Re: [DOG mailing list] Hour meter

[Kurt Redinbaugh]

My thanks to Michael Stockhill, Rob Thompson and Ian Williams etal for the
information and the enthusiasm for the Dimona and its aging aches and pains.
I look forward to your continuing support of #3660.
Kurt

On Fri, Aug 27, 2021 at 1:49 AM Rob Thompson 
wrote:

>
> You should be able to get an hour meter which is turned on by the Bosch W
> (tacho) terminal on the alternator.
>
> Alternatively, if your alternator doesn't have a W terminal what about a
> vibration sensor switch? They are cheap... Check out HERE
> 
> Connect one in series with an airswitch on the ASI line.
>
> I would be a bit reluctant to run extra oil lines. The L2000 oil pressure
> crankcase screw thread is notorious for developing cracks and stripping
> with just the tiniest bit over overtightening. I would not let anyone
> remove the pressure sender and screw in other fittings like T pieces unless
> absolutely necessary and you completely trust them with the life of your
> engine!.
>
> regards
> Rob
>
> Rob Thompson
> 0429 493 828
>
>
>
> On Fri, Aug 27, 2021 at 1:25 PM Michael Stockhill 
> wrote:
>
>> I would explore a tee fitting for the existing oil pressure sender so you
>> could add an oil pressure switch (most of these close with four pounds of
>> pressure) wired to a Hobbs meter. I would sign it off as a minor
>> alteration, especially since it is a non-certified engine.
>>
>> Might be fun to learn how the newer flight computers used in self
>> launchers differentiate running and non running time for recordings
>> flights.
>>
>>
>> On Thu, Aug 26, 2021, 6:30 PM Kurt Redinbaugh 
>> wrote:
>>
>>> Thank you for the information, Michael.
>>> I had sent the tacho to them and they returned it with a message that
>>> they couldn't fix it but to try the shop in Virginia Beach...who also said
>>> sorry.
>>> So I think I'm facing either using a stopwatch and keeping the engine
>>> time manually or going with the avionics shop at Minden who wants $750 to
>>> install an hour meter that works off the oil pressure. Yikes!
>>> The question I have is that since the pilot handbook says an engine hour
>>> meter is required in the minimum equipment list can I use a stopwatch?
>>> Still only 1 1/2 mile vis on a good day here so still ground bound.
>>> k
>>>
>>> On Mon, Aug 23, 2021 at 7:09 PM Michael Stockhill 
>>> wrote:
>>>
 Kurt, et al.

 I had my VDO tach overhauled and repaired in 2015 by:
 Palo Alto Speedometer, Inc.
 718 Emerson Street
 Palo Alto, CA 94301-2410
 (650) 323-0243
 www.paspeedo.com

 At the time, I requested them to keep the hour meter time, and the
 instrument face did not need refinishing, which they also provide if
 desired.

 Suggest a web search to see if they are current.

 Michael



 On Mon, Aug 23, 2021 at 11:08 AM Kurt Redinbaugh 
 wrote:

> All
> The hour meter built into the tach on my ship #3660 has quit working.
> I have sent the tach to VDO here in the New World and they say it cannot 
> be
> repaired due to it's age. Has anyone out there 1) a source for repair, 2) 
> a
> suitable replacement,3) a used trach I could purchase or 4) an
> alternative hour meter arrangement.
> Your help would be much appreciated.
> I am presently not able to fly due to the severe smoke in the Reno
> area so the timing is right to get this situation handled.
> Many Thanks
> Kurt
>

Re: [DOG mailing list] Hour meter

[Kurt Redinbaugh]

Thanks for the info Michael. I had sent the tacho to them and they said
they could not determine what the gear ratio (?) of the broken spur gear is
so they advised me to send it to a shop in Virginia Beach, who subsequently
said they couldn't help me and sent the tacho back to mel I have installed
a vibration sense meter and am interested to track it's time shown vs the
actual clock time of engine run.
k

On Mon, Aug 23, 2021 at 7:09 PM Michael Stockhill  wrote:

> Kurt, et al.
>
> I had my VDO tach overhauled and repaired in 2015 by:
> Palo Alto Speedometer, Inc.
> 718 Emerson Street
> Palo Alto, CA 94301-2410
> (650) 323-0243
> www.paspeedo.com
>
> At the time, I requested them to keep the hour meter time, and the
> instrument face did not need refinishing, which they also provide if
> desired.
>
> Suggest a web search to see if they are current.
>
> Michael
>
>
>
> On Mon, Aug 23, 2021 at 11:08 AM Kurt Redinbaugh 
> wrote:
>
>> All
>> The hour meter built into the tach on my ship #3660 has quit working. I
>> have sent the tach to VDO here in the New World and they say it cannot be
>> repaired due to it's age. Has anyone out there 1) a source for repair, 2) a
>> suitable replacement,3) a used trach I could purchase or 4) an
>> alternative hour meter arrangement.
>> Your help would be much appreciated.
>> I am presently not able to fly due to the severe smoke in the Reno area
>> so the timing is right to get this situation handled.
>> Many Thanks
>> Kurt
>>
>

Re: [DOG mailing list] Hour meter

[Rob Thompson]

You should be able to get an hour meter which is turned on by the Bosch W
(tacho) terminal on the alternator.

