REFLECTOR: Modeling Velocity dynamics
David Ullman
ullman at robustdecisions.com
Sun Nov 12 12:37:48 CST 2006
Ron Brown wrote and noted a flight simulator model. Has anyone modeled the
Velocity in the daVinci AirplanePDQ code and played with the aerodynamics?
Does anyone have the information to do such modeling (eg, weights, moments
of inertia, aerodynamic coefficients, airfoils etc)? I have an MS in
aircraft stability and control (i.e. enough knowledge to be dangerous) and
am very curious in the aerodynamic design of the Velocity since I am
building one.
Dr. David G. Ullman
Robust Decisions Inc
1655 NW Hillcrest Drive
Corvallis, Oregon, 97330 USA
Phone 541-758-5088
Direct Phone: 541-754-3609
FAX 866-898-1007
ullman at robustdecisions.com
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Sent: Sunday, November 12, 2006 10:00 AM
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Subject: Reflector Digest, Vol 30, Issue 31
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Today's Topics:
1. Door Lock (Chuck Jensen)
2. Re: Door Lock (Pat Shea)
3. Re: Door Lock (Chuck Jensen)
4. Re: Fw: Landing Technique (Tony Babb)
5. Velocity near Addison, TX? (PUSHERPILOT at wmconnect.com)
6. Re: Century 2000 Autopilot (Steve)
7. Prop Governor PCU5000X (Jorge Bujanda)
----------------------------------------------------------------------
Message: 1
Date: Sat, 11 Nov 2006 13:03:52 -0500
From: "Chuck Jensen" <cjensen at dts9000.com>
Subject: REFLECTOR: Door Lock
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Message-ID: <8984A39879F2F5418251CBEEC9C689B3286E3A at lucky.dts.local>
Content-Type: text/plain; charset="us-ascii"
Is the type/configuration of the door lock on the pilot side fairly
standard, at least for the ones that have a keyed lock? Mine is about
3/4" is diameter. I didn't know if this was something that Velocity
carried or if locks are just converted from other uses?
Chuck Jensen
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Message: 2
Date: Sat, 11 Nov 2006 12:52:17 -0800 (PST)
From: Pat Shea <xl340hp at yahoo.com>
Subject: Re: REFLECTOR: Door Lock
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <20061111205217.98011.qmail at web51913.mail.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Chuck,
I ordered a replacement from Velocity about a year
ago. Mine is recessed flush so I wanted the exact same
size. Cheap and painless...
Pat
--- Chuck Jensen <cjensen at dts9000.com> wrote:
> Is the type/configuration of the door lock on the
> pilot side fairly
> standard, at least for the ones that have a keyed
> lock? Mine is about
> 3/4" is diameter. I didn't know if this was
> something that Velocity
> carried or if locks are just converted from other
> uses?
>
> Chuck Jensen
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Message: 3
Date: Sat, 11 Nov 2006 16:05:09 -0500
From: "Chuck Jensen" <cjensen at dts9000.com>
Subject: Re: REFLECTOR: Door Lock
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Message-ID: <8984A39879F2F5418251CBEEC9C689B3286E3D at lucky.dts.local>
Content-Type: text/plain; charset="us-ascii"
That sounds like mine and I'll do the same.
Thanks
Chuck Jensen
-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Pat Shea
Sent: Saturday, November 11, 2006 3:52 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Door Lock
Chuck,
I ordered a replacement from Velocity about a year
ago. Mine is recessed flush so I wanted the exact same
size. Cheap and painless...
Pat
--- Chuck Jensen <cjensen at dts9000.com> wrote:
> Is the type/configuration of the door lock on the
> pilot side fairly
> standard, at least for the ones that have a keyed
> lock? Mine is about
> 3/4" is diameter. I didn't know if this was
> something that Velocity
> carried or if locks are just converted from other
> uses?
>
> Chuck Jensen
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Message: 4
Date: Sat, 11 Nov 2006 13:07:57 -0800
From: "Tony Babb" <tonybabb at alejandra.net>
Subject: Re: REFLECTOR: Fw: Landing Technique
To: "'Velocity Aircraft Owners and Builders list'"
<reflector at tvbf.org>
Message-ID: <00a301c705d5$792a59a0$6801a8c0 at TonyDV4170>
Content-Type: text/plain; charset="US-ASCII"
Ron,
I have FS 2002 also. Could you send me the files for a Velo model - or let
me know where they can be found.
Thanks,
Tony
SEFG 62% done, 78% to go
www.alejandra.net/velocity
-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Ron Brown
Sent: Saturday, November 11, 2006 6:15 AM
To: Velocity Aircraft Owners and Builders list
Subject: REFLECTOR: Fw: Landing Technique
Actually, after sending the note, I fired up FS2002 and lined up on 18R at
CLT, which is a 10,000 ft runway. The model does pretty good at lifting the
nose, and you can land and hold the nose off down to about 50 knots. But
again, this is not the same as real flying (but pretty good for
learning!!!).
