Today's Message Index:
----------------------
1. 05:18 AM - Re: BRS balance issue (carl)
2. 06:29 AM - Chat Room Reminder (George Race)
3. 06:48 AM - Another BRS data point (george.mueller@aurora.org)
4. 08:35 AM - Re: BRS & CG (Zed Smith)
5. 09:06 AM - Re: CH701 Wing Leveler (Geoff Heap)
6. 11:07 AM - Re: Re: CH701 Wing Leveler (Les Goldner)
7. 08:33 PM - CH701 with Jabiru 2200 (Chuck Deiterich)
8. 09:18 PM - Re: CH701 with Jabiru 2200 (Graeme)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: BRS balance issue |
Enjoyed the discussion of CofG factors affecting the flying
characteristics of the 701. I suggest that one important factor was not
mentioned, the vertical position in the fuselage of the weight change.
A/C are usually weighed in the level flight position to measure the
CofG. Tipping the a/c away from the level position will result in a
different CofG position. In the 701 it will generally move forward
(stabilizing) if the vertical position of the added weight is low on the
fuselage and rearward (destabilizing) if high.
The position of a BRS chute if high in the fuselage would be
destabilizing and therefore flight testing for CofG should be approached
with due caution.
Another change that could be destabilizing is addition of larger fuel
tanks in the wings. These tend to be extended chordwise moving the CofG
rearward. Because of the high wing, when the angle of attack is
increased, the weight of the fuel and tank shifts rearwards, in addition
if the tanks are not full the fuel flows to the back of the tank giving
a double whammy to the CofG. This factor is further accentuated in the
701 because it can achieve angles of attack well above 20' before stall.
I agree that the affect on the CofG of any changes should be carefully
measured on the ground and deviations from the norm corrected and assed
before start of flight testing.
One good rule is to fast taxi and try to rotate the nose to get a feel
for elevator response before going airborne. During flight testing I
always make sure I get a good positive increase in stick back pressure
with decreasing speed right up to the wing stall. Any levelling of back
pressure before the stall is a danger signal that the CofG is too far
back.
30 hrs this summer, trying for 40 before freez-up.
Carl
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Chat Room Reminder |
Please join us for our Monday evening chat room starting around 8:00 PM
Eastern Time.
<blocked::blocked::blocked::blocked::http://www.mykitairplane.com/chat/>
http://www.mykitairplane.com/chat/
George
CH-701 - N73EX - IT FLYS!
Do Not Archive
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Another BRS data point |
Regarding the discussions about the BRS, I have a 701 with the skyshops
FWF kit and a Rotax 912ul. I installed the BRS per the BRS drawing on the
rear wall of the baggage compartment. My GC came out more aft than
forward (I think around 400), but within limits, and the airplane flys
fine. I also have "X" bracing in the fuselage.
One consideration I had about the BRS is what would happen in a "normal"
crash, would the g forces cause the BRS to hit me in the head? I put
heavy cargo netting in the baggage compartment to contain the BRS. Les's
installation on the back wall of the baggage compartment would be an even
better solution to this problem, however you must be more careful about an
aft CG problem putting the BRS further back.
George in Milwaukee
N701GM 49 hours flying
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
George,
You say your CG was more toward aft, but within limits.
I'm wondering if you happened to do another set of weighings with a person (or
sandbags) in the pilot seat?
This probably would move the "in flight" CG fwd a bit, but still within limits.
Might be interesting to see, if you still have the scales available.
Regards,
Zed
701/R912/90%/several years/etc
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: CH701 Wing Leveler |
Les/Kieth
With your knowledge of the install. How difficult would this be as a retro fit
as opposed to a original install? I'm not finished yet and could do it now or start
flying first. do you recall the cost? thanks.... Geoff
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 6758#206758
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: CH701 Wing Leveler |
Geoff,
Almost all wing levelers are retrofits. I have attached a picture of the
servo installation from Trio (EZ) so you can see how easy it is to install.
This pic shows two servos but for wing leveling you only need the gray one.
It took me about 1/2 day to install (and I'm slow). The biggest part is
attaching the wires. I added a kill/set switch on my control stick.
Les
> -----Original Message-----
> From: owner-zenith701801-list-server@matronics.com
> [mailto:owner-zenith701801-list-server@matronics.com] On
> Behalf Of Geoff Heap
> Sent: Monday, September 29, 2008 9:05 AM
> To: zenith701801-list@matronics.com
> Subject: Zenith701801-List: Re: CH701 Wing Leveler
>
> --> <stol10@comcast.net>
>
> Les/Kieth
> With your knowledge of the install. How difficult would this
> be as a retro fit as opposed to a original install? I'm not
> finished yet and could do it now or start flying first. do
> you recall the cost? thanks.... Geoff
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 6758#206758
>
>
>
>
>
>
>
> Photoshare, and much much more:
>
>
>
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | CH701 with Jabiru 2200 |
The following statement was taken from "STOL Updates from Zenith
Aircraft Co." e-mail I received today:
"What made this CH 701 unique was the installed powerplant: a Jabiru
2200...."
It is not clear to me what is so unique, as I and others have been
flying our CH 701s behind a Jabiru 2200 since 2002.
In fact, you can see my CH 701 on ZAC's web site with the note it has a
2200.
Chuck D.
N701TX
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: CH701 with Jabiru 2200 |
English is a funny language they could have said differant.
But then again all Ch701s are unique as no two will probably be
identical ;-)
----- Original Message -----
From: Chuck Deiterich
To: zenith701801-list@matronics.com
Sent: Tuesday, September 30, 2008 1:29 PM
Subject: Zenith701801-List: CH701 with Jabiru 2200
The following statement was taken from "STOL Updates from Zenith
Aircraft Co." e-mail I received today:
"What made this CH 701 unique was the installed powerplant: a Jabiru
2200...."
It is not clear to me what is so unique, as I and others have been
flying our CH 701s behind a Jabiru 2200 since 2002.
In fact, you can see my CH 701 on ZAC's web site with the note it has
a 2200.
Chuck D.
N701TX
-------------------------------------------------------------------------
-----
Checked by AVG - http://www.avg.com
9/29/2008 7:25 PM
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|