[NSRCA-discussion] 2007 Masters... clarify on Item20
Archie Stafford
rcpattern at comcast.net
Tue Aug 15 06:35:59 AKDT 2006
I think this is another situation of over analyzing. Maneuver starts when
the first roll is initiated and stops when it is finished. There has to be
a straight line between maneuvers, but the actual maneuver itself starts
with the roll. In the current Masters sequence, the slow roll follows the
figure 9, therefore the straight line is rather short if you do a nice long
slow roll. However, most Masters pilots are doing the Humpty bump that
follows by pushing the box, pulling up, half roll then pushing over the top
back into the box. The line before the slow roll is MUCH shorter than the
line afterwards, however the center of the maneuver is the inverted point of
the slow roll. The easy way to do this is judge the center of the maneuver
from the time the first roll starts til the last one finishes, then ensure
there is a straight line before and after. There is no judge out there who
can determine if the straight line was 10 meters or 15 meters.our eyes just
aren't that good. But our eyes can see a straight line.
Arch
_____
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Don Ramsey
Sent: Tuesday, August 15, 2006 10:11 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
Derek,
You have the wording on your side in one area. I agree about the 15 meters
being the accepted standard. Consider this intrepretation, for the maneuver
there must be a definite entry/exit line and for centering there must be a
line but let it approach 0 meters length. It seems if there is a line on
both ends its length makes no difference for centering purposes.
In your interpretation:
- if a entry/exit line is not present on a centered maneuver it must be
downgraded for centering.
- in the case of no entry line the maneuver is downgraded twice for the same
error. Once for centering and 2 points for no entry line. I don't think
that is correct.
- no exit line would be downgraded for centering unless the maneuver is
offset in the maneuvering portion. In this case I don't think the judge
would ever get it correct.
- this really seems to open a can of worms that would cause many
inconsistencies between judges.
dr
----- Original Message -----
From: Derek <mailto:derekkoopowitz at gmail.com> Koopowitz
To: 'NSRCA Mailing List' <mailto:nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, August 15, 2006 8:39 AM
Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
True.... the rules never state that entry and exit lines should be a minimum
of 15 meters - that is why I stated "generally accepted" since everywhere
else it states that a 15 meter line should be present before the 1st
maneuver and so on... to me a 15 meter line is nothing (extremely short)
when a plane is flying at 60 mph (or faster) - but we need to include a
defined length as part of each maneuver - and they should be equal lengths
in order for the maneuver to be deemed "symmetrical".
_____
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Don Ramsey
Sent: Tuesday, August 15, 2006 5:51 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
First, to be clear on the Masters 2/2 Slow Roll Opposite. Center is defined
only after the maneuver ends. Where did it start, where did it end and only
then, was the entire maneuver centered?
I'm currently gathering information for the next year's judging materials so
this discussion is great. Interesting points on entry and exit lines. The
rules are not clear. Consider this, the box entry must be called 15 meters
before the first maneuver begins. Each maneuver begins and ends with a
straight line. Here's the quotes from the rules:
Calling of box entry must be done so there is a minimum of a 15 meter
straight line before the first maneuver. Judging of the maneuver will begin
then. (As the lines into and out of maneuvers are part of the maneuver and
are always judged). Calling of exiting the box must be done after a minimum
of a 15 meter straight line after the maneuver. Judging will cease at that
point.
Let's take that a little further. It seems to say, since a line is part of
the first maneuver in a sequence then calling the box entry should be done
30 meters before maneuvering starts. I don't think that was the intent of
the rule.
and more on lines:
Lines-All aerobatic maneuvers are started and ended by a horizontal line.
When no line is flown between two (2) scored maneuvers, the upcoming
maneuver should be downgraded by two (2) points.
All lines within a maneuver have a beginning and end which define
their length. The length of a line should only be graded when a maneuver
contains several lines with a given relationship, as in a square loop.
