Discussion Scratch Built a Su-37

[alpea 41]

Mig I have this fan coming in a day or 2. I'll see if it's any good and let you know http://hobbycity.com/hobbycity/store...e_2.5inch_64mm My buddy picked a motor for it and I can't remember what it is.( I think it was the HXT 2835 3900 kv) But I'll find out and get some performance tests done and then I'll know what battery is enough.

[alpea 41]

This plane is going to use 64mm fans? or is it bigger and will use 70mm ? I just went back and you say it will be 90mm is that gonna be a twin 90mm. You're gonna need a big battery if it is.Or 2 batteries. Maybe you could scale it down to twin 64mm fans and equip it cheaper. I have this 89mm fan but it is heavy http://hobbycity.com/hobbycity/store...ink_Assembled_

[Mig29]

64 mm I think is to little.

90 mm mi dream but it will became to expensive.

70 mm Not to little not to big not that expensive

Since the start I was thinking 70mm or 90 mm???????
What size a 70 mm twin engine will reduce the amount of resources.


my wife as give me resources for all the jet needs servos engines for I think will be sufficient.


As a prototipe I will analise resources, with a 70 mm scale dawn the plane if the plane works as I desing maybe i will do the 90 mm


I will think to change from 90 mm to 70 mm

[Mig29]

Whats the best 70 mm system I can get, the least expensive I can get

[alpea 41]

I have never tried a 70mm so I can't say what's best. Someone will though

[Mig29]

I'm still working on the frame and other detail if I prefer 90 mm but the cost is a great point but when I finish the design I just scale dawn the Dwg so I'm not going to devate now I'm going forward on the design

I will limit my pictures I move to a new house and I still need MY DISH I need my dish and limited internet but I am working.

on the Su-30 MKI whats sticking out of the end of the jet I always wonder is anyone knows?

[alpea 41]

That's gotta be a electronic counter measure probe to foil radar and such.

[AlbatrosAce]

I think the fuel burn-off valves are there too

[alpea 41]

Got the 64mm fan it's 7 bladed and seems fairly good quality. A HET 2 W 20 motor fits it but I've had to order a 3.17 mm adaptor for the motor . Here's the fan with some reviews http://hobbycity.com/hobbycity/store...e_2.5inch_64mm. I'm gonna put it in a Free Wing F-15 from Hobby Lobby http://www.wattflyer.com/forums/show...25&postcount=2

[DanSavage]

Originally Posted by Mig29

on the Su-30 MKI whats sticking out of the end of the jet I always wonder is anyone knows?

It holds the braking parachute.

On the Su-32/Su-34, it houses the aft-facing radar.

[Low Pass]

Hey Mig 29,

a flight buddy has this 77mm EDF (http://www.hobbycity.com/hobbycity/s...idproduct=4239)
and a motor similar to that one: http://www.hobbycity.com/hobbycity/s...idproduct=7993
in his F-5. It is an awesome sound, just hissing air, no high pitch screaming. He spent some time on balancing it very well. It takes 50A at 4S.

Your bird seems to get big, too big for me. But I like your design so far. Have to replace my pusher Su-37 (w.retracts) one day with a real EDF redesign.
So I'm watching very interested.

[alpea 41]

I did a pusher outta the J Power Eurofighter much lighter and more manuverable than a twin 64mm EDF. This is my favorite picture of it http://www.wattflyer.com/forums/show...5&postcount=25