----- Original Message -----
From: "Ron Brown" <romott at adelphia.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Saturday, November 11, 2006 8:05 AM
Subject: Re: REFLECTOR: Landing Technique
> Brian,
>
> I have been flying a Velocity XL in Microsoft Flight Simulator 2002.
>
> It flies reasonably well. I use it primarily for IFR practice. I
> have
> modified the panel to represent mine and use a joy stick.
>
> I don't think it will be a whole lot of help in trying to perfect the
> nose
> gear touch down techniques. But it is good practice for managing speeds
> in the pattern and final for those of you trying to step up from a
> Cessna/Cherokee. It was very helpful during my transition training.
>
> The model files are in Velov2.zip which happens to be stored on the
> TVBF
> files. http://www.tvbf.org/docs/ This model doesn't translate to the
> FS2004 program very well (no landing gear, etc).
>
> Ronnie
>
> ----- Original Message -----
> From: "michalk" <michalk at awpi.com>
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> Sent: Friday, November 10, 2006 10:05 AM
> Subject: Re: REFLECTOR: Landing Technique
>
>
> Does anyone have a flight simulator model for our CG/landing gear
> configuration?
>
> I seem to recall some flight simulator where one could plug in a model
> for a Velocity.
>
> Richard Affenit wrote:
>> As you make your approach you are reducing power. As you do that the
>> nose tends to fall and you land holding the nose up slightly with
>> elevator and when the mains hit - BAM. Try just a little bit of back
>> elevator trim before the mains hit and you can really control the
>> nose falling. Not too much trim however! Try a little at a time until
>> you get it right.
>>
>> Dick Affenit 732RA Gone but not forgotten.
>>
>> ----- Original Message -----
>> *From:* Craig and Denise Woolston <mailto:cdwoolston at sbcglobal.net>
>> *To:* 'Velocity Aircraft Owners and Builders list'
>> <mailto:reflector at tvbf.org>
>> *Sent:* Thursday, November 09, 2006 8:21 AM
>> *Subject:* REFLECTOR: Landing Technique
>>
>> Starting to get a few more landing under my belt and things are
>> getting a LOT smoother. One thing that I seem to be suffering from
>> is where I touch down smooth on the mains, hold the nose off, but
>> can't seem to lower it gently. The nose comes down and then bounces
>> back up. Any suggestions?
>>
>>
>>
>> Craig
>>
>> XL-5FG Flying in Palmdale, CA
>>
>>
>>
>>
>> ---------------------------------------------------------------------
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>>
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>>
>>
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>>
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>
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------------------------------
Message: 5
Date: Sat, 11 Nov 2006 17:58:50 EST
From: PUSHERPILOT at wmconnect.com
Subject: REFLECTOR: Velocity near Addison, TX?
To: reflector at tvbf.org
Message-ID: <c2a.57f4bdd.3287afaa at wmconnect.com>
Content-Type: text/plain; charset="us-ascii"
Is there anyone at Addison that would be willing to show their Velocity to a
couple of friends of mine?
Thanks,
Mel Bina
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Message: 6
Date: Sun, 12 Nov 2006 08:59:26 +0800
From: Steve <steve_beilby at yahoo.com.au>
Subject: Re: REFLECTOR: Century 2000 Autopilot
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <455671EE.2020703 at yahoo.com.au>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I have the same Auto Pilot. I think the Century has difficulty
overcoming the Velocity pitch trim arrangement (its very stiff).
I was thinking about changing the pitch servo geometry to give the
Century a bit more mechanical advantage.
This is all on hold whilst I replace the engine.
Steve
Sandy & Spike Duncan wrote:
> I am having a problem with my Century 2000 Autopilot with Trim
> Prompter in my XLRG. Other connected equipment includes Century HSI
> NSD360A, UPS Apollo/Garmin SL30 and Apollo ACU.
>
> The Century factory cannot find anything wrong in the Controller.
>
> The problem is shooting a coupled ILS approach. The coupler on the GS
> captures GS signal but will not stay on course. Sometimes it deviates
> low and sometimes high.
>
> All other modes of the autopilot are good. LOC track, ALT Hold, Pitch
> Modifier switches up/down all are good. All wiring has been checked
> correct with both Garmin and Century schematic diagrams.
>
> Does anyone have this installation and does it work OK?
>
> Do you have any suggestions on what the problem might be?
>
> Spike Duncan
> XL-RG
> IO-540 300 hp
> Almost 100 hours
>
>
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------------------------------
Message: 7
Date: Sun, 12 Nov 2006 04:27:30 -0800
From: "Jorge Bujanda" <bujanda at dslextreme.com>
Subject: REFLECTOR: Prop Governor PCU5000X
To: "Velocity Aircraft Owners and Builders" <reflector at tvbf.org>
Message-ID: <200611121227.kACCRaCr027488 at dax.awpi.com>
Content-Type: text/plain; charset="us-ascii"
Does anyone have experience or references about these governors?
http://pcu5000.com/index.htm
They list Velocities in their application charts for experimental aircraft.
Regards,
Jorge Bujanda
Velocity XL FG
Palmdale, CA
Website: http://members.dslextreme.com/users/jbujanda/
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