Acro Image

Aerobatics Server

ACRO E-mail Archive Thread: [Acro] RE: HAMMERS REVISITED

[International Aerobatic Club] [Communications] [Aerobatics Images]

Disclaimer: These aerobatics pages are developed by individual IAC members and do not represent official IAC policy or opinion.

[Usage Statistics]

ACRO E-mail Archive Thread: [Acro] RE: HAMMERS REVISITED




Follow-Up To: ACRO Email list (for List Members only)

From: "Peter Ashwood-Smith"<petera at>

Date: Sat, 20 Apr 2002 04:41:06 UTC


Like hitting a golf ball or a really nice tennis serve... how do you explain
it to somebody else!

One piece of advice that cropped up from your post was the idea of watching
the point off your wingtip as it rotates around your cockpit to the other
side. I was not actually doing this but simply looking over the nose as it
rotated. Yesterday I tried a bunch where I followed the point all the way up
and over my head and down the other side. Worked much better and it's a
simple matter to adjust elevator to stop it from moving downward. If you
were really paranoid you could put a line of tape at the top of the canopy
where the point should pass overhead.

Its interesting that none of the tips that I found useful are in any the
acro books I have. Mike Goulians book is quite vague on the subject. 

Anyway by way of summary:

-	on the upline wait as long as possible before kick. Use aileron
feel, total aileron deflection and total rudder deflection and feel. When
they feel REALLY mushy or you run out of one control its time to kick. 

-	when kicking, keep the aileron in, watch the point on your wingtip
as it rotates over your head, use down elevator to keep that point from
moving out of the proper plane of rotation. 

This idea of watching the point as it rotates around is also FAR safer than
the 'put the stick in the corner' approach that I've heard described.
Obviously if you are watching that point and can keep it +/- the critical
AOA degrees from that line, you should not be able to spin off the top.

Really enjoyed this thread.



	-----Original Message-----
	From:	charles chadwick [SMTP:bubbaron at]
	Sent:	Friday, April 19, 2002 8:40 PM
	To:	iac list

	For all of you who offered me advice on my hammers, the results are
in. After several hundred of these "puppies" it appears my biggest problem
was not waiting long enough for the kick.  The B needs to get into the
buffet and I never really experienced that in the A.  There seems to be a
healthy bit of right aileron just before the kick.  I just kept doing them
slower and slower until at some point it felt  "very different"... SLOW,
then the kick and "holy cow Batman", a real hammer.  That "sweet spot"
someone mentioned, is now hopefully, firmly chiseled in my ass and I can
work on the next problem.  
	Thanks again for all the info.  
	"Grasshopper" done good.
	Ron Chadwick 
Attachement 1: part2.html


© Dr. Günther Eichhorn
Email Guenther Eichhorn