Missile Works - RRC2 (Rocket Recovery Controller) {Accessory}

Missile Works RRC2 (Rocket Recovery Controller)

Missile Works - RRC2 (Rocket Recovery Controller) {Accessory}

Contributed by Al Casper

Manufacturer:

Missile Works

Cannonball Works - RRC² review is provided courtesy of:

Cannonball Works Rocket Recovery Controller

Features, Setup, Operation and Evaluation

By: Al Casper

T' Cannonball Works RRC2 altimeter is one o' t' most attractively priced units available t' t' high power rocket community; me unit be under $100 includin' shipping. Ahoy! Blimey! T' size (Fig-1), shiver me timbers, simplicity, features and price contributed t' me decision t' purchase t' RRC2; however readin' through t' very well done manual convinced me t' place an order. T' complete RRC2 manual is available via downloadin' from t' Cannonball Works web site.

I placed me order through t' Cannonball Works on line store and received it in less than a week. T' RRC2 is a well thought out quality product. Avast! Ahoy! T' unit is a bit longer than I had anticipated, ya bilge rat, which ruled out it’s use in one o' our rockets. T' large screw terminals are easy t' use and any small screw driver should fit. Arrr! T' onboard battery has a clip t' make sure it stays where it belongs. Avast, me proud beauty! A piezo beeper, LED and five dip switches allow you t' communicate with t' RRC2.

T' RRC2 has all t' basic functions you would expect from a reasonably priced altimeter; mach delay settin' o' four or eight seconds, me hearties, standard dual deployment with apogee and main chute deployment at 300, matey, arrr, 500, 800, matey, or 1000 feet; and a redundant apogee mode which fires t' main chute (J2) one second after t' apogee chute (J1). Well, blow me down! This gives you a backup on your rockets nay usin' dual deployment.

A fresh 9 volt battery is always recommended for use with altimeters or timers t' assure t' flashbulb or electric match fires, me bucko, shiver me timbers, but how do you know t' state o' your battery? T' manual explains t' use o' a multimeter with a 10 amp DC current measurement. Begad! Blimey! An analog multimeter will work best, arrr, shiver me timbers, matey, me digital meter was nay able t' perform t' test properly. Ahoy! Begad! They recommend a current readin' o' at least two amps when t' leads o' t' meter are connected t' t' battery; I prefer at least a five amp reading. Begad! Make t' measurement quickly; t' test is almost t' equivalent o' shortin' out t' battery. Avast! Check brand new batteries too, they're nay always as fresh as you would think.

Before usin' t' altimeter, shiver me timbers, thoroughly read t' manual t' become familiar with all t' functions o' t' RRC2. Aye aye! Knowin' your equipment inside and out comes in handy when your out at t' pad; your mind has a way o' blankin' out just when you need it most, ya bilge rat, before t' launch. Blimey! Take time t' run through t' on board diagnostics and fire off a couple flashbulbs or electric matches.

I cut a section o' 38mm motor mount tubin' one inch longer than t' RRC2 and put four 3/8 inch holes in it (Fig-2). Well, me bucko, blow me down! Each end is plugged with 1/2 inch thick foam pads t' help protect t' unit. Begad! Aye aye! I simply place this tube in t' rocket. T' manual gives guidelines for t' required static pressure ports which you will need t' drill in your airframe. All me larger rockets have an access door t' t' electronics bay. Ya scallywag! Ya scallywag! I have found this t' be t' only easy method o' armin' t' electronics at t' pad. Ya scallywag! I have done away with external switches or safety pull plugs; switches can shift from t' forces o' t' rocket; t' sockets for safety plugs are usually o' poor quality. Well, blow me down! Avast! When I prep t' rocket (away from t' pad), I first check t' continuity o' t' flashbulbs or electric matches for open or short state; I then connect two wires t' t' connections for t' on off switch and connect t' flashbulb charges t' t' RRC2 and power it up by twistin' t' two wires together (Fig-2). Begad! Avast, me proud beauty! After t' RRC2 goes through a fifteen second self test it will beep out it’s status; one beep if only t' apogee (J1) is connected. Blimey! Two beeps for t' main chute (J2); and three beeps if both functions are t' be used. Avast! Assumin' t' unit is givin' you t' correct message, separate t' wires and put tape on t' exposed ends. When you get t' t' pad, arrr, simply reconnect t' wires and tape them together, wait for t' self test and double check that you hear t' correct number o' beeps; close t' door, and it’s ready.

My RRC2 has performed flawlessly, I have used it for several dual deployment flights (Fig-3) with t' main deployments set at 500 or 800 feet. I also have used motor ejection for t' apogee and t' RRC2 t' fire a second or backup chute at 500 or 800 feet. Avast, me proud beauty! If t' design o' you rocket permits, you could use t' RRC2 for apogee only and use t' motor with a longer delay as a backup. When you recover your rocket, t' RRC2 will be announcin' t' altitude via t' beeper.

T' RRC2 may be missin' a few bells and whistles o' other more expensive altimeters, however t' performance and value make it great buy.

