# AeroTech Information Release 10/22/09

### Help Support The Rocketry Forum:

#### Garoq

##### Well-Known Member
AeroTech Information Release

10/22/09

AeroTech Unveils New E20W Model Rocket Motor at 2009 iHobby Expo

AeroTech Consumer Aerospace is introducing a new 24mm 'E'-class single-use model rocket motor in new retail packaging at the 2009 iHobby Expo trade show in Chicago, IL held during October 22 through 25.

The new E20W is the same physical size as a black powder 'D' motor at 24 X 70mm, but is only slightly heavier. It generates 36 newton-seconds (8.1 pound-seconds) of total impulse over a burn time of 1.7 seconds and with a peak thrust of 35.6 newtons (8.0 pounds). The E20W produces over twice the power of the black powder D12 and 1.3 times the power of the black powder E9, and fits in all kits designed for the D12 and E9.

The E20W features an all-new one piece molded phenolic casing with a built-in thrust ring, and ships with a FirstFire Jr.&#8482; 2-lead igniter which can be used with most popular model rocket launch controllers. It includes the same molded threaded bulkhead as the previously-released F32T. Delay times will be offered initially in 4 (P/N 62004) and 7 (P/N 62007) second variations.

The E20W uses a high-percent solids, high-performance version of AeroTech's White Lightning&#8482; Ammonium Perchlorate composite propellant in a "C-slot" grain configuration. During development testing, AeroTech measured a delivered propellant specific impulse (propellant propulsion efficiency rating) in the E20W as high as 233.4 seconds. Other specifications of the E20W include a loaded weight of 49 grams, propellant weight of 16.2 grams, fired weight of 27 grams, diameter of 0.938" (24mm) and a casing length of 2.75" (70mm).

#### MarkII

##### Well-Known Member
I'm with EGE; I have a much easier time buying 24mm E's than I do 29mm F's and G's (although I do like buying those too, whenever I can), so three cheers for the new AT E20! I keep adding more and more stuff to my fleet that will fly great on this motor! :wave:

But also add my name to the list requesting a 24mm Redline... Gary, we love your motors, your motor systems and your propellants, and we just keep coming up with more and more ways that we want to fly with them!

MarkII

Last edited:

#### MarkII

##### Well-Known Member
It's gratifying to know that SOMEONE out there wants to provide composite motors to mid-power fliers! Thank you!

MarkII

#### MarkH

##### ---
The F27 R has a pretty short flame. The flame on an 24mm redline might be hardly visibile, kind of like smaller blue thunder motors.

#### rokitflite

##### Well-Known Member
I think its great. Now, I can sell a pack of composite E's to a customer that has only experienced black powder motors for a reasonable price. The supporting flyers that Gary includes with them are clear, concise and help customers and retailers alike to learn about composites.

#### sam_midkiff

##### Well-Known Member
These are only $1.40 more (at retail) than 24mm reloadable Es. At$35 (retail, again) for the reload case, it will take 25 flights to recoup the case cost. On fields with any chance of losing the rocket, it removes reloads as an option, and certainly makes them much less attractive overall.

At the same time, at valuerockets.com E18-4W reloads are 3 for 25.19, and single use are 3 for \$18.90, which makes reloadable hardware even less attractive. Or am I (or my browser) just confused?

Sam