107 is  loud, although it might be acceptable inside the cabin with  headsets on. What do  you think?  I was hoping for much better.  Perhaps turbulators in the down pipe would help.   Performance seems  to be o.k. thus far, would you agree?  Jerry



On May 1, 2006, at 9:07 AM, Bob White wrote:

> Hi Jerry,
>
> Well, no.  I noted max water temp at 201 F and measured the dB  > level at
> 6000 rpm and 50 ft in front of the plane to be 107 dB (A  > weighting), but
> I don't remember the EGT.  I didn't leave it there too long, so it may
> not have stabilized.  Same for water temp.  Oil temps have been  > running
> a little lower than water.  I really need to get my video camera set
> up.
>
> I still need to fiddle with tuning too.  I added a can around the air
> filter, and the mixture seems to be running leaner.  This seems
> counter intuitive unless I'm getting some positive pressure from the
> prop blast.  Or something else may have changed that I'm not thinking
> about.  The MAP readings are bouncing around a bit especially at low
> RPM.  I can get idle down to 1600 or so.  At 1000-1200 I hit the
> resonance in the gear box.
>
> Bob W.
>
>
> On Mon, 1 May 2006 07:43:34 -0400
> Jerry Hey <jerryhey@earthlink.net> wrote:
>
>> Bob,  Did you notice the EGT during the WOT?    Jerry
>>
>> On Apr 28, 2006, at 11:13 PM, Bob White wrote:
>>
>>> Hi Buly,
>>>
>>> There's a few things on the list he sent that doesn't sound quite
>>> right.  As long as I can do it without too much of a hassle, I  >>> guess I
>>> will.  The actual wording is "a ground run to max power in a nose  >>> high
>>> attitude approaching an in flight stall".  That sounds like an
>>> invitation to do an inadvertent take-off if I ever heard one.   >>> When I
>>> flew with the previous owner, the time from full power  >>> application to
>>> lift off was about 5 seconds.
>>>
>>> I think the A&P may be a problem also.  I need one because I didn't
>>> build the airplane.  He sounded OK when I first talked to him, but
>>> more
>>> recently he's been talking about checking to make sure the plane was
>>> built to plans and stuff.  I think he's supposed to check the  >>> brakes,
>>> make sure the flaps aren't falling off, etc.  I think his  >>> implication
>>> is that the original builder could modify anything he wanted to, but
>>> that I can't.  This view seems to me to go beyond the roll of the  >>> A&P
>>> as I understand it.  I may have to find another one that understands
>>> experimentals.
>>>
>>> Bob W.
>>>
>>> On Fri, 28 Apr 2006 22:35:30 -0400
>>> Bulent Aliev <atlasyts@bellsouth.net> wrote:
>>>
>>>> Hi Bob, looks like you are making lots of power. My DAR never asked
>>>> for high speed taxi, or even if I have run the engine. I don't  >>>> think
>>>> high speed taxi is a requirement.
>>>> Buly
>>>> On Apr 28, 2006, at 9:24 PM, Bob White wrote:
>>>>
>>>>> I've been trying to finish up all the little nitpicking details
>>>>> and a
>>>>> few big details so I haven't ran my engine for quite a while.  I
>>>>> made
>>>>> up my mind to get some time on it today.  The weather was a bit
>>>>> nasty
>>>>> today with the winds kicking up to 20-30 kts (it wasn't that bad
>>>>> when I
>>>>> started).  I fired it up, and the first problem showed up - No
>>>>> charging.  The new alternator mount from Pineapple racing is power
>>>>> coated and insulating the alternator from the block.  I rigged  >>>>> up a
>>>>> jumper to fix that problem, and started the engine again.  All was
>>>>> well.  After taxiing around for 1/2 hour or so, I hit 4 hours run
>>>>> time.  Bruce T.'s break in instructions was to run the engine 5
>>>>> hours
>>>>> below 4500, but I couldn't stand the suspense any longer.  I  >>>>> really
>>>>> wanted to find out what my static RPM was.  So, I stopped it  >>>>> heading
>>>>> into the wind and gave it full throttle.  I saw 6400 RPM and  >>>>> backed
>>>>> off.
>>>>> The mixture was going a little lean, so I turned up the mixture  >>>>> and
>>>>> got
>>>>> 6600 RPM.  Max manifold pressure was a little over 23.  (Don't
>>>>> forget
>>>>> that I'm at 6000 ft.)  That's a little over the 6000 RPM limit
>>>>> Bruce has
>>>>> for the 5 to 15 hour segment, but his regime seems quite a bit  >>>>> more
>>>>> conservative that some of the other break-in schemes I've heard on
>>>>> here.  :)  With this prop, I suspect I could exceed my RPM
>>>>> redline of
>>>>> 7500.  If everything is looking OK, I may increase that to 7700.
>>>>>
>>>>> It seems like I'm a little under propped.  This prop is 68 in.  >>>>> dia,
>>>>> with
>>>>> a 78 in. pitch.
>>>>>
>>>>> I also found out that a little air flowing over the rads is a good
>>>>> thing.  As I mentioned earlier, the wind was kicking up to  >>>>> about 30
>>>>> knots toward the end.  While taxiing downwind, the water temp
>>>>> started
>>>>> climbing above 200 F.  I shut the engine down, got out and pushed
>>>>> the
>>>>> plane around into the wind.  After starting the engine back up,  >>>>> the
>>>>> temps dropped down to 160F.
>>>>>
>>>>> Now the next big question is how badly will my new cowling and
>>>>> cooling
>>>>> plenum screw up the cooling.  I'm only about 1/2 done with the
>>>>> cowling
>>>>> mods and getting ready to jump back into some more fiberglass  >>>>> work.
>>>>> Apparently according to the checklist my DAR sent, I need to do a
>>>>> high
>>>>> speed taxi test.  I'm not going to do that until I think the
>>>>> plane is
>>>>> airworthy, even if I don't have the paperwork!!
>>>>>
>>>>> Bob W.
>>>>>
>>>>> -- >>>>> http://www.bob-white.com
>>>>> N93BD - Rotary Powered BD-4 (first engine start 1/7/06)
>>>>> Custom Cables for your rotary installation -
>>>>> http://www.roblinphoto.com/shop/
>>>>>
>>>>> --
>>>>> Homepage:  http://www.flyrotary.com/
>>>>> Archive and UnSub:   http://mail.lancaironline.net/lists/ >>>>> flyrotary/
>>>>
>>>>
>>>> --
>>>> Homepage:  http://www.flyrotary.com/
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>>>
>>>
>>> -- >>> http://www.bob-white.com
>>> N93BD - Rotary Powered BD-4 (first engine start 1/7/06)
>>> Custom Cables for your rotary installation -
>>> http://www.roblinphoto.com/shop/
>>>
>>> --
>>> Homepage:  http://www.flyrotary.com/
>>> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
>>
>>
>> --
>> Homepage:  http://www.flyrotary.com/
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>
>
> -- > http://www.bob-white.com
> N93BD - Rotary Powered BD-4 (first engine start 1/7/06)
> Custom Cables for your rotary installation -
> http://www.roblinphoto.com/shop/
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/


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