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Foamies Talk about building, power setups and anything having to do with e-powered foamy planes!

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Old 06-20-2013, 02:27 PM   #1
drummaker
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Default Hawk Sky with pusher prop

Hi folks
I just wanted to announce that I have installed a Fold UP pusher on my Hawk Sky. I was unable to find anyone on the net that was talking about having done this, so I thought I would post so anyone wondering how to do this and IF it works well would know.

I used 6X4 blades. I had to clip about 1/4 inch off of the blades to keep them from hitting the Fuselage. I had to turn them around to face the front of the plane. Note that I had done the microjet upgrade already so this is a 3.2 MM shaft, and the spinner fit just fine. I also trimmed down the plywood firewall adapter that came with the microjet to reduce drag there.

There is a tendency on Fold UP pushers to go over center and not want to start back up without shaking the hell out of the plane when they are not moded.
I used a piece of light ply long enough to go from blade base to blade base with a hole centered to prevent this. The blades can't go farther than straight back.

Anyway. the results?

The Hawk sky now glides beautifully. I really haven't flown a REAL glider, but I can tell you that I did catch a mild thermal yesterday and I was able to fly the Halk Sky for nearly 30 minutes with no running of the motor.

That said... the power produced by this prop is not nearly as much as the Fixed APC that came with the Microjet upgrade, so the Fun factor of Really fast flight is gone. BUT the thing would go nearly vertical when gaining altitude . The real issue was not thrust but speed.

Any way I am tickled pink, and I strongly recommend doing this. I have been thinking of building a Glider Kit which I will eventually do..

BUT

I can now just build a 3D plane and skip the Glider for now.



Happy Flying
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Old 06-20-2013, 07:53 PM   #2
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Hey drummaker after you get a couple builds under your belt i have tiled plans of this power glider from the German forums. Its balsa inside frame with a foam skin . Just pm me any time for them. joe http://www.youtube.com/watch?v=v8EBs...ature=youtu.be
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Old 06-20-2013, 09:15 PM   #3
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30 min in a thermal with no motor running... You HAVE flown a glider.
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Old 06-20-2013, 09:22 PM   #4
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Originally Posted by fhhuber View Post
30 min in a thermal with no motor running... You HAVE flown a glider.
I got over a hour on a buzzard bombshell one day with the nitro motor off . I was letting kids behind the safty fence fly it but would have to make it come down after a while . I finaly brought it down a bit and put rudder trim on it to do a slow circle and turned the tranmitter off to save my batterys. Best thermals i had ever flown in. joe
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Old 06-21-2013, 01:33 AM   #5
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I did 2.5 hrs with a Gentle Lady in ridge lift. I had to land because the TX power meter (Futaba FG) was starting to go down.

Fun stuff.
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Old 06-21-2013, 01:48 AM   #6
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Any way I am tickled pink, and I strongly recommend doing this. I have been thinking of building a Glider Kit which I will eventually do..

BUT

I can now just build a 3D plane and skip the Glider for now.



Happy Flying[/QUOTE]

Yup
Back in the mid 1980's I had a number of 2 hour flights with an electrified Craftaire 10 Foot wingspan Viking sailplane. Those were very good models back then.

DennyV
Retired and the days are just too short, busier than ever!
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Old 06-21-2013, 02:26 AM   #7
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You did come up with a nice solution for using a folding prop on a pusher.

Solves an issue I have with another model that likes to break the prop on landing.
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Old 09-21-2013, 05:28 AM   #8
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Sounds great. I hate to sound like a dolt, but could you post a pic here?

"Society comes to nothing without good plumbing."
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