REFLECTOR: IVO Props

[Joe Ewen]

John,

Thats good to hear - the PTC.  That is the approach I took on my IVO wiring, 
as well as a Hall Effect Current Sensors.
Joe


----- Original Message ----- 
From: "John Overman" <mooneydryver at yahoo.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Thursday, February 07, 2008 11:36 AM
Subject: Re: REFLECTOR: IVO Props


> Hiroo, I read a report by an owner with an IVO who
> used "PTC" fuses. These are the electronic fuses that
> "Blow" and remain open as long as the (overload/short)
> persists, but reset when turned off or the problem
> goes away. This owner said that the "PTC" would blow
> practically the instant that a limit was reached on
> the prop.
>                 John Overman
>                       Velocity N711VE (reserved)
>                       Mazda/turbo/IVO
>
>
> --- Hiroo Umeno <humeno at microsoft.com> wrote:
>
>> I have flown IVO + Franklin combo for about 35 hours
>> and over-all, I do like the setup.  I do like its
>> simplicity and the failure mode (not the blade
>> shedding kind) where the prop will "stick" to where
>> you set it last and you can continue flying like a
>> fixed pitch prop.  The pitch variation does work and
>> the rpm / MP / seat of the pants will tell you that.
>>
>> Like Chuck mentioned, checking the crush-plate
>> torque is a MUST for first several hours.  Mine
>> stopped moving after 10 or so hours but I still do
>> torque it just to be sure before every flight.
>>
>> One minor annoyance is that there is no limit switch
>> on the thing so CB popping is the indication that
>> you have reached the end of travel in either
>> direction.  I haven't reached this in my fling (I
>> can tell before the motor seizes that the prop is no
>> longer twisting).  Also, in its default
>> installation, it is not a true CS prop but is an
>> "adjustable pitch" prop.  It's a bit more
>> baby-sitting than a real CS prop.  You can get a
>> control unit that will turn it into a CS setup,
>> though.
>>
>> Hiroo
>>
>>
>
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