JePe JET 90 Fan Units

the good old times!

In the early days I was still a free man: designing and flying extremely lightweight & fast / stinky / noisy 3,5cc methanol powered warbirds like the Spitfire and P-51 and FW-190.  In 1995 Jets came into our interest, Wally and I made our own 100mm ducted fans with the small OS-rotary engines and some Kress-Fan parts to power a superlight F-16 body. Than one night in 1996 at 23:30  Dick vd Vecht called me awake..'I just phoned to the US and I can get hold of super strong electric motors, they are called Aveox 1409/2Y and they are Brushless!!' I asked brushless? what is the hell is that ??  (at that time we had only FAX but no Internet)
One hour later the deal was quickly done and I produced a superlight F-16 for Dick&Bert and got a Brushless?? Motor in return. Now I had a Brushless?? Motor and a F-16 but still no charger...Wally helped out with his Schulze charger for the weekend and we took of to Helchteren Jet Meet with 2 brushless F-16's and came home with first price! Than we all went down to 'Aspach'(in 1996 still a bit like an 'electric woodstock') Wally / Brothers vd Vecht and me (and a camping tent!). We simply bungee launched 2 brushless F-16's at the same time, flew pretty fast for 4:20 minutes and went home with first price again! (must have been first brushless motors on this show). At that time there was no internet so we kept going to more main events for promotion and mostly returned home with some new metal! Half a year later I even had my own Schulze charger!

One other big factor for success was Ulli Amacher from Switzerland who helped me in 1997 with 1 of his plywood Fan blades and 1 stator blade. At Aspach he said 'I am impressed with your carbonfibre construction work on the F-16, lets see what you can make with these blades'. Well these parts became the bases of our famous hand build carbonfibre Spiderfans, I build a few hundred of them and all that handwork cost me some thousands of hours of my life..I believe these 90mm fans were only 240 gram (inclusive 1000watt motor) but when Lipoly battery's arrived lightweight was not that important anymore..every fool could now fly electric Jets..So weight was not so important anymore and bigger choice of motors was there so we went more commercial with Nylon Fan parts and make complete Fan Units that are still almost half the weight as some 'Alloy' counterparts, also a well balanced glassfilled Nylon 90mm Fanrotor can hold 45.000 rpm (that's up to 4,5kgf thrust on a 90mm Fanunit)

our early Spider Fans

 

old Spiderfans: everything was hand build , even the motors came in loose parts

 horizontal calibrated test bench with small intake lip to measure real static thrust (not like the  misleading vertical 'anti-Hoovercrafts' that you see on Youtube)

 Torture of the WeMoTec rotors to match our 'narrow blade' high rpm applications of today

even spinners are balanced to get Worlds best dynamic balanced Fanunits !

 

 

Recent JET90-6s and JET90-8s Fan  Units

-JET 90 fans have all very high quality Bearings

-Permanent high temperature magnets (not the easy produced 2-pole that you find in most cheap motors)

-customized rotor / dynamic balancing / assembling al done by JePe (still 50-60 minutes working time for each fan unit!)

-2 years warranty
Jet 90-6s and JET90-8s are 100% drop-inn replacements for FlyFly / TopGun / Starmax Fans

  the new JET90-6s : superstrong magnets make turning of 5mm shaft with bear fingers impossible! Fan with plenty of 'Nano-Tech' headroom '

   we don't use cheap produced 2-pole magnetised  rotors, only rotors with separate magnets that are stronger and hold higher temperatures

technical data  JePe Jet 90-6s and JET 90-8s (90mm Fanunits)

Type static thrust current rpm weight
new JET 90-6s 2,8 kgf low timed (2,85-3,0 kgf at medium timing on NanoTech) 63A(low timing) 68A (medium timing) 36.000 328 gram
JET90-8s 3,4 kgf low timed on 25C battery (on Nano-Tech much more!) 69A(Low timing only!) 25C battery 40.000 365 gram

 

Caution!!

-check turning direction of fan only at low rpm or low voltage battery!

-never run in hand at full power! trust me and just build it into your plane: you have worlds best balanced Fan in your hands!

-never feel airflow on front side of fan (always feel behind Fan!)

-if Fans runs without airintake lip: wear ear protection for the extra noise (also airintakes can produce much noise in static position: once in air they switch to silence!)

-if fan is hold in hand for motor-direction test: hold Fan at stator position (not at rotor position but better do not run Fans in hand at all)

Never shorten Motor wires! always de-solder the plugs if you want to put on longer powercables (only the tip end of the wire can be soldered!) Never feel airflow on single duct opening (like Mig-15 / Mig-29 / F-86)) Depending on battery size it can eat you up completely! Always keep your building table free of parts if you run a powerful fan like this (this one exploded at 37.000rpm after it picked up a piece of textile from my test bench..)

 

 

Special big projects powered by JePe Fans!

My big 'vintage' Phantom was already powered in 2006 with 2x 90mm SpiderFans and 2x7s Kokam 3200 mAh cells all 14 cells had to be soldered at that time! The model was about 4,5 kg with Spring Air retracts. 'It flew on rails' and low current could make easy 7,5 minutes flights possible (in 2006!!)

I could find a small Video from Middle Wallop meet in GB (July 2006)
 

My modified F-4 with good old JePe A-10 on background..

short old 2006 movie

14 cells battery stock that you normally can find only in a WW-2 Submarine but not in a toy F-4...

    

 

Papykilowatt from Belgium can already do bigger:

his 2 meter span Meteor made with cnc hotwire foam cutter and is 'JePe style glass covered'. 2 of our new JET90-6s power this 6,5 kg beast, it fly's like a fast warbird !

Battery: 2x 6s Nano-Tech 6000 mAh each!...2 kg battery??  Hopla!!

   

according to Papy; it was build from idea to first flight in 2 weeks time!! that's what I call FastFoam..

  

(to be open and fair: Papy killed also some early 'green versions' of the JET90-6s on these big Nanotech 6000mAh packs..but new 'Black version' Fan is OK)

made with CNC hotwire foam cutter ,sanding +easy filler , than glassed with 25gram glass tissue +Epoxy and PU

 

 

Grad Kuipers from the Netherlands and his scratch build 3 meter span Antonov

Grad likes a lot of Flaps / a lot of wheels / and a lot of JePe 90mm Fans!!

 

click to fly onboard with the Antonov fantastic video!

Because this was his very first electric Model, Grad opened his battery's with a knife to see were all energy was coming from..both Grad and the Antonov survived and he learned a lot since.. On his second set of 2x 5000 mAh battery's this model now makes flights up to 9-10 minutes and takes off from grass with some 13 kg. Model is powered by our older type 8s Spiderfans but the use of only 6s reduced current of each Fan to about 32 Amps and so 2 Fans run on a single 5000mAh battery. Static thrust of each Fan is limited to 1,6 kgf
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He likes so much Flaps/Wheels and Fans that he now build another one: Galaxy C-5 !! it will be powered by new JET90-6s on half throttle these fans will do the same 1,6kgf at 30 Amps each, but at full throttle on take-off thrust will rise to 2,7 Kgf and 60 Amps for each Fan..that should do...time for a small 10kg RC-Tank as payload? or a crate of beer and a small electric coolbox on board?
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