Alternatively, if your alternator doesn't have a W terminal what about a
vibration sensor switch? They are cheap... Check out HERE

Connect one in series with an airswitch on the ASI line.

I would be a bit reluctant to run extra oil lines. The L2000 oil pressure
crankcase screw thread is notorious for developing cracks and stripping
with just the tiniest bit over overtightening. I would not let anyone
remove the pressure sender and screw in other fittings like T pieces unless
absolutely necessary and you completely trust them with the life of your
engine!.

regards
Rob

Rob Thompson
0429 493 828



On Fri, Aug 27, 2021 at 1:25 PM Michael Stockhill  wrote:

> I would explore a tee fitting for the existing oil pressure sender so you
> could add an oil pressure switch (most of these close with four pounds of
> pressure) wired to a Hobbs meter. I would sign it off as a minor
> alteration, especially since it is a non-certified engine.
>
> Might be fun to learn how the newer flight computers used in self
> launchers differentiate running and non running time for recordings
> flights.
>
>
> On Thu, Aug 26, 2021, 6:30 PM Kurt Redinbaugh 
> wrote:
>
>> Thank you for the information, Michael.
>> I had sent the tacho to them and they returned it with a message that
>> they couldn't fix it but to try the shop in Virginia Beach...who also said
>> sorry.
>> So I think I'm facing either using a stopwatch and keeping the engine
>> time manually or going with the avionics shop at Minden who wants $750 to
>> install an hour meter that works off the oil pressure. Yikes!
>> The question I have is that since the pilot handbook says an engine hour
>> meter is required in the minimum equipment list can I use a stopwatch?
>> Still only 1 1/2 mile vis on a good day here so still ground bound.
>> k
>>
>> On Mon, Aug 23, 2021 at 7:09 PM Michael Stockhill 
>> wrote:
>>
>>> Kurt, et al.
>>>
>>> I had my VDO tach overhauled and repaired in 2015 by:
>>> Palo Alto Speedometer, Inc.
>>> 718 Emerson Street
>>> Palo Alto, CA 94301-2410
>>> (650) 323-0243
>>> www.paspeedo.com
>>>
>>> At the time, I requested them to keep the hour meter time, and the
>>> instrument face did not need refinishing, which they also provide if
>>> desired.
>>>
>>> Suggest a web search to see if they are current.
>>>
>>> Michael
>>>
>>>
>>>
>>> On Mon, Aug 23, 2021 at 11:08 AM Kurt Redinbaugh 
>>> wrote:
>>>
 All
 The hour meter built into the tach on my ship #3660 has quit working. I
 have sent the tach to VDO here in the New World and they say it cannot be
 repaired due to it's age. Has anyone out there 1) a source for repair, 2) a
 suitable replacement,3) a used trach I could purchase or 4) an
 alternative hour meter arrangement.
 Your help would be much appreciated.
 I am presently not able to fly due to the severe smoke in the Reno area
 so the timing is right to get this situation handled.
 Many Thanks
 Kurt

>>>

Re: [DOG mailing list] Hour meter

[Michael Stockhill]

I would explore a tee fitting for the existing oil pressure sender so you
could add an oil pressure switch (most of these close with four pounds of
pressure) wired to a Hobbs meter. I would sign it off as a minor
alteration, especially since it is a non-certified engine.

Might be fun to learn how the newer flight computers used in self launchers
differentiate running and non running time for recordings flights.


