600N Upgrade Engine Fan Comparison

Written by Tony Chaveiro Monday, 22 October 2007 00:00

Geforce SHO Fan

Physical characteristics

CNC machined, edges are chamfered and polished, has an outer rim to increase strength and durability. It has two inside pockets to hold most current magnets and an anodized finish. Its weight is 24.2gr Installation: This fan has reversed airfoil style type fins (12 to be exact to maximize engine cooling whereas its name (Super High Output). Balance was, once again, on spot and there was no noticeable run out. Once again, the slight vibration was present just like in all the other tested fans. Since this fan shares the dimensions and features of the HEv2 fan, you also need to readjust the governor sensor distance.

Flight report

In the following charts you may appreciate the engine performance during a set of tictocs, back flips and other acrobatics. As you may notice the temperature is quite low due to the high output that this fan is able to produce (the air flow is respectable, even at idle just like on the 3Dx fan). As you can appreciate on the RPM chart, the engine had some trouble keeping up with the added load and rpm losses are noticeable (between 2000 and 3000 rpm) which can be only be explained by the design of the fan itself. Just like the 3Dx, the fins shovel the air at high speed outwards which creates added resistance the engine has to bear with. The engine tuning required minor adjustments on the main needle (4-6 clicks leaner) to keep the temps up and no significant increase in mileage was noticed. Please be advised that this fan will, once again, change completely the way one is used to tune an engine. Temperature is a secondary factor being the main concern power and performance.

Pros

Nice quality finish, beefier than stock and performed as expected. No flex could be noticed and once the magnets are in it they’ll stay there. This is the fan that cools the most due to the increased number of fins. If you are a “cooling freak”, this fan won’t let you down

Cons

Magnet pockets could be 0.1mm deeper to make sure the magnets will flush perfectly with the surface using thicker adhesives. Just as with the HEv2 fan, a 1 mm hole in the pockets going thru the base of the fan so one can poke out the magnets if needed would be nice. Once they are in, there is no way to get them out without damaging the fan. Make sure your magnets have the correct polarity before installing them. A sensor distance readjustment over the stock fan is needed. Just as with the 3Dx fan, engine load is a factor to be taken account of and good collective management is a plus.