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Author Topic: John Barker's Hepcat  (Read 10343 times)
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crashcaley
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« Reply #175 on: February 08, 2020, 05:07:52 PM »

Tried glide testing my Hepcat.  It wanted to glide, but upon looking at the structure in actual sunlight, I found it wasn't put together quite right.  The wires holding the wing were not all of proper length.  Also had a few other problems.  So I am going to change the design, and call it the HepKitty.  I am changing the wire wing supports to a pylon, and also getting rid of the one blade prop, and just using a P-P 11 inch blade.  I will power it with a 10 gram motor, and hope it wants to fly.  I will use what Bill Dennis suggested before affixing the pylon, and that is to balance the model without the wing.  I'll post a picture after testing, to make sure it will even glide, in the "Show Your Newest Creations", so I don't pollute this thread on Hepcats
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What's stall speed?  Undecided
ffkiwi
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« Reply #176 on: July 11, 2022, 01:12:47 AM »

What are people using motor-wise now? weight? strandage etc. my wife's Hepcat is finally going to get its maidens at the forthcoming NZ South island Champs on 30/31 Jul....I need to get some motors prepared. When i originally built the model for her to fly at our Nats about 3 years back, it was as a backup to the KK senator which she preferred-and did use (beating me in the process I might add...!)-I would-had we flown it, have used a Senator motor-of 30g since I already had those made up-but it may not be optimal for the Hepcat...

  Anyway...thoughts...?     FWIW it weighs 66g without rubber....quite a bit heavier than John used to build them to-but that was deliberate on my part to accommodate less experienced handling by madam.....

 ChrisM
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vintagemike
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« Reply #177 on: July 11, 2022, 05:25:17 AM »

I used to use 25gram in 10 strands of 1/8" at similar weight to yours
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Bredehoft
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« Reply #178 on: July 11, 2022, 06:33:32 AM »

My 65g HepCat uses 12 strands of 1/8" about 36" long and goes up with authority when fully wound.  It is a very consistent model.

https://volareproducts.com/wordpress/wp-content/uploads/DeLoachPhoto1-1385x1536.jpg (DeLoach photo)

--george
John Barker's Hepcat
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RalphS
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« Reply #179 on: July 11, 2022, 06:54:20 AM »

What are people using motor-wise now? weight? strandage etc.

I used a 20g motor (actually two coupe motors) 8 strands of 1/8th, 60 pretension turns, wound to 1400 turns.  The model was not quite as light as John's but still performs nicely.  See https://outerzone.co.uk/plan_details.asp?ID=11014
Scroll down for pic of my model.  Nine and a half minutes and still only came second. 
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ffkiwi
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« Reply #180 on: July 11, 2022, 07:29:09 AM »

Thanks gents-will make up a few to those different specs and see how they perform

 ChrisM
 'ffkiwi'
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