Intashu
Elite member
My father plans to do just this. Print'm at 140% scale for 70mm instead of 50mm... it should actually fly better as well!
Foamboard F-22 EDF
- Thread starter Grifflyer
- Start date
Grifflyer
WWII fanatic
Haha it’s been done before so give it a shot!!
Abdul Bari
Member
hehe change of plans: i m getting a 64mm edf plz what scale? i cant do cad coz i m only 13
Print off the plans at 128% for the correct scale.
Abdul Bari
Member
Oh tysm
Abdul Bari
Member
Also i m so dumb b/c 50mm edf = 100% scale so this is to anyone else also who is trying different scale of the plans: whatever size edf u have (in millimeters) x 2 = the % you need to print ur plans out as... power of math 😏
Abdul Bari
Member
@Grifflyer y don't u post this as a resource?
CrazyFastFlying
Elite member
Hey Grifflyer, this f-22 is OUTSTANDING! I can’t believe I missed the release. Great job! Once I get my hands on an edf, i’ll be building one.
Grifflyer
WWII fanatic
Hmm that’s really odd, hopefully it should still fly!
Don't worry too much Gryff. I projected this on the wall and traced it. then cut. BTW, the bottom looks perfect.
i started with the posterboard tube. first... not second....
if you are making one of these, don't do it at that way.
build the wing and core sections. put in the ducts... then layout the skin, top, then lower sections. and glue the down in sequence
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AussieBison
Well-known member
Hey Guys, EDF nube here.. Hoping you guys could give me some info on thrust side of EDF world.. how much thrust would be ideal for 500g / 1Kg AUW plane? I understand there may be more parameters than AUW of the plane, but a rough estimate would be helpful. Didn't bother too much about this thrust question for a prop plane as I almost always had equal or more thrust than AUW for prop planes.
Looking to start building this with 64mm (with scaling up a bit) if EDF thrust budget allows
Looking to start building this with 64mm (with scaling up a bit) if EDF thrust budget allows
Pieliker96
Elite member
Hey Guys, EDF nube here.. Hoping you guys could give me some info on thrust side of EDF world.. how much thrust would be ideal for 500g / 1Kg AUW plane? I understand there may be more parameters than AUW of the plane, but a rough estimate would be helpful. Didn't bother too much about this thrust question for a prop plane as I almost always had equal or more thrust than AUW for prop planes.
Looking to start building this with 64mm (with scaling up a bit) if EDF thrust budget allows
If hand-launching, aim for Thrust = Weight as acceleration to flight speed is key. If you're taking off from a runway, you can get away with pretty much anything as long as the runway is long enough and there's enough thrust to overcome aerodynamic drag and friction from the landing gear - I've flown EDFs with a TWR of around 0.6 off smooth surfaces with no problem, it just requires a pretty long ground roll.
AussieBison
Well-known member
Awesome, Thanks!! Does it strictly have to be 1TWR for hand launch, or could 0.8-0.9 work if thrown hard enough? 😂 only issue with landing gears is I’d be adding extra weight if I did that 😅
Pieliker96
Elite member
Around 1:1 should do the trick. The higher, the easier it will be.
AussieBison
Well-known member
Sure thing, thanks for the info
I might go with Grifflyer's L39 / Grunjet as a first EDF if they weigh a bit less / are easy to handle. Not sure if this amazing F22 is the right candidate for first EDF.Similar threads
