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Author Topic: Old Perky speed plane tip weight  (Read 1196 times)

Offline Jim Kraft

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Old Perky speed plane tip weight
« on: December 24, 2013, 02:35:15 PM »
Since I have never built a speed plane I thought I would ask you guys that know. I am finishing up a Black Hawk Perky and no where on the plans does it call for tip weight. Is that normal for speed planes? Should I add some? Thanks for any reply's as I have only built and flown stunt and one combat plane.
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Jim Kraft

Offline Paul Smith

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Re: Old Perky speed plane tip weight
« Reply #1 on: December 26, 2013, 02:38:28 PM »
The Perky has a very short wingspan, only 18".  So the outboard tip is only 9" outboard.  So you need A LOT more tip weight than a big stunter with a long wing.  I would put in a full ounce for starters and be perpared to remove some of possible.  If you start out light you  won't have a second chance.
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Paul Smith

Offline Jim Kraft

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Re: Old Perky speed plane tip weight
« Reply #2 on: December 26, 2013, 08:26:09 PM »
Thanks Paul; I will try an ounce to start with. I don't have a clue why there is no mention on the plans anywhere for tip weight. Thanks again.
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Jim Kraft

Offline Paul Smith

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Re: Old Perky speed plane tip weight
« Reply #3 on: December 27, 2013, 02:03:38 PM »
Perky speed leaves a lot to the imagination.

Remember, in the olden days there was a lot more clockwise flying, so torque was your friend.
Also, they didn't need or use the heavy lines we require today.
If you use a modern engine it will have lot more torque than Kania had.
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Paul Smith

Offline john e. holliday

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Re: Old Perky speed plane tip weight
« Reply #4 on: December 28, 2013, 09:17:18 AM »
Just remember to really lead the plane on take off like the better racing pilots do.  I have one ready to go as soon as I put the needle valve back in when I can find it.
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John E. "DOC" Holliday
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AMA 23530  Have fun as I have and I am still breaking a record.

Offline rustler

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Re: Old Perky speed plane tip weight
« Reply #5 on: December 28, 2013, 01:26:14 PM »
Quote from: john e. holliday on December 28, 2013, 09:17:18 AM
  I have one ready to go as soon as I put the needle valve back in when I can find it.

I can relate to that!!!! :(

I fly my Perky anticlockwise (conventional) on U-Reely with 18thou stranded lines. It has maybe 1/2oz. tip weight and takes off and handles the English wind quite o.k. A pleasant little model.
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Ian Russell.
[I can remember the schedule o.k., the problem is remembering what was the last manoeuvre I just flew!].

Offline Jim Kraft

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Re: Old Perky speed plane tip weight
« Reply #6 on: December 28, 2013, 05:36:03 PM »
Thanks for the replys guys. This one will have a Fox 15X slant plug in it, and if that does not work I also have a Fox 15 steel fin to go in it.
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Jim Kraft

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