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Old Jun 12, 2001, 08:51 PM
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Haldor's Avatar
Stavanger, Norway
Joined Feb 2000
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Ryan Hellcat covering weight?

How much weight do the typical filmcovering add to this model?

Thanks,
Haldor
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Old Jun 13, 2001, 08:04 AM
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O'Fallon, MO, USA
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Haldor,

Not sure about the Hellcat but I do know the weight gain on my Bearcat was only in the 1 to 2 ounce range when I used Ultracote. My Bearcat weighs 18.5oz ready to fly.

Hope this helps.

Jeff

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Old Jun 13, 2001, 08:22 AM
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Stavanger, Norway
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The Bearcat is the same size so it applies
Thanks for the numbers Jeff - looks like I'll be fine then

Will cover it this weekend.
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Old Jun 13, 2001, 03:10 PM
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kevin's Avatar
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haldor,

i have a ryan bearcat that i covered with monokote. if i remember correctly, mine also gained just under 2 oz. after being covered. http://www.geocities.com/audiokev/electricpics.html
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Old Jun 13, 2001, 11:08 PM
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Stavanger, Norway
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Hey Kevin.

Good lookin' ship! I will see how it turns out.

Happy flying all!
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Old Jun 14, 2001, 12:00 AM
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SF Bay Area, California, USA
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I covered my zagi both sides with ultracoat and measured the weight gain with an electronic scale and ended up to be only a 1.8 ounce gain.
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Old Jun 15, 2001, 07:36 PM
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Haldor's Avatar
Stavanger, Norway
Joined Feb 2000
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Okay - its done

Covering added 1,2oz overall. Oracover was used. All Up Weight = 17,1oz with 7x500AR and the typical s400/6V , 6x4prop.
Hopefully I'll get it in the air this weekend.

Thanks for the help.
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Old Jun 16, 2001, 10:10 AM
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O'Fallon, MO, USA
Joined Jan 2001
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Quote:
Originally posted by Haldor:
Okay - its done

Covering added 1,2oz overall. Oracover was used. All Up Weight = 17,1oz with 7x500AR and the typical s400/6V , 6x4prop.
Hopefully I'll get it in the air this weekend.

Thanks for the help.
Haldor,

I'd go with 8 cells, if you can, the performance is much better and the weight gain to 18oz will not affect flight characteristics. Good luck witht the fist flight. You're gonna love this plane.

Jeff


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Old Jun 16, 2001, 07:54 PM
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Stavanger, Norway
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I will try 8cells when I bother to rearrange my 500AR packs I know the 7cell combo work well indeed as this isnt my first Ryan Hellcat. Never done one in film though.

The old one was 20oz BTW - 1/16" skin on the wings and HS81's + paint directly onto the wood made it that way. Still flew great though.

I do love this plane



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Old Jul 05, 2001, 09:55 PM
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Stavanger, Norway
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Finally flew the Hellcat tonite - weather was picture perfect and dead calm conditions. Put 3 flights on it just cruising around. The last flight was timed to 6mins (6:08s) which was great!

As I menioned I have had one before but it was 20oz RTF with the same powerpackage. The now lower weight really payed off in the slow speed handling dept. and reduced throttle usage hence the good duration. I'm gonna fly this puppy a lot more

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Old Jul 08, 2001, 09:30 PM
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Cincinnati, OH USA
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Having flown these planes with a variety of power packages, I've come to the conclusion that POWER loading is more of an issue than wing loading. With a brushless motor and 800AR cells, they still fly nicely and are easy to launch and land, even though the all up weight is 22 ounces or more.

But with a humble 6V S400 for power, you're a lot better off at 18 ounces. 19 is okay, but anything over that and performance really starts to suffer.

Jim
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Old Jul 08, 2001, 11:23 PM
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Stavanger, Norway
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So you say its okay to put either my Kontronik FUN400-23 or -28 with 8zapped CP1300's to use?

Seriously Jim I agree with you. Wingloading is only an issue if you havent the power to haul it around. I've learnt that from playing with my EDFs.

My current Hellcat (aka Pussycat ) is a very sweet flyer which I'll certainly enjoy more. I really liked the slowspeed handling which was missing in my first and heavier Hellcat. It flew very fine that one too but it needed to get up on step before it calmed down.

Pour on the watts and thanks for chiming in Jim!
-Haldor
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Old Jul 09, 2001, 09:34 AM
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[QUOTE]Originally posted by Haldor:
So you say its okay to put either my Kontronik FUN400-23 or -28 with 8zapped CP1300's to use?

Wellll, there IS a limit to how far you can take this....

Seriously Jim I agree with you. Wingloading is only an issue if you havent the power to haul it around. I've learnt that from playing with my EDFs.

That's a very good point, Haldor. The guys getting the best results with EDFs tend to be the guys flying planes with comparatively high wing loadings. Klaus Scharnhorst aptly described this approach by saying that you should use the smallest airframe that can accommodate the power system. This means that you end up with a plane that has minimum WEIGHT (high thrust to weight ratio) and low drag, but a rather high wing loading. Pylon racers illustrate the same approach.

My current Hellcat (aka Pussycat ) is a very sweet flyer which I'll certainly enjoy more. I really liked the slowspeed handling which was missing in my first and heavier Hellcat. It flew very fine that one too but it needed to get up on step before it calmed down.

This little Hellcat is surprisingly docile. It gives ample warning of a stall if you're paying any attention at all.

Jim
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Old Jul 09, 2001, 11:59 AM
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Stavanger, Norway
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Quote:
Originally posted by Jim Ryan:

That's a very good point, Haldor. The guys getting the best results with EDFs tend to be the guys flying planes with comparatively high wing loadings. Klaus Scharnhorst aptly described this approach by saying that you should use the smallest airframe that can accommodate the power system. This means that you end up with a plane that has minimum WEIGHT (high thrust to weight ratio) and low drag, but a rather high wing loading. Pylon racers illustrate the same approach.
That is exactly what I have in mind on my <a href="http://home.online.no/~hlonning/ebandit/ebandit.html">E-Bandit</a>

Happy flying all!
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