On Thu, Aug 26, 2021, 6:30 PM Kurt Redinbaugh  wrote:

> Thank you for the information, Michael.
> I had sent the tacho to them and they returned it with a message that they
> couldn't fix it but to try the shop in Virginia Beach...who also said sorry.
> So I think I'm facing either using a stopwatch and keeping the engine time
> manually or going with the avionics shop at Minden who wants $750 to
> install an hour meter that works off the oil pressure. Yikes!
> The question I have is that since the pilot handbook says an engine hour
> meter is required in the minimum equipment list can I use a stopwatch?
> Still only 1 1/2 mile vis on a good day here so still ground bound.
> k
>
> On Mon, Aug 23, 2021 at 7:09 PM Michael Stockhill 
> wrote:
>
>> Kurt, et al.
>>
>> I had my VDO tach overhauled and repaired in 2015 by:
>> Palo Alto Speedometer, Inc.
>> 718 Emerson Street
>> Palo Alto, CA 94301-2410
>> (650) 323-0243
>> www.paspeedo.com
>>
>> At the time, I requested them to keep the hour meter time, and the
>> instrument face did not need refinishing, which they also provide if
>> desired.
>>
>> Suggest a web search to see if they are current.
>>
>> Michael
>>
>>
>>
>> On Mon, Aug 23, 2021 at 11:08 AM Kurt Redinbaugh 
>> wrote:
>>
>>> All
>>> The hour meter built into the tach on my ship #3660 has quit working. I
>>> have sent the tach to VDO here in the New World and they say it cannot be
>>> repaired due to it's age. Has anyone out there 1) a source for repair, 2) a
>>> suitable replacement,3) a used trach I could purchase or 4) an
>>> alternative hour meter arrangement.
>>> Your help would be much appreciated.
>>> I am presently not able to fly due to the severe smoke in the Reno area
>>> so the timing is right to get this situation handled.
>>> Many Thanks
>>> Kurt
>>>
>>

Re: [DOG mailing list] Hour meter

[Kurt Redinbaugh]

Thank you for the information, Michael.
I had sent the tacho to them and they returned it with a message that they
couldn't fix it but to try the shop in Virginia Beach...who also said sorry.
So I think I'm facing either using a stopwatch and keeping the engine time
manually or going with the avionics shop at Minden who wants $750 to
install an hour meter that works off the oil pressure. Yikes!
The question I have is that since the pilot handbook says an engine hour
meter is required in the minimum equipment list can I use a stopwatch?
Still only 1 1/2 mile vis on a good day here so still ground bound.
k

On Mon, Aug 23, 2021 at 7:09 PM Michael Stockhill  wrote:

> Kurt, et al.
>
> I had my VDO tach overhauled and repaired in 2015 by:
> Palo Alto Speedometer, Inc.
> 718 Emerson Street
> Palo Alto, CA 94301-2410
> (650) 323-0243
> www.paspeedo.com
>
> At the time, I requested them to keep the hour meter time, and the
> instrument face did not need refinishing, which they also provide if
> desired.
>
> Suggest a web search to see if they are current.
>
> Michael
>
>
>
> On Mon, Aug 23, 2021 at 11:08 AM Kurt Redinbaugh 
> wrote:
>
>> All
>> The hour meter built into the tach on my ship #3660 has quit working. I
>> have sent the tach to VDO here in the New World and they say it cannot be
>> repaired due to it's age. Has anyone out there 1) a source for repair, 2) a
>> suitable replacement,3) a used trach I could purchase or 4) an
>> alternative hour meter arrangement.
>> Your help would be much appreciated.
>> I am presently not able to fly due to the severe smoke in the Reno area
>> so the timing is right to get this situation handled.
>> Many Thanks
>> Kurt
>>
>

Re: [DOG mailing list] Hour meter

[Michael Stockhill]

Kurt, et al.

I had my VDO tach overhauled and repaired in 2015 by:
Palo Alto Speedometer, Inc.
718 Emerson Street
Palo Alto, CA 94301-2410
(650) 323-0243
www.paspeedo.com

At the time, I requested them to keep the hour meter time, and the
instrument face did not need refinishing, which they also provide if
desired.

Suggest a web search to see if they are current.

Michael



On Mon, Aug 23, 2021 at 11:08 AM Kurt Redinbaugh 
wrote:

> All
> The hour meter built into the tach on my ship #3660 has quit working. I
> have sent the tach to VDO here in the New World and they say it cannot be
> repaired due to it's age. Has anyone out there 1) a source for repair, 2) a
> suitable replacement,3) a used trach I could purchase or 4) an
> alternative hour meter arrangement.
> Your help would be much appreciated.
> I am presently not able to fly due to the severe smoke in the Reno area so
> the timing is right to get this situation handled.
> Many Thanks
> Kurt
>

RE: [DOG mailing list] Hour meter

[Ian Williams]

The VDO part no of the Taco is 333-953

The air switch is a HERGA   Manuf Part No  6743-0003   and RS part No 317-443.

 

 

 

From: dog@lists.riverland.net.au On Behalf Of Ian Williams
Sent: Tuesday, 24 August 2021 11:40 a.m.
To: dog@lists.riverland.net.au
Subject: RE: [DOG mailing list] Hour meter

 

Hi All,

I hope this will be of some help.  As I totally rewired our GCB (S/No 3537) I 
updated some of the systems.  One was the taco (Elecric VDO) and hour meters   
The result is as the picture attached.

However a few things.  

I didn’t use the mechanical cable drive, rather used a hall effect sensor from 
Aircraft Spruce which screws under the magneto (in the bottom vent hole)   a 
real plus is calibration … in NZ our power supply is 50Hz, so it is real easy 
to calibrate … 50Hz is 3000RPM.

The hour meters are also VDO and mechanically record when there is a 12v 
SUPPLY. (one for airframe and one for engine) 

So I used a little air switch from Radio Spares  (can give you the part no if 
needed)  connected to the pitot pressure.  This switch basically puts an earth 
on both hourmeters, so when flying of course both would operate.  However I 
connected the supply of one to the plus bus  (airframe) and the other to the 
relay which is connected to the 2 pole oil pressure switch  (refer the Dimona 
wiring diagram)The system has worked perfectly.

 

Best regards

Ian Williams 

New Zealand  

 

From: dog@lists.riverland.net.au <mailto:dog@lists.riverland.net.au>  On Behalf 
Of Kurt Redinbaugh
Sent: Tuesday, 24 August 2021 5:08 a.m.
To: dog@lists.riverland.net.au <mailto:dog@lists.riverland.net.au> 
Subject: [DOG mailing list] Hour meter

 

All

The hour meter built into the tach on my ship #3660 has quit working. I have 
sent the tach to VDO here in the New World and they say it cannot be repaired 
due to it's age. Has anyone out there 1) a source for repair, 2) a suitable 
replacement,3) a used trach I could purchase or 4) an alternative hour 
meter arrangement.

Your help would be much appreciated.

I am presently not able to fly due to the severe smoke in the Reno area so the 
timing is right to get this situation handled.

Many Thanks

Kurt

Re: [DOG mailing list] Hour meter

[Rob Thompson]

Further to my last email, I forgot to mention that the electronic hour
meters don't slow down at low revs like the mechanical VDO one does. If you
do a lot of taxying this can add up considerably.
It is best to install a seperate hour meter which is connected to an air
switch on the ASI line.
regards
Rob

Rob Thompson
0429 493 828



On Tue, Aug 24, 2021 at 8:35 AM Rob Thompson 
wrote:

> Consider buying an electric tacho designed for a diesel engine. Very cheap
> from boating shops.
> They connect to the alternator terminal which will be labeled P T S or W
> depending on the brand. Bosch is W.
> If your alternator does not have one of these terminals you need to remove
> the back plastic cover of the alternator and solder a wire onto one of the
> phases on the winding side of the diodes.
>
> regards
> Rob
>
> Rob Thompson
> 0429 493 828
>
>
>
> On Tue, Aug 24, 2021 at 3:08 AM Kurt Redinbaugh 
> wrote:
>
>> All
>> The hour meter built into the tach on my ship #3660 has quit working. I
>> have sent the tach to VDO here in the New World and they say it cannot be
>> repaired due to it's age. Has anyone out there 1) a source for repair, 2) a
>> suitable replacement,3) a used trach I could purchase or 4) an
>> alternative hour meter arrangement.
>> Your help would be much appreciated.
>> I am presently not able to fly due to the severe smoke in the Reno area
>> so the timing is right to get this situation handled.
>> Many Thanks
>> Kurt
>>
>

Re: [DOG mailing list] Hour meter

[Rob Thompson]

Consider buying an electric tacho designed for a diesel engine. Very cheap
from boating shops.
They connect to the alternator terminal which will be labeled P T S or W
depending on the brand. Bosch is W.
If your alternator does not have one of these terminals you need to remove
the back plastic cover of the alternator and solder a wire onto one of the
phases on the winding side of the diodes.

regards
Rob

Rob Thompson
0429 493 828



On Tue, Aug 24, 2021 at 3:08 AM Kurt Redinbaugh 
wrote:

> All
> The hour meter built into the tach on my ship #3660 has quit working. I
> have sent the tach to VDO here in the New World and they say it cannot be
> repaired due to it's age. Has anyone out there 1) a source for repair, 2) a
> suitable replacement,3) a used trach I could purchase or 4) an
> alternative hour meter arrangement.
> Your help would be much appreciated.
> I am presently not able to fly due to the severe smoke in the Reno area so
> the timing is right to get this situation handled.
> Many Thanks
> Kurt
>