Ultimate I

QCR Model #99


If you like helicopter rockets as much as I do, you’ve just walked into Heaven! QCR’s Ultimate family of rockets represents Ken Brown’s latest thinking on whirlybird design. The “Spinning Hub” idea used for these models improves on the simpler “Rotaroc” design, to arrive at a superior flying machine. In the “Rotaroc” design, the whole rocket rotates in the air while descending. However, in the Ultimate models, the rocket airframe is intended to stay still while the rotors spin.

As with most things in life, there is a price to pay for this quantum increase in performance. These models come with a skill level rating of 4. They are intended for experienced modelers only. In exchange for the increased building complexity, you will experience arrow-straight upward flights and seemingly unending recovery phases. These guys just hang up there! In truth, these rockets would be just as happy competing in the next NARAM as they would be flying in the nearby field next Sunday afternoon!

Ultimate I (13mm airframe) is the baby of the family, but it can show impressive duration times, thanks to its generous ratio of rotor area to body weight. Hang times of up to 60 seconds in calm conditions can be expected on a ½ A engine. Catch a thermal and this bird will stay up there ‘til the cows come home!

Additional Information

  • Length: 12-3/4″
  • Diameter: 0.544″
  • Weight: 0.5 oz.
  • Rotor: 1/16″ x 1″ x 9″
  • Recommended Motors:
    • 1/2A3-2T, A3-4T


Build History

  • 09/23/2008 – Purchased QCR Ultimate I from QCR for $14.00 (Retail – $14.00).
  • 09/24/2009 – Took pictures of package and opened package.
  • 09/25/2009 – Took pictures of components, scanned in plans and parts. Took measurements and recorded on page 104 of Model Rocket Notes Book #3.








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