From: RicArgente@cs.com
Message-ID: <0.730aae75.256c3014@cs.com>
Date: Tue, 23 Nov 1999 12:59:48 EST
Subject: Spins
To: lancair.list@olsusa.com
Mime-Version: 1.0

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Silvio,

Here's a thread I saved a few months back from the rah forum regarding 
spinning the Lancair 320/360.  

Rick

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Subject: Lancair 360 MkI Aerobatics & Spins
Date: 1999/05/05
Author: Marco Lange <marhilNOSPAM@xs4all.nl>

 Hello people,
  
 a few weeks ago I posted a question about Lancair 360 aerobatics and spins, 
well I got a few answers (comments
 more likely) of people sayinf I was nuts of even thinking of doing spins in 
a Lancair 360. Well I just tried it and am
 still alive ... :-)
 I just want to share my experience with every one who wants to read it:
 I went up to 6000 feet AGL in our Lancair 360 MKI, empty wt 1127 lbs, about 
17 gal of fuel (100 lbs), myself flying
 the aircraft (220 lbs), so all up wt was about 1450-1500 lbs. The c/g was 
about 1.5 inches aft of the forward limit. I
 reduced to 100 kts (slow decell) then closed the throttle and pitched the 
nose up about 20 degrees, waited for the
 buffet and kicked in full left rudder and pulled the stick fully aft. It 
broke nicely to the left, made half a turn, it flattened
 out for half a turn and broke again over left to enter a spin (not a spiral 
dive) with nose about 60-75 degrees nose
 down, turn rate aprox 360 degr every 1-2 sec, and rate of descent aprox 
3000-4000 ft/min.
 Recovery was easy and quick, just opposite rudder and a bit of down elevator 
(past neutral), only resulting dive was
 pretty nose down (70 + degrees), pulling out of the dive has to be done 
carefully (not to snap out of it).
 Note: DO NOT TRY THIS AT HOME IF YOU DID NOT HAVE ANY SPIN TRAINING !!!  
 And remember that the fall down to mother Earth doesn't kill you, it's the 
sudden stop at the end that does !
 If you want to try this yourself, you have to keep in mind that a forward 
c/g will cause a poor spin (won't even stay in
 the spin) and a c/g too far aft is dangerous (flat spin can occur !), so 
remove all stuff from the back (good idea
 anyway when you start aerobatics and spins ...) and make a loadsheet just to 
see what the c/g is in the planned
 configuraion !
  
 Any more people out there who tried this ? (almost all Lancair here in the 
Netherlands were spun and none of them
 had any bad tendencies) 
  
 Marco Lange (co-owner of Lancair 360 #244 PH-MYF)


Subject:Lancair 360 MkI Aerobatics & Spins
Date:1999/05/06
Author: dave morss <mylastname@pacbell.net>

 I was one of the people that answered his post , he didn't understand my 
reply.  I said that in over 78 spins from one
 to three turns 90 % of them recovered normally but with any fuel in the 
wings the spin characteristics are
 unpredictable and using the same technique the results varied wildly and so 
spins are not recommended. and with
 wing fuel really not a good idea.
 also a level entry was one of the most predictable entry's but when snapping 
into a spin it got real interesting. Please
 if you read his post don't think you can spin your lancair and have it work 
out ok. this wing is sensitive to dirt and
 bug strikes wing fuel and cg location are all important..
 I did the initial spin testing on the lancair and i had a chute and modified 
the canopy so i could get out. I started at
 10000 ft and did spins for two days. When i started using my own lancair for 
air shows I again rigged the canopy to
 jettison and just using header fuel did several spin entries from  the 
places in my routine where i could get in trouble.
 I never let these spins develop but just wanted to see what to do in my 
plane if i got in a spin  entry accidentally.
 Lastly the spin changes after two turns and MY lancair didn't spin at all 
like the factory PROTOTYPE ,although the
 changes i made in building shouldn't have changed the spin characteristics 
much.
     In conclusion yes all lancairs will spin and if built exactly to plans 
with a clean wing and a cg in range no wing fuel
 and less than two turns they should recover most of the time in about half a 
turn. If you are going to do acro that
 could get you in a spin you should test your aircraft by going high 10000ft 
+ having a chute and rigging your canopy
 so you can get out in flight. Then you'll know the spin characteristics for 
YOUR plane on a given day temp density alt
 cg loading wing contour etc.
 dave

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