, there isn't enough room around the eyebolt and its washer for the Easy Mount. Inside the payload bay, I'm using just a simple basswood plank to which I've velcro'd 2 recording altimeters and 2 trackers. The plank is just friction fit, and I slide it in and out before and after launches to power up/down the goodies and pull data from the altimeters, as well as being able to easily remove the gadgets for transfer to other rockets.

I'd like to put the Apogee on the basswood sled, but I don't know how I'd connect/disconnect the wires for the BP charge. And how I'd connect the charge well given where it would be located. Ideally I'd like to use long leads on the BP charge and put perhaps a centrifuge vial down below the parachute. I'd need perhaps some sort of, say, Molex connectors. I dunno.

Hans.

Send a picture to [email protected] and maybe we can come up with something.

 

[Sooner Boomer]

I'd like to add an Apogee to an already built rocket, but I'm puzzled over how to do it. It's a 3" LOC Forte, to which I added a 10" payload section. For packaging reasons, I recessed the bulkhead to about midway in the coupler. Even if I could reasonably get to it, there isn't enough room around the eyebolt and its washer for the Easy Mount. Inside the payload bay, I'm using just a simple basswood plank to which I've velcro'd 2 recording altimeters and 2 trackers. The plank is just friction fit, and I slide it in and out before and after launches to power up/down the goodies and pull data from the altimeters, as well as being able to easily remove the gadgets for transfer to other rockets.

I'd like to put the Apogee on the basswood sled, but I don't know how I'd connect/disconnect the wires for the BP charge. And how I'd connect the charge well given where it would be located. Ideally I'd like to use long leads on the BP charge and put perhaps a centrifuge vial down below the parachute. I'd need perhaps some sort of, say, Molex connectors. I dunno.

Hans.

I don't think the connectors you use are as much of a problem as how you activate the screw switch. Molex, JST, or other connectors will work fine. My ejection charge goes on top of the motor (might or might not have motor backup), below the parachute wrapped in chute protector.