[NSRCA-discussion] Snap (lesson learned)

[Nat Penton]

One other point: A snap is a high drag manuever, so a speed change should be 
evident.

----- Original Message ----- 
From: "Nat Penton" <natpenton at centurytel.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, July 04, 2006 11:00 AM
Subject: Re: [NSRCA-discussion] Snap (lesson learned)


> The fundamental question:
>       Is it a snap or is it a barrell roll .
>
> If the rate of rotation exceeds that which can normally be expected 
> ailerons
> only, it is a snap.
>
> It seems the only problem we have is in our existing instructions and
> manuever definition.
>
> ----- Original Message ----- 
> From: "Mike Hester" <kerlock at comcast.net>
> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> Sent: Tuesday, July 04, 2006 10:00 AM
> Subject: Re: [NSRCA-discussion] Snap (lesson learned)
>
>
>>
>>> 4. "Burying the Snap" by over controlling will eventually put you in a
>>> situation that will score poorly.
>>>
>>
>> And if it's a negative snap, as I found out the hard way, you may break
>> something loose.
>>
>> I had my plane snapping hard...and I mean HARD. I kept shaking my head,
>> but
>> everyone around me kept saying "NO don't tone it down, it looks awesome
>> and
>> you won't zero it, leave it alone!" LOL (It did always come out on 
>> heading
>> and wings level, it was just evil looking).
>>
>> So, I had a really good round going, and "went for it".....as in, went in
>> too fast, and buried the controls. I'll say this: there was no denying it
>> was a snap. But that loud "crack" could be heard in the next county. That
>> plane went from about 70 mph to oh.....3 or 4....LOL....almost instantly.
>> Like a 45 degree down warp speed blender. If some snaps have been checked
>> at
>> 14 Gs, this one was over 20. EASY.
>>
>> Needless to say it over rotated, and as I came out of it, I wondered what
>> was going to fall off. It felt wierd and the next couple manuevers went
>> fine. Then I dead sticked and had to abort the flight.
>>
>> Tank broke loose, cutting both lines and filling the nose of the plane
>> with
>> at LEAST 8 ounces of fuel. Nothing structural except a couple of very 
>> tiny
>> cracks in the canopy (love those carbon canopies!) So I drained my plane,
>> set it in the sun, put it all back together and flew the rest of the
>> rounds.....with a far more tame version of the snap.
>>
>> So, I learned my lesson. I'll satisfy the judges to an extent, and beyond
>> that, a snap is a snap and every judge should know what one looks like,
>> you
>> shouldn't have to break your plane to do it. Luckily all I lost was some
>> rubber bands and few ounces of fuel. At least I got more than a few jokes
>> about it =)
>>
>> -Mike
>>
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>>
>>
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