The ultra light and ultra small Micro F4 jet comes as a kit and will take you 1 evening to complete. Included is a 40mm EDF and brushless inrunner motor. Just include your own ESC, 2.5g servos and receiver.
Why doesn't HobbyKing sell these are airframe only?
The 40mm setup is too heavy for this little jet - especially with an 18amp ESC and 500mah battery!
An airframe only kit would allow the customer to put on their desired EDF.
Wow! Many strong reviews. thanks to all. Found them too late after i ordered 2 to combat with. Sounds like the mate and i will just throw them at each other, like school paper planes. Blunt end first, might go better.
I realy wanna know what battery i should use. i tried the recommended 2s 500mA zippy 20c but that battery could not handle it and the voltage dropped so the esc quit. Then i tried a 2s 500mA nanotech but same here. should i use a lager battery that can handle the amps?
buyers of this model need to be careful a few people have totaled the plane on maiden launch and i was one of them with the included EDF it has bad torque roll as this EDF is powerful more powerful than this model needs
did this model mention anything about making a thrust tube? I bought this model originally from 2dogrc and the instructions stated it HAD to have a thrust tube on the EDF. Mine never flew either..... the motor in the edf from there was way UNDERpowered. I'm considering trying this one out
Paul my fuselage also had crease marks on the depron foam parts including my wing someone had bent it than bent it back into shape this shouldnt effect flight performance but it does effect the look of the model as now i cannot remove those marks oh well its a shame as for your fans i would ask around on a rc forum for someone with knowledge on EDF's and send yours away to get the impeller removed and balanced or u can try screwing a screw into the center of the impeller and that may just push the shaft out i done mine like this eventually the center of the impeller snapped there is another web site u can go to 2dogsrc and buy a replacement fan and impeller only as this is the same fan this is the only shop i know that sells the fan as a kit rather than ready to use EDF so u can simply swap over your motor to the new EDF fan housing and impeller once balanced also this little motor does run a little warm on 2S lipo but however it puts out over 150grams of thrust :o)
Thanks gazza. My fuselage is twisted and the internal formers are crushed. It is beyond repair. I think HK will replace it. Your advice on the EDF is helpful. I am hoping that a little work with fine sand paper will solve the problem, but if that fails I will do as you suggest. Thanks again.
mine arrived a few days ago no second packaging box was used BEWARE! u will still be charged for this box it seemed impossible to remove the impeller i ended up snapped the blade as there is no way of removing it my impeller was rubbing the casing and if u brake the impeller on removal there is no replacement and parts are not interchangeable with GWS 40mm EDF so also be aware of this other than a dodgy unbalanced EDF the kit looks good
Thanks for that. Very helpful. I also received mine a few days with the same problem. I will attempt to trim the blade without removing the impeller. A bigger problem is that the fuselage is badly crushed. Hoping HK will replace(???)
Same problems here, no external shipping box, impeller rubs on housing...but as for my crushed fuselage, additional items I had ordered were packed IN the F4-EDF box and had shifted and crushed it repeatedly in transport. Open replacement issue with HK, awaiting response.
Kit arrived yesterday. The fuse was "squeezed" by improper packing.I have to add additional bulkheads to get it back in shape. Some of the foam parts have marks on surface. Usage of a little higer shipping box may solve this problem. The impeller of the EDF rubs on the shroud and needs rework too.
Basicly a very good design, but quality have to be improoved.
Mine kit arrived today. So, what i can say now - nice looking small plane, packaging not so bad (each internal package fixed with some glue tape), but some things can be improved. First of all, HK, please, think about aligning of fuselage to another side of box - mine was aligned to rear side, but if you fix it near front. it will be more protected - with two layers of cardboard - box and cover. Other is OK.
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Kleiner lustiger flieger mit recht Starkem Impeller . Fliegt echt schon
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Prezzo accettabile per la qualit del modello
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I wonder, HK says you need 2 servo's (2,5 grams ).
You can also see that both servo's are going to the ailerons, but on the first photo you can see a elevator that should be work.
Why says HK that you need 2 servo's and not 3?
I am vermiliar with ailerons and elevator on 2 servo's like ailerons and alevator in one.