I don't think entry/exit lines have a beginning and end which define their
lengths and if they don't they should not be used for centering
determination. Since the entry and exit lines to a maneuver can and are
often different lengths that would imply those centered maneuvers where they
are different should be downgraded. A good example would be a turnaround of
a half cuban eight, a centered maneuver then a stall turn for the other
turnaround. Should the centered maneuver be downgraded in this case since
the entry and exit lines are of different lengths? Also, the maneuver
descriptions never say, "Model draws a horizontal line, (remainder of
description) ...." The rules never say the entry and exit lines must be 15
meters only that they must be there. The implication is, entry/exit lines
should not be used in determining centering.
Must there be 30 meters between maneuvers? I disagree with Derek here.
Here are the rules on lines.
"(As the lines into and out of maneuvers are part of the maneuver and are
always judged)."
then later
"The judge should form an image of the forthcoming maneuver based on using
the straight and level entry identified in section D, Judging Individual
Maneuvers, as a reference. The absence of a definite entry into a maneuver
increases the difficulty of judging its precision and competitors will
recognize this as justification for downgrading. The straight and level exit
from a maneuver is one of the more valuable portions of a maneuver in
evaluating how well the intended course of the maneuver was followed.
Therefore, the absence of a well defined straight and level exit should also
result in downgrading. In all cases, straight and level flight means flight
parallel to the flightline, at a constant altitude, and with wings level."
Section D does not include any reference to entry/exit lines. It appears
there only need be a definite or well defined line into and out of
maneuvers. That length is not specified. There is also nothing to preclude
the exit line from one maneuver being the entry line into the next. Again,
the maneuver descriptions do not include the entry/exit lines in their text.
This needs to be corrected in the next rule cycle.
Sorry for the rambling,
Don
----- Original Message -----
From: "Derek Koopowitz" <derekkoopowitz at gmail.com>
To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, August 15, 2006 1:04 AM
Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
> Straight from the rule book on all counts. The 15 meter rule for straight
> line applies to entering and leaving the box as well. Refer to page 72.
>
> http://www.modelaircraft.org/compreg.asp
>
> Calling of box entry must be done so there is a minimum of a 15 meter
> straight line before the first maneuver. Judging of the maneuver will
begin
> then. (As the lines into and out of maneuvers are part of the maneuver and
> are always judged). Calling of exiting the box must be done after a
minimum
> of a 15 meter straight line after the maneuver. Judging will cease at that
> point.
>
> If there isn't a defined straight line between maneuvers then the upcoming
> maneuver is downgraded 2 points (see my comment below). The length of
that
> line should be 30+ meters in order to receive no downgrade.
>
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Fred Huber
> Sent: Monday, August 14, 2006 10:53 PM
> To: NSRCA Mailing List
> Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
>
> you didn't read the whole thing I posted.... Looks like you responded to
the
> part before "sorry"
>
> You have a 15 meter straight line definition... I'm not sure if thats from
> the rulebook or not... That would be appx 7 fuselage lengths.
>
> But.... does that just apply to the enter and leave box? or does there
have
> to be a 30 meter (or 2 X 15 meter segments with the un-judged corrections
> between them... there's not much room for track corrections this way)
> straight line between consecutive maneuvers? Or is the way I have
thought
> it was correct... no defined straight line lenght between maneuvers, just
a
> definite straight line established?
>
> ----- Original Message -----
> From: "Derek Koopowitz" <derekkoopowitz at gmail.com>
> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
> Sent: Monday, August 14, 2006 11:24 PM
> Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
>
>
>> Fred,
>>
>> If what you say is the case then every maneuver would be impossible to
>> judge
>> and that is why we have the the following:
>>
>> Page 72:
>>
>> Calling of box entry must be done so there is a minimum of a 15 meter
>> straight line before the first maneuver. Judging of the maneuver will
>> begin
>> then. (As the lines into and out of maneuvers are part of the maneuver
and
>> are always judged). Calling of exiting the box must be done after a
>> minimum
>> of a 15 meter straight line after the maneuver.
>>
>> Page 77:
>>
>> . Lines-All aerobatic maneuvers are started and ended by a horizontal
>> line.
