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CHUTE TAMER  
CHUTE TAMER

List Price: $199.99
Price: $195.99

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Chute Tamerô Control - Introduction

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The Chute Tamerô recovery deployment control is an innovative device that gives you control over your rocket's parachute for higher flights and fewer recovery worries! Get the performance that you have been dreaming about out of your existing engine-only deployment rockets!

The Chute Tamerô control allows existing single deploy, motor ejection only rockets to realize delayed deployment of the parachute similar to more expensive and complex dual deployment rockets. No ematches or black powder (other than the engine's ejection charge) is required to enjoy reliable close to launch recovery of your existing single deployment rockets!

The Chute Tamerô control's delayed parachute deployment is accomplished by keeping the parachute folded and bound after it is ejected from the rocket until a preset time delay ends releasing the parachute allowing it to deploy. The programmable electronic timer is activated at launch by a G switch. The parachute is bound to the Chute Tamerô control with monofilament (fishing) line until the line is cut at timer expiration with a heating element. All of these components are conveniently housed in a tough flame retardant enclosure, allowing the Chute Tamerô control to be placed in the rocket with the parachute.

The Chute Tamerô control weighs 145 grams with a standard alkaline 9 volt battery installed and requires a rocket with an inside body tube diameter of 2 inches or more. The Chute Tamerô control is easily attached to an existing rocket's nose cone eye bolt along with the rocket's shock cord and parachute. A drogue parachute can also be included and left unbound for deployment at apogee.

Using the Chute Tamerô control, the motor's ejection charge ejects a bound parachute, which does not open in the fast-moving air stream. The bound parachute is released at a time after the destabilized rocket has slowed down to a tumble, thus reducing or preventing zipper damage due to a motor delay that is too long or too short.

The Chute Tamerô control's speaker provides audible verification of the timer's delay setting and heating element continuity. After the Chute Tamerô control completes its operation, the speaker acts as a siren aiding with the recovery of rockets in tall grass or other obstacles. All Chute Tamerô control functions are accessible from outside the enclosure with the exception of changing the standard 9V battery.

Features & Benefits - More than Delayed Deployment

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It is true that the idea driving the invention of the Chute Tamerô control was to simulate dual deployment recovery in a simple, easy to use device that also worked with most any single-deployment mid to high power rocket. The Chute Tamerô control certainly accomplishes this goal allowing racketeers to achieve higher altitudes than they otherwise could. The Chute Tamerô control's many features have other benefits that help protect and recover the rocket safely.

No E-Match Required:††The Chute Tamerô control provides delayed parachute deployment without the use of an ematch or any explosive black powder charges (other than the rocket engine's built in ejection charge).

Anti-Zipper:††Because the parachute is bound during motor ejection, it presents a much smaller profile to the air stream than an open parachute would have. This means less zipper damage should the motor ejection happen too early or too late and when the rocket is traveling at a high velocity.

Parachute Dependability:††Because the parachute is tightly bound before and during motor ejection, it can not unfurl inside the rocket during flight. The bound parachute slides easily out of the rocket's airframe ensuring a successful parachute deployment and requiring less engine ejection charge.

Forget Delayed Deployment:††"Anti-Zipper" and "Parachute Dependability" alone is a good reason to use the Chute Tamerô control. Program the delay time to be equal to the engine's boost time plus its delay time plus a couple of seconds. With this time delay setting, your rocket's parachute will open at or near apogee more reliably and with less chance of zipper.

Easy Retrofit:††The Chute Tamerô control works with existing "single deploy" rockets with an inside body tube diameter of 2 inches or more. One Chute Tamerô control can be easily moved from rocket to rocket without modification.

Built-in Beeper:††The Chute Tamerô incorporates a loud built in tone generator to help locate your rocket in tall grass and corn fields. The tone generator also verifies heating element continuity (to know that your parachute will be released) and audible confirmation of the delay time setting.

Light Weight:††The Chute Tamerô control's light weight (145 grams, or 4.4 ounces with alkaline 9V battery installed) allows it to be used in most rockets using "F50" engine power and above with a minimal affect on altitude (about a 150 foot reduction).

Impact and Heat Resistant Enclosure:††This tough ABS enclosure is flame retardant and has survived rigorous testing. Do not be surprised if Chute Tamerô is the only part to survive your next motor CATO!

Easy Delay Calculation:††Start with the engine's boost/thrust time (about 2 seconds); add the engine's delay time (depends on the delay grain being used); and add the desired tumble time (start with 2 seconds and work your way up). That's all there is to it! For more detailed estimation of the tumble time there are two easy to use worksheets with all the necessary calculations provided. Use these convenient worksheets to keep a printed record of delay times used for each rocket and motor combination. This ensures quick, reliable, and hassle-free delay time programming at your next launch.

