REFLECTOR: Update on 444DX

Thu Jun 7 18:58:31 CDT 2012

Good call 

jerry at jlbent.com wrote:

>Another thought would be to shorten the opposite leg.  That would put the
>holes above the stress point and should be about as strong as the original.
> It doesn't sound like you have any prop clearance concerns with so small a
>change.  Actually, I would think that the change needed by shortening would
>be a lot less than the increase due to the geometry.
>
>
>Jerry Brainard
>Jerry at JLBEnt.com
>
>
>  	-------Original Message-------
>From: Scott Derrick
>To: Velocity Aircraft Owners and Builders list
>Subject: Re: REFLECTOR: Update on 444DX
>Sent: Jun 07 '12 7:58am
>
>David,
>
>sounds like you are making great progress on your shakedown phase.  It
>really feels good when things start clicking.
>
>I'm not sure about your stall work and John's comment about deep stall.
>With a single pilot and not much fuel, and if your a light weight that
>speed doesn't seem unreasonable. I'm assuming you did a thorough W&B?
>There are characteristics to a deep stall entry that I can't remember
>off hand? Maybe somebody could chime in?
>
>Don't you just love autopilots!   They are the single pilots best friend!
>
>When remounting your main axle, I'd just clean the hole real well and
>fill with flox.If you have room a few layers of bid wouldn't hurt. I
>think the main stress within the axle flange area is side to side so
>fill it tightly, probably a good idea to clamp it real tight during cure
>to insure the flox is compressed as the inner core of the leg is during
>construction.
>
>Scott
>
>-------- Original Message --------
>Subject: REFLECTOR: Update on 444DX
>From: David Ullman <[LINK:
>http://mbox.jlbent.com/compose.php?to=ullman@robustdecisions.com]
>ullman at robustdecisions.com>
>To: [LINK: http://mbox.jlbent.com/compose.php?to=reflector@tvbf.org]
>reflector at tvbf.org
>Date: 06/06/2012 10:06 PM
>
>> I now have about 27 hours on 444DX.  Getting things sorted out.  I have
>been
>> to 10,500 ft and over 200kts (in a dive).  I have done both low and
>power-on
>> mushes.  I cant call them stalls as it doesn't.  Around 50 kts it just
>> mushes.  I still have roll and yaw control all the way down.  Overall the
>> plane is very easy to handle at any speed.  I hate the thought that this
>may
>> be due to the vortex generators.  I just cant intellectually get past the
>> fact that I have put vortex generators on a laminar flow surface.
>Anyway, a
>> very easy pane to fly.
>>
>> Playing with stalls today as I was trying to calibrate the Angle of
>Attack
>> sensor in the Dynon.  I couldn't get it to calibrate.  I need to check my
>> plumbing.  It compares the pressure on the AoA port with pitot and static
>> ports.  They are both working fine so I need to see if the AoA line in
>> clogged or ????
>>
>> Yesterday I turned on the Autopilot for the first time.  I went to 9,000
>and
>> tried altitude and the heading.  Both worked with the Dynon settings and
>I
>> was able to dial in heading and altitude changes.  Pretty cool.  I used
>it
>> again today.  Seems to work as I expected.  I have never flown a plane
>with
>> an autopilot before so my expectations were pretty ideal.
>>
>> My squawk list is getting shorter.  One that I need to do, is remount one
>> wheel.  I have fixed gear and the wheels were mounted at the factory.
>> Before I bought the kit the previous owner paid for some work to be done
>by
>> Velocity.  I didn't realize that I had a problem until after I had
>assembled
>> the plane for the first time in a hangar (not my garage).  I was working
>on
>> the rudders and realized that I could reach the top hinge on one side and
>> not the other.  It was a "what?" moment.  After measuring, one wing tip
>is a
>> good 2" lower than the other.  The only real problem is that I cant top
>off
>> the tanks as fuel will flow to the lower tank.  After careful measuring,
>I
>> need to raise one wheel by .6".  I am a little concerned about the extra
>> holes in the strut, but I suspect it is not a big deal.  I wish it had
>been
>> done right the first time.
>>
>> All-in-all I am really enjoying shaking out the issues and almost have a
>> machine that I can trust.  In July I will be doing some calibration
>> measurements and will report on the results of these tests.
>>
>> David Ullman
>> N444DX
>> President EAA 292
>> 541-754-3609
>> [LINK: http://mbox.jlbent.com/compose.php?to=david@davidullman.com]
>david at davidullman.com
>>
>>
>>
>>
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>
>--
>There is no fear in love; but perfect love casteth out fear.
>Bible, 1 John iv. 18.
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