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luckymacy(at)comcast.net
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 Posted: Thu Jan 05, 2006 5:54 am Post subject: RV-8 wheel landings |
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So what are some safe ideas on moving the CG rear for first flights?
For example, if I wanted add 25 pounds to the rear baggage shelf and 50 pounds to the rear baggage floor, what are some safe ideas that won't hopefully lead to the ballast crashing through from the back and hurting me should I have an off field event.
Yeah, it's a generic question but folks who've been there know what I mean and that's who I'm targeting the question to. I'm interested more in actual solutions than future untried theories.
thx,
lucky
-------------- Original message --------------
From: Kevin Horton <khorton01(at)rogers.com>
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ronlee(at)pcisys.net
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| Posted: Thu Jan 05, 2006 6:54 am Post subject: RV-8 wheel landings |
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| Quote: | So what are some safe ideas on moving the CG rear for first flights?
For example, if I wanted add 25 pounds to the rear baggage shelf and 50
pounds to the rear baggage floor, what are some safe ideas that won't
hopefully lead to the ballast crashing through from the back and hurting
me should I have an off field event.
> For the first few flights, it may be wise to use some ballast to put
> the CG near the middle of the recommended range. After a few flights
> you can start adjusting the amount of ballast to slowly explore the
> forward and aft CGs.
>
> Kevin Horton RV-8 (finishing kit)
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From my non-aeronautical engineer view that would not be ideal. As Kevin
noted, near the middle CG range is likely to be safer.
Ron Lee
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wskimike(at)mchsi.com
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| Posted: Thu Jan 05, 2006 7:12 am Post subject: RV-8 wheel landings |
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My suggestion is to bolt a little weight in the tail section to get the CG
where you need it. You can add lead weights in the tail and remove them as
necessary. You won't have to add so much gross weight. That is the way the
real world does it.
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luckymacy(at)comcast.net
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ronlee(at)pcisys.net
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| Posted: Thu Jan 05, 2006 8:25 am Post subject: RV-8 wheel landings |
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Lucky, your original post talked about moving the CG "REAR" which
was interpreted as AFT. My reply was meant to urge caution which
was the intent of my post....safety.
Ron Lee
Do not archive
At 08:13 AM 1/5/2006, you wrote:
This is why I wanted folks who've been there, done that to respond 
75 pounds spread out that way in the back gives MY configuration a middle
CG AND that's wasn't really the main point of the quesiton anyway.
lucky
do not archive
-------------- Original message --------------
From: Ron Lee <ronlee(at)pcisys.net>
> >So what are some safe ideas on moving the CG rear for first flights?
> >
> >For example, if I wanted add 25 pounds to the rear baggage shelf and 50
> >pounds to the rear baggage floor, what are some safe ideas that won't
> >hopefully lead to the ballast crashing through from the back and hurting
> >me should I have an off field event.
> >
> > > For the first few flights, it may be wise to use some ballast to put
> > > the CG near the middle of the recommended range. After a few flights
> > > you can start adjusting the amount of ballast to slowly explore the
> > > forward and aft CGs.
> > >
> > > Kevin Horton RV-8 (finishing kit)
> From my non-aeronautical engineer view that would not be ideal. As Kevin
> noted, near the middle CG range is likely to be safer.
>
> Ron Lee
>
>
This is why I wantedfolks who've been there, done that to respond
75 pounds spread out that way in the back gives MY configuration a middle
CG AND that's wasn't really the main point of the quesiton anyway.
lucky
do not archive
-------------- Original message --------------
From: Ron Lee ronlee(at)pcisys.net
-- RV-List message posted by: Ron Lee <RONLEE(at)PCISYS.NET>
So what are some safe ideas on moving the CG rear for first flights?
For example, if I wanted add 25 pounds to the rear baggage shelf and 50
pounds to the rear baggage floor, what are some safe ideas that won't
hopefully lead to the ballast crashing through from the back and hurting
me should I have an off field event.
For the first few flights, it may be wise to use some ballast to put
the CG near the middle of the recommended range. After a few flights
you can start adjusting the amount of ballast to slowly explore the
forward and aft CGs. <B
R>
Kevin Horton RV-8 (finishing kit)
From my non-aeronautical engineer view that would not be ideal. As Kevin
noted, near the middle CG range is likely to be safer.
Ron Lee
http://www.matronics.com/contribution
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rv8_flyer(at)yahoo.com
Guest
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| Posted: Thu Jan 05, 2006 10:48 am Post subject: RV-8 wheel landings |
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Lucky,
I made some tabs out of .040 AL that have a 1/2" hole on one end and a #8 hole on the other about 1" long with a 45 deg bend between the holes. I attached these to the #8 screws that hold the baggage area in place. Then I can attach tie down straps to them to hold everything in place. For the first few flights I strapped 25 lbs in the back to get the CG to the mid point. Had no trouble three pointing. But I have an O-320 so even solo with nothing in back my CG is an inch back from the fwd limit. I have no problem with full stall three point landings, but wheel landings are so easy in the -8 that is what I do if there is a crowd watching.
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shempdowling2(at)earthlin
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| Posted: Thu Jan 05, 2006 12:27 pm Post subject: RV-8 wheel landings |
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I purchased 2 bags of 25 lb. lead shot at a gun store. They are nice to
have around when you're not giving them a ride.
Shemp/Jeff Dowling
RV-6A, N915JD
235 hours
Chicago/Louisville
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kboatright1(at)comcast.ne
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| Posted: Thu Jan 05, 2006 3:18 pm Post subject: RV-8 wheel landings |
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