Easy Setup:††The Chute Tamerô control functions are all accessible from the outside of the unit. The only reason to open the Chute Tamerô control is to replace the standard 9V battery:

  • Secure Attachment Point:††High strength nylon strap and D-ring ensure that the Chute Tamerô control stays with the rocket. Connect it securely to your rocket's existing shock cord or directly to the nose cone eye bolt.
  • On-Off Switch:††Easily accessible during pre-flight check or at the launch pad. Remembers the most recently programmed delay time, even when turned off or after battery replacement. Switch is strategically placed between the nylon strap and the heating element to protect it during operation.
  • Delay Time Programming:††Set the delay time appropriate for any rocket/engine combination from the outside of the enclosure. Once the time is set and the Chute Tamerô control is operational, the delay time can not be changed until the Chute Tamerô control is again turned off.
  • Heating Element Replacement:††New heating elements just snap into the correct position to ensure proper positioning and tying of the parachute. The heating element is encased inside of a modular plug to protect it from damage and to shield it (and you) during heating operation.

And of Course, Lower the Risk of Loosing Rockets:††The parachute is ejected from the rocket's body tube, but it is prevented from opening at apogee because it is bound to the Chute Tamerô control until the pre-programmed time expires. This greatly reduces the effects of higher winds aloft and prevents a long walk, or a lost rocket.



Chute Tamerô Products - What is Included

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All Chute Tamerô Control Units Include:


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All Chute Tamerô Heating Element Packages Include:


FAQ - Frequently Asked Questions

  • Does the Chute Tamerô control require the use of additional black powder charges? No, the Chute Tamerô control uses only the engine's black powder ejection charge to eject the bound parachute out of the rocket's body tube. No additional black powder charges are required. The main parachute is released by heating and melting the fishing line used to bind the parachute. This means that the Chute Tamerô control can be armed and tested without an explosion safety concern. It also means that the Chute Tamerô control does not require expensive and hard to get ematches.
  • Does the Chute Tamerô control require the use of ematches? No, the Chute Tamerô control does not use ematches. When the programmed time expires, the electronics send electric current though a small reach of nichrome wire which heats and melts a monofilament fishing line.
  • How is the Chute Tamerô control different from Aerotech's Electronic Forward Closure (EFC)? The Chute Tamerô control is a completely different device, for a completely different purpose than Aerotech's Electronic Forward Closure (EFC). The confusion occurs because both devices use an internal PerfectFlite electronic timer, a G-switch, and a heating element (in the case of the EFC, it is a glow plug). In operation, the EFC allows the user to program the desired delay between launch and ejection charge. The EFC requires a black powder charge. The Chute Tamerô control allows the user to control parachute deployment.
  • What is the smallest rocket that the Chute Tamerô control has flown in? I have flown the Chute Tamerô control in an Apogee Stonebreaker. This a great 2 inch diameter rocket design with a 24mm motor mount and stable flight characteristics. The Stonebreaker is 28 inches in height with a 2.2 inch diameter body tube and weighs about 11 ounces with the Chute Tamerô control and an empty engine casing. While Stonebreaker can be flown with black powder engines such as C11 and D12, the added weight of the Chute Tamerô control requires a minimum average thrust of 17 newtons. I have flown this rocket many times with composite engines such as an E18 (about 1,500 feet) and an F24 (about 2,000 feet). I like this rocket design so much that I scratch built an upscale version with a 38mm motor mount.
  • CT Components:

