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dale1rv6(at)comcast.net
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 Posted: Thu Oct 04, 2007 2:48 pm Post subject: Cuban 8 practice questions |
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Hi all,
Since the list has been a little quiet hope you don't mind a question on
Cuban 8s. I have had training on loops and rolls, so I have just started
Cuban 8s. Would you look at my Youtube video of practice and give me some
input on how to improve them. I do know that the last part of my 2nd one was
a couple hundred feet below the entry altitude, I can work on that. I seem
to have a challenge with arriving level in the inverted position, but on the
1st one I got there OK, but you see the reference road was not in sight. How
did that happen?? For those who have not done aerobatics before, please get
proper instruction first, I did. Am just working on making them pretty. Hope
you enjoy the video,
Dale
RV6a Hartzell, O-360, 930 hours
http://www.youtube.com/watch?v=z2lRY1ZTMEM
Do not archive
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stein(at)steinair.com
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| Posted: Thu Oct 04, 2007 3:36 pm Post subject: Cuban 8 practice questions |
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Hi Dale,
The answer to me seems pretty simple. Your brain is sub-counsiously just
getting a bit ahead of you. You'll notice that at the top of the loop, your
"un-level" is already leading the same direction as you roll for the
backside of the loop. Force yourself to do 60% of the loop (and stay nice
and light in the belts) before you put in any sort of roll and I bet that
the inverted 'unlevel' will go away.
In my opinion, you're rolling out a little too early. For Cuban 8's, I try
to wait a bit longer on the downside, after establishing about a 45 on the
wingtip before I roll. I don't know if you have inverted fuel/oil or not, so
I may be speaking out of school here, but I'd try to float it over the top a
bit longer. You're entire maneuver is pretty tight. I think if you
loosened it up a bit and made it all a bit "bigger/slower" you might find it
comes together a bit better. Don't forget about the right/left rudder on the
way up/down through the loop to keep everything aligned (I'm sure you are,
but it helps). Also, on the way up a quick reference to the wingtips to
ensure you're not rolling on the way will help as well. A good set of
square reference roads will help you as you well know!
Overall you're on the way and it's looking pretty good. I'm by no means any
sort of expert or accomplished aerobatic pilot, but I often will do 2-4
cubans in a row when bored, followed by the same amount of hammerheads with
a half roll on the way down, then you just end up going back and
forth....kind of like with the cubans!
These RV's are amazing. Don't get too worried about altitude loss. After
awhile you'll find out that an RV can gain altitude during either a cuban,
loop or hammerhead!
Just my personal, un-professional 2 cents as usual.
Cheers,
Stein
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vhimsl(at)roadrunner.com
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| Posted: Thu Oct 04, 2007 8:32 pm Post subject: Cuban 8 practice questions |
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No suggestions, I just enjoyed the ride.
Thanks,
Vince H.
RV8 Finish
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pitts_pilot(at)bellsouth.
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| Posted: Thu Oct 04, 2007 9:16 pm Post subject: Cuban 8 practice questions |
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Dale, it's hard to tell from the video, but it appears that you're
rolling back upright early ...... while the nose is still moving down.
Try establishing a 45 degree down line inverted, pick your 'roll point'
and then roll upright and enter the second loop of the eight.
Hope this helps!
Linn
PS ...... I second your comment about getting instruction. When I built
my Pitts, I was too busy to get any akro training ...... and I couldn't
really afford it anyway. So I tought myself the basics with lots of
altitude. Now I can perform an egg-shaped loop perfectly ..... every
time!!!
do not archive
Dale Walter wrote:
| Quote: |
Hi all,
Since the list has been a little quiet hope you don't mind a question on
Cuban 8s. I have had training on loops and rolls, so I have just started
Cuban 8s. Would you look at my Youtube video of practice and give me some
input on how to improve them. I do know that the last part of my 2nd one was
a couple hundred feet below the entry altitude, I can work on that. I seem
to have a challenge with arriving level in the inverted position, but on the
1st one I got there OK, but you see the reference road was not in sight. How
did that happen?? For those who have not done aerobatics before, please get
proper instruction first, I did. Am just working on making them pretty. Hope
you enjoy the video,
Dale
RV6a Hartzell, O-360, 930 hours
http://www.youtube.com/watch?v=z2lRY1ZTMEM
Do not archive
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