>> When no line is flown
>> between two (2) scored maneuvers, the upcoming maneuver should be
>> downgraded
>> by two (2) points.
>>
>>
>> The generally accepted length of that line is 15 meters.
>>
>> So add 15 meters to the beginning of, and end of, each maneuver and you
>> can
>> figure out the center for those maneuvers that have different rolling
>> elements such as 2/2 point roll followed by an opposite slow roll.
>>
>>
>> ---Original Message-----
>> From: nsrca-discussion-bounces at lists.nsrca.org
>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Fred Huber
>> Sent: Monday, August 14, 2006 8:57 PM
>> To: nsrca-discussion at lists.nsrca.org
>> Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
>>
>> OK.. then its impossible to downgrade THIS maneuver for centering if the
>> straight lines are part of it.... Because there is no definite attitude
>> of
>> the model that can be associated with center, and the line start and end
>> can't be defined, since there's also straight line exit from the previous
>> maneuver and entry to the following.
>>
>> Sorry.
>>
>> Has to be start of rolling and end of rolling for centering reference and
>> assumed same length straight at each end. (which can be just one fuselage
>> length... maybe less since the length is not defined...)
>>
>> If you don't assume same length straight lines... you can't judge center
>> on
>> anything.... even a simple loop.
>>
>> You can purposely shoot for roll rates that center the inverted.... but
>> as
>> noted... a slow roll probably SHOULD be slower roll rate than the rate
for
>> the 2/2. which would be likely put put you somewhere in the slow roll
>> portion at center.
>>
>> ----- Original Message -----
>> From: "Derek Koopowitz" <derekkoopowitz at gmail.com>
>> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
>> Sent: Monday, August 14, 2006 10:10 PM
>> Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
>>
>>
>>> The entire maneuver is judged including the straight lines. Each
>>> maneuver
>>> as defined in our rules starts and ends with a straight line.
>>>
>>> -----Original Message-----
>>> From: nsrca-discussion-bounces at lists.nsrca.org
>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Earl
Haury
>>> Sent: Monday, August 14, 2006 7:55 PM
>>> To: NSRCA Mailing List
>>> Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
>>>
>>> Actually, while the straight line "before" and "after" the maneuver is
>>> required the names (of the lines) themselves define that they are not
>>> "included" in the maneuver. Rolls start when the aircraft begins to roll
>>> (for the first element) and end when it stops rolling (the final
>>> element).
>>>
>>> Earl
>>>
>>> ----- Original Message -----
>>> From: "Derek Koopowitz" <derekkoopowitz at gmail.com>
>>> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
>>> Sent: Monday, August 14, 2006 9:19 PM
>>> Subject: Re: [NSRCA-discussion] 2007 Masters... clarify on Item20
>>>
>>>
>>>> Not necessarily - since the maneuver is made up of two different
rolling
>>>> elements the center of the maneuver is the center of the two components
>>>> including the straight line before and after the maneuver. Since the
>>>> 2/2
>>>> point roll will be done a lot faster than the slow roll the maneuver
>>>> will
>>>> start early and the 2 point roll will finish long before center prior
to
>>>> the
>>>> slow roll beginning. What the pilot/judge needs to do is visualize
>>>> where
>>>> the maneuver starts including the straight flight portion and where it
>>>> will
>>>> end after the slow roll including the straight flight portion and
>>>> position
>>>> the maneuver accordingly.
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: nsrca-discussion-bounces at lists.nsrca.org
>>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of
>>>> jivey61 at bellsouth.net
>>>> Sent: Monday, August 14, 2006 5:18 PM
>>>> To: nsrca-discussion at lists.nsrca.org
>>>> Subject: [NSRCA-discussion] 2007 Masters... clarify on Item20
>>>>
>>>> I am directing this to Don Ramsey.
>>>> Where is the center of the 2/2pt roll,slow roll opposite. It seems it
>>>> would
>>>> be between the 2/2pt and the slow roll opposite.
>>>>
>>>> TIA
>>>>
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>>>
>>>
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