    1. Is the heating element dangerous? Not particularly, but the nichrome wire briefly heats to a very high temperature that would burn skin. For this reason the heating wire is located inside the body of the RJ45 plug. Still, it is a good idea not to be touching the open end of the heating element when the Chute Tamerô control is in operation.
    2. How durable is the Chute Tamerô control? At the 2007 NY Power launch in Geneseo NY I watched a rocket with the Chute Tamerô control come in ballistic. (The engine's ejection charge failed.) The rocket buried itself in a large field of tall grass. The owner found the buried rocket easily due to the Chute Tamerô control's siren. Two parts of that rocket were salvaged to be used again without repairs: the motor casing and the Chute Tamerô control. Newer versions of the Chute Tamerô control are made from an even stronger and flame retardant ABS material.
    3. Is it possible to design a Chute Tamerô control that is based on a barometric (altitude) sensor? Anything is possible, but the barometric sensors that I am familiar with are fragile and will not survive the blast of the ejection charge. For this reason, barometric altimeters are located in a separate sealed electronics bay specially designed to protect the sensor from all black powder charges used in dual deployment recovery. The timer-based Chute Tamerô control can be placed right into the body tube of single-deploy rockets allowing it to retrofit easily and without modification.
    4. Why is the cutter heating element disposable? The heating element's job is to reliably cut the fishing line and release the main parachute at the appropriate time. There is a trade-off between a heating element that can be used over and over and one that always gets hot enough to be reliable regardless of the temperature outside (at altitude) and for a reasonable range of battery strength. To ensure cutter reliability, the heating elements typically burn through when used.
    5. Does the cutter heating element ever last for more than one flight? Yes, the heating element may survive the heating process. If it does and the Chute Tamerô control verifies continuity, then it is safe to use this cutter a second time. However, if the heating element did not burn through, it is mandatory that the battery be replaced. This is especially true in cold weather.
    6. How long does a new 9V battery last? This depends on how long the typical launch sits on the launch pad in while turned on, or out in the field (siren on) before recovery. In general, the battery should last for several flights. Warm batteries provide more power than cold batteries. On very cold days, it is a good idea to keep the batteries for rocket electronics in your pocket white prepping the rocket.
    7. What kinds of batteries can be used? Only snap-connector style 9 volt batteries should be used. I have successfully test alkaline, NiCad, and lithium 9 volt batteries. Any of these should work well in the Chute Tamerô control.
    8. Does one kind of battery work better? The main difference between alkaline, NiCad, and lithium 9 volt batteries is there weight. The heaviest and most inexpensive alkaline batteries weigh in between 46 and 47 grams. The lightest battery is the lithium at just over 33 grams (nearly one third lighter). Finally, the medium weight rechargeable NiCad battery weighs in at about 41 grams.
    9. I lost my lid screw, what kind of replacement screw do I need? Because the lid slides securely onto the body of the enclosure, the lid screw is only an added precaution. The lid screw is a Phillips flat head machine screw with a 4-40 thread and a 5/16 inch length (about 0.31 inches). The Chute Tamerô control should not be flown without the enclosure lid slide completely into place.
    10. Is the PerfectFlite timer modified for use in the Chute Tamerô control? The timer electronics in the Chute Tamerô control are unmodified. This timer was selected for its superior quality, reliability, light weight, and small size. It is a PrefectFlite MT3G MiniTimer3 with an integrated G-switch. The PCB standoffs used to mount the timer are not the same dimensions as those sold with the timer.
  • CT Operation:

    1. How does the Chute Tamerô control detect launch? The Chute Tamerô control has an integrated G-switch that detects the acceleration associated with rocket engine ignition and launch. To prevent unwanted detection (false positive launch detection), the PerfectFlite timer has a built-in de-bounce algorithm. This algorithm requires that a minimum of 2 G's of acceleration must be detected for 0.5 seconds or longer.
    2. How tight should the nose cone be? When using the Chute Tamerô control, the rocket's nose cone should pass the "shake test". The "shake test" involves turning the prepared rocket (CT and parachute loaded) upside-down and shaking it gently to see if the weight of the recovery devices will separate the nose cone. (The nose cone should remain attached during this test.) The reason that this is important is that during flight, when the thrust of the rocket engine suddenly stops and the rocket begins its long coasting deceleration to apogee, the contents of the rocket will push upwards into the nose cone. If the nose cone separates easily, then this upwards force will lift the nose cone off the body tube causing the rocket to separate prematurely. The added weight of the Chute Tamerô control will increase this upward force on the nose cone at the point of engine burnout.
    3. Is the Chute Tamerô control compatible with Aerotech Warp9 propellant? No. While I have not tested this combination, I know that Warp9 engines burn for only 0.25 seconds or so which is not enough time to trigger the G-switch/de-bounce mechanism integrated into the Chute Tamerô control.
    4. What happens if the main parachute is not released? In the unlikely event that the main parachute is not released, the rocket will be tumbling (not ballistic) to the ground. Remember that the motor's ejection charge opened and de-stabilized the rocket at apogee. If a drogue parachute was used, then the rocket will come down under the drogue.
    5. What is the main cause of the main parachute not being released? The most likely cause of heating element failure is a bad battery. Please use a new battery or check it before flight.
    6. Can I use more than one Chute Tamerô control in my rocket? Yes! The only limitation would be the added weight (4 ounces each with 9V battery). Using the 5-1 weight to average thrust safety guideline, each Chute Tamerô control would add an additional 6.3 newtons of average thrust required for a safe launch. A two pound rocket with a 29mm motor mount requires over 50 average newtons for a safe launch (F52 engine). This same 2 pound rocket with the Chute Tamerô control installed will require over 56 average newtons (F62 or G64 engine). For each additional Chute Tamerô control used, an additional 6.3 newtons of average engine thrust is required for a safe launch.

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