From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Turbo report
Date: Fri, 24 Aug 2018 07:08:59 +0800
References: <list-11554088@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-11554088@logan.com>
Message-Id: <C9771BA1-2FC9-448A-ABC8-9B2BC0B93C47@gmail.com>

Thanks Bobby
I=E2=80=99ve been seeking to learn about turbo maps.

Steve

> On 23 Aug 2018, at 9:53 pm, Bobby J. Hughes bhughes@qnsi.net =
<flyrotary@lancaironline.net> wrote:
>=20
> Steve,
>=20
> BorgWarner has a very detailed calculator that is used. The calculator =
has a limited selection of BW turbos but the data can easily be applied =
to other manufactures published specifications. I entered data for =
several altitudes and boost pressures and used a scatter plot over =
several turbo maps from other companies. The TO4E 50 Trim was a good =
choice but was a little limited for my application. I ended up with a =
Garrett 3076R, 76.2mm , 56 trim with Tail SS 1.06 housing. =20
> Bobby
>=20
>=20
>=20
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20=

> Sent: Wednesday, August 22, 2018 8:33 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Turbo report
>=20
> Bobby, what turbocharger have you chosen and what was the rationale =
behind your choice?
> Cheers
> Steve Izett
>=20
>> On 23 Aug 2018, at 8:25 am, Bobby J. Hughes bhughes@qnsi.net =
<flyrotary@lancaironline.net> wrote:
>>=20
>> Dave
>>=20
>> That=E2=80=99s great news. TOT is the outlet temperature? If so I =
would have expected it to be lower. The last coupe of years I have been =
successful in keeping climb EGT=E2=80=99s under 1600F on most flights. =
High OAT and quick fuel stops are the exception. But I think the heat =
soaked engine and super charger is the cause. Performance actually =
increases after climbing and everything cools off. Typical F/A for =
initial climb is 11.3 :1 for 1600F EGT=E2=80=99s. I ended up with an O2 =
bung on each rotor and tuned for a near perfect match between 28-40=E2=80=9D=
 MP.  Unfortunately the EGT spread varies a lot in other flight =
conditions.  I=E2=80=99m slowly working on a turbo FWF to replace the =
supercharger. I=E2=80=99ve done most of the work on the header with he =
exception of wastegate, down pipe and bungs. The turbo is located as =
faraway from the exhaust ports as I could mount it in hopes of dropping =
EGT=E2=80=99s a little more.=20
>>=20
>> Link to photos
>> =
https://www.dropbox.com/sh/41hrm00tyqapp0s/AAAiusuG0BHTJy9inZujGj-Va?dl=3D=
0
>>=20
>> Bobby
>>=20
>>=20
>> Sent from my iPad
>>=20
>> On Aug 22, 2018, at 5:54 PM, David Leonard wdleonard@gmail.com =
<flyrotary@lancaironline.net> wrote:
>>=20
>>> Hi Bobby,
>>>=20
>>> Yes, no new torbo failures since I decided to keep TOT (the only =
place I measure exhaust) less than 890C.  Basically,  I treat it like an =
aircraft engine.  Rich of peak for climbing and decending (TOT around =
810C) then lean at altitude when the MAP is lower  (around 870C).  Peak =
TOT is around 915C. =20
>>>=20
>>> Dave Leonard=20
>>>=20
>>> On Wed, Aug 22, 2018, 3:18 PM Bobby J. Hughes bhughes@qnsi.net =
<flyrotary@lancaironline.net> wrote:
>>> Dave
>>>=20
>>> How is the turbo holding up?  Is keeping EGT=E2=80=99s under 1600F =
keeping it alive?
>>>=20
>>> Bobby=20
>>> 500 hrs
>>>=20
>>> Sent from my iPad
>>>=20
>>> On Aug 22, 2018, at 5:06 PM, David Leonard wdleonard@gmail.com =
<flyrotary@lancaironline.net> wrote:
>>>=20
>>>> Thanks Kelly!
>>>> Yes, I am still using the flywheel and strongly suggest not using =
the flex plate.  Adaption was easy with a trip to a local machine shop.  =
Details are in the archives.=20
>>>>=20
>>>> On Wed, Aug 22, 2018, 2:41 PM Kelly Troyer keltro@gmail.com =
<flyrotary@lancaironline.net> wrote:
>>>> Dave,
>>>>=20
>>>>   Not aware of a flexplate/flywheel replacement made specifically =
for use with=20
>>>> Tracy's redrive but Dave Leonard (Turbo/13B-RV6) adapted an =
aluminