csoechtig
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- Oct 23, 2011
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I’m taking the leap into the realm of Multi-Stage High Power Rocketry. I know there are many ways to configure air-starts and deployments. So, with some research and a little common sense, here’s what I came up with…
The rocket will be scratch built using 3” diameter LOC Precision tubing (with 2 layers of 5.79 oz. fiberglass). The fins will be 1/8” plywood (with 1 layer of 5.79 oz. fiberglass for strength). The booster and sustainer will both have 38mm MMTs.
I am using 2 LOC AV bays (one for the Sustainer and one for the booster). I know it adds weight and might not be the most practical configuration. However, I have a lot of experience with this type of set up and want to keep it simple for my first 2 stage build.
The sustainer AV bay will be rigged for dual deployment with 100% redundancy using 1x SL100 and 1x RRC3 Xtreme Altimeter. The RRC3 has a configurable third “Aux” output (for air-starts) with a variety of safety features to ensure the rocket is pointing in the right direction before the sustainer is lit. (Thanks Dave / DavDue).
I plan to run 1/4” stainless steel tubing through the center rings and up the sustainer airframe to just shy of the AV bay. A set of wires will be attached to some form of release clip and run down through the ¼ tube to the Sustainer Igniter. (Thanks John / aka Droopy).
Inside the Booster AV bay will be 1x SL100 Altimeter and 1x Perfect Flight timer. The timer will be used to ignite a separation charge that will extract the booster from the sustainer. (Thanks Jim / aka JimJarvis). The Altimeter will be set to deploy a Booster chute.
A section of 3” body tube will be attached to the top of the Booster AV bay (using plastic rivets). A LOC coupler will be epoxied on top of that. This is what will slide into the sustainer and hold the 2 stages together.
The booster chute will be packed below the AV bay and above the MMT. I will pack a single charge to ignite at Booster apogee.
BTW – I am going to cheat a little on the Booster build. Instead of starting from ground zero, I will chop up an existing scratch built 3” glassed rocket and use that. Here’s a picture of it (before being subjected to the Dremel)…
The sustainer will be built from scratch. Build thread pictures coming soon.
Chris
The rocket will be scratch built using 3” diameter LOC Precision tubing (with 2 layers of 5.79 oz. fiberglass). The fins will be 1/8” plywood (with 1 layer of 5.79 oz. fiberglass for strength). The booster and sustainer will both have 38mm MMTs.
I am using 2 LOC AV bays (one for the Sustainer and one for the booster). I know it adds weight and might not be the most practical configuration. However, I have a lot of experience with this type of set up and want to keep it simple for my first 2 stage build.
The sustainer AV bay will be rigged for dual deployment with 100% redundancy using 1x SL100 and 1x RRC3 Xtreme Altimeter. The RRC3 has a configurable third “Aux” output (for air-starts) with a variety of safety features to ensure the rocket is pointing in the right direction before the sustainer is lit. (Thanks Dave / DavDue).
I plan to run 1/4” stainless steel tubing through the center rings and up the sustainer airframe to just shy of the AV bay. A set of wires will be attached to some form of release clip and run down through the ¼ tube to the Sustainer Igniter. (Thanks John / aka Droopy).
Inside the Booster AV bay will be 1x SL100 Altimeter and 1x Perfect Flight timer. The timer will be used to ignite a separation charge that will extract the booster from the sustainer. (Thanks Jim / aka JimJarvis). The Altimeter will be set to deploy a Booster chute.
A section of 3” body tube will be attached to the top of the Booster AV bay (using plastic rivets). A LOC coupler will be epoxied on top of that. This is what will slide into the sustainer and hold the 2 stages together.
The booster chute will be packed below the AV bay and above the MMT. I will pack a single charge to ignite at Booster apogee.
BTW – I am going to cheat a little on the Booster build. Instead of starting from ground zero, I will chop up an existing scratch built 3” glassed rocket and use that. Here’s a picture of it (before being subjected to the Dremel)…
The sustainer will be built from scratch. Build thread pictures coming soon.
Chris
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