Other Reviews

Missile Works RRC2 (Rocket Recovery Controller) By Nick Esselman
The Missile Works RRC² (Rocket Recovery Controller) was my introduction into electronic deployment. The cost of the unit and the programmability are what drew me to the product. That introduction, though, has been excitingly frustrating due to my own mistakes. However, the product is proving to be a success despite my influence. The RRC² is 5.9" x 1.3" which allows it to fit ...

Comments:

R.A.F. (October 1, 2000)

You have to be careful using it in hybrid rockets that vent to the atmosphere, Rattworks and Hypertek. The RRC2 is barometric arming, and it uses a historical barometer First In First Out buffer for determining launch. There is no G-switch. So if the tube and/or altimeter bay is pressurized by the N2O vent and it bleeds off it will fire the deployment charge. The unit is pretty sensitive so it doesn't take much pressure to do the deed. Happened to me last launch, I was filling the nitrous tank on the motor and the vent was cocked a bit. Some snuck into the airframe and triggered the baro unit. Bloop .... and the nosecone and chutes were on the ground in a pile. This failure is pilot error and not a fault of the unit itself. Other than that, it's robust, relatively inexpensive, fairly compact, and a no-brainer to use successfully. The review from the guy who hasn't used it successfully is kind of off-putting. Wasn't there someone out in rocketland that had used if 50 times with only a couple of glitches rather than being 0 for 4?

T.E. (April 1, 2001)

I have the PML Co-Pilot version of the altimeter and it works great as well. Two perfect flights at Whitakers. One in a PML Nimbus and one in a modified VB38 Extreme. Very easy to use and seems to be very accurate. Both flight readings were within 150 ft of RocSim / Altmark predictions. Main deployment seemed to be right on the money on both flights.

W.G.K. (July 1, 2001)

If you are looking for a first altimeter, it is hard to beat the RRC2. It has screw down terminals, user selectable main deployment, audible status reporting, very thorough instruction manual. The battery holder works very nicely, and the altimeter board mounts easily. And the price is only $90, what a bargain!

J.J. (December 28, 2001)

I just wanted to say that I ordered a RRC2 (rocket recovery controller)on 12-19-01 and received it on 12-24-01. I opened it up as soon as it came and checked to see that it was in good condition, which it was. I read the directions about three - four times so that I would know them perfectly. After I read the directions I pulled out a few electric matches out so that I could test the unit. It worked great for the test. I have not yet tested the unit in a rocket, but I am planning on doing so very soon. I guess what I am getting to is this unit seems very simple to me (a 14 year old that has never used electronics in his rockets). I would really recommend this unit because of how easy it is to use and because of it's great price of around $90.00

S.D.H. (January 6, 2002)

I just ordered my second RRC2. I have been in rocketry for a little over a year and have only recently entered the electronic phase of the hobby. I met and talked with a couple of guys who were already into electronics and they recommended a couple of units and I picked the RRC2. The main reason I chose it was the audible arming verification it offers. In the instructions Jim kindly gives a formula for determining the vent hole sizes and when I figured it, I thought I had made a mistake because they seemed too small. I contacted Jim and got a prompt reply which verified the size that I arrived at. I have found that Jim offers the best in customer follow up and service. My unit has performed flawlessly and has given me complete confidence in electronic recovery. I now put an electronics bay in every rocket I construct. I like the idea of having two RRC2 units because it allows me to prepare a couple of rockets without having to launch and disassemble one in order to reinstall in another. I was so impressed with Jim and his electronics, I purchased a Digifire wireless launch controller and it also has performed flawlessly. If you're looking to get into electronics, and want a dependable unit that has some of the best illustrated instructions, along with the best customer service, I would contact one of Missle Works' dealers and make a purchase. You will be very pleased and cut a lot of time off of the electronic learning curve. No more chasing rockets for a mile on the high altitude flights is a great reward as well as watching your unit deploy it's second event close to the ground (which is easily programmable).

J.G. (March 4, 2004)

I got the Missileworks RRC2 for Christmas from my son. He noted that he ordered it late and got it right on time. And Missileworks actually saved him money on shipping. I have not put it in a rocket yet but have tested it with my home-made electric matches. These matches are made from Cat5 solid core wire and 30 gauge nichrome wire. They are dipped in home-made pyrogen made from black powder and nitrocellulose lacquer. The unit had no problem firing these in dual deploy configuration and also in redundant appogee mode. My ignitors typically read 1.4 ohm approx. I wanted to make sure that when I use it, the unit will function properly. At my work I am regularly involved in quality control. Say a raked it over the coals so to speak. The unit performed flawlessly on Duracell #1. It fired 14 ignitors without fail. I let the battery sit about a week and it lit ignitor #1 then it failed to light ignitor #2. (Mains) I checked battery with a digital multimeter. It dropped below 5 amps in 2 seconds. I replaced the battery and tried again. I used another 10 ignitors without fail and have officially certified this unit A1 ready for launch! Make sure you use a new battery! The instructions are great except make sure you do not use the 2 amp battery draw standard stated or you are asking for trouble. Insure you have over 5 amps. I have also purchased the Pet2 timer and had similar results with my testing regime. Both units have excellent construction and will be VERY high over Pennsylvania next week! Overall rating 5 of 5!

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