After one year of testing and good results in Asian races, the ATOM Vortex will come soon on worldwide market...

This new engine brand is based on GO engines.

The VORTEX is available for export now and the exhaust system EFRA2106 at the mid of november.

Engine details from ATOM :

Displacement :3.46cc
Bore :16.60mm
Stroke :16.0mm
Practical RPM :3500 ~ 40000 RPM
Power Output :2.58 hp / 35000 RPM
Weight :326 grams
Ports :3 Intake Ports
Construction Type :ABC

More informations after I have received the sample...

Base price??

Indeed, the relevant questions are "how much does it cost" and "where can I get one"?

Is there any confirmed differences between the Arrow GTR/Alturn/Scanner and ATOM besides the traditional turbo cut in the crank (other than cosmetic)?

Well I'm no expert, but straight off the bat I can tell you the Go crankcase, which is what this looks like, is a lot better than that cheapo picco knockoff they've used for the Alturn/Arrow..
Heatsink head looks like it's a low CG head like modern engines have.

Anyhow.. if it performs like an Arrow GTR in a better case, then I'd want one. I ran an Arrow GTR in a Ninja (xz-b style) case, and I was well pleased with that.

A technical update I received from ATOM :

"The ATOM Vortex V1's crankcase has the resemblence of GO Engines high-end engines however the internal channels are NOT from GO Engine. The airflow channels are casted from a new mould made by ATOM. This particular type of airflow channel design is made specifically for short-stroke engines only. This means V1's crankcase is NOT compatible with GO Engine or any other brands and the bearing specifications are not the same either. The mixture control valve has been re-modified to enhance airflow rate and stability. The cooling head is made to achieve low-center gravity and lightened as well. The heat distribution and dissipation abilities of this new cooling head is much greater than many competing brands. The conrod weighs less than 3 grams."

Looks like a nice engine...too bad no lightened and filled crankshaft like the 5RHO... I too am curious to see the price.

In Europe, I think the price will be approx $200 and $250 for the combo...

Two videos from Asia.

ATOM VORTEX + ATOM EFRA2106 on Prospeed Optima MX1

video 1
video 2

You can see the pics gallery of the sample I received in december here : ATOM Vortex

where can you get one from?

The sample I received come directly from ATOM because I know the sale manager.

Currently, this engine is available in Asia and in France in middle of february, I don't know if ATOM have a contact in USA.

This motor looks so sooo much like the O'Donnell SS .21 except the SS .21 had 16.45 by 16.45 bore and stroke. Carb everything except cooling head are very similiar. Not that it is bad cause I love my O'Donnell SS .21 so much that I have 2 of them.

Is there any coating on the crank?

Atom and Arrow looks the same.
Just some cosmetic changes. Wondering, what's the distributors of Arrow engine are thinking if the same thing hits the same country.

Just another Taiwanese / Chinese company way of doing business.