REFLECTOR: Ignition Noise
Ronnie Brown
romott at roadrunner.com
Mon Jun 11 13:45:21 CDT 2007
The headsets are grounded at the PS4000 intercom and no where else (but I
will verify) The head set wiring is through the keel, EI is powered and
grounded through the right side duct. Power for the EI is in a shielded
wire and the shielded wire is grounded at the mag - by way of the panel.
Now that I think of it, the EI shield is grounded twice! Might need to lift
one end. Hmmm - thanks for the suggestions, Brian!
The EI is grounded on the SS firewall as well as to the engine (but not
using a braided wire - wonder if that would help?)
Ron
----- Original Message -----
From: "michalk" <michalk at awpi.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Monday, June 11, 2007 2:12 PM
Subject: Re: REFLECTOR: Ignition Noise
It's not a high frequency coupling.
I would guess that your antenna shield is a ground path for your EI.
Are your headset jacks insulated from the instrument panel? Or, do your
headset wires share a common ground with your EI?
Ron Brown wrote:
> Actually, I have been chasing a spark noise in my Garmin 430 for a
> several weeks. It is only coming in the 430, it goes away when I turn
> off the Jeff Rose Electroair electronic ignition, it changes frequency
> with engine RPM, it does not come in to the #2 com which is a lowly
> Microair 760, it does not make noise if the antenna is disconnected from
> the 430. Arrrggghhh!
>
> I have changed antennas from right to left, used a portable antenna,
> bought new plugs and plug wires, connected the 430 to a separate
> battery, swapped 430's with a friend, removed ground wires, cleaned and
> retightened them, installed noise filters on the 430 and Electroair,
> removed and inspected new plugs and new wires. Next I am going to
> remove the timing unit from the distributor hole, spin the unit and see
> if I can hear sparks, then try replace one high energy coil at a time.
>
> We are planning to fly to Colorado next week and I sure would like to
> NOT hear sparking noises when I am receiving a far away aircraft or ATC.
>
> Any other suggestions from the collective???
> Ronnie
>
>
> ----- Original Message -----
> *From:* Chuck Jensen <mailto:cjensen at dts9000.com>
> *To:* Velocity Aircraft Owners and Builders list
> <mailto:reflector at tvbf.org>
> *Sent:* Monday, June 11, 2007 1:11 PM
> *Subject:* Re: REFLECTOR: elevator cuff was Brake authority
>
> Ron,
>
> Thanks for the cuff description, I can visualize what you were
> describing but since I don't have any, I was just curious. I was
> suffering from cuff-envy until I realized it was fashionable not to
> have 'em.
>
> P.S. Nice looking paint and trim job on the bird. Now that its all
> painted up, I'm surprised you haven't found anything that you want
> to change!
>
> Chuck Jensen
>
> -----Original Message-----
> *From:* reflector-bounces at tvbf.org
> [mailto:reflector-bounces at tvbf.org] *On Behalf Of *Ron Brown
> *Sent:* Monday, June 11, 2007 10:41 AM
> *To:* Velocity Aircraft Owners and Builders list
> *Subject:* Re: REFLECTOR: elevator cuff was Brake authority
>
> Chuck,
>
> Don't have a picture - but I can describe them. It was a C shaped
> piece that was installed on the leading edge of the Elevator - which
> reduces the gap between the back of the canard and the elevator such
> that when the elevator is down, the gap is reduced from what it
> would be if the cuff wasn't there.
>
> It was installed on the inner half, span wise of the elevator.
>
> Ronnie
>
> ----- Original Message -----
> *From:* Chuck Jensen <mailto:cjensen at dts9000.com>
> *To:* Velocity Aircraft Owners and Builders list
> <mailto:reflector at tvbf.org>
> *Sent:* Monday, June 11, 2007 10:10 AM
> *Subject:* Re: REFLECTOR: elevator cuff was Brake authority
>
> Does anyone have a photo of the "cuffs" that are being
> discussed. I'm not sure I've ever seen the cuffs on the Velo.
> You're welcome to email directly.
>
> Chuck Jensen
>
> -----Original Message-----
> *From:* reflector-bounces at tvbf.org
> <mailto:reflector-bounces at tvbf.org>
> [mailto:reflector-bounces at tvbf.org] *On Behalf Of *Laurence Coen
> *Sent:* Friday, June 08, 2007 12:39 PM
> *To:* Velocity Aircraft Owners and Builders list
> *Subject:* Re: REFLECTOR: elevator cuff was Brake authority
>
> Al,
>
> The way I understand it, the elevator cuffs were one of three
> things done to address the deep stall problem. Your current
> main wing was redesigned and the canard was shortened. The
> cuffs are no longer needed. They were a modification for
> existing Velocities at that time. I received cuffs with my kit
> but never installed them. Their purpose is to increase the
> stall speed of the elevator which would explain your high stall
> speed.
>
> Larry Coen
> N136LC
>
> ----- Original Message -----
> *From:* Al Gietzen <mailto:ALVentures at cox.net>
> *To:* 'Velocity Aircraft Owners and Builders list'
> <mailto:reflector at tvbf.org>
> *Sent:* Thursday, June 07, 2007 11:34 AM
> *Subject:* Re: REFLECTOR: Brake authority
>
>
>
> I concur with Larry - 10KIAS makes a big difference.
>
> My canard stalls at 60KIAS with just me, 65KIAS with
>
> two people up front.
>
>
>
> I still have about half the width of the elevator cuff on
> the elevators. It gives a very gentle pitch-buck at stall,
> I’ve never felt a lack of elevator authority; and I never
> have full aft stick on landing. However; would removing the
> rest of the cuff reduce the stall speed?
>
>
>
> I have my ground idle set to about 500 RPMs (Lyc
>
> IO-540 with two mags) which is pretty much as slow as
>
> it will run
>
>
>
> My engine idle is about 850; that’s about 210 rpm on the prop.
>
>
>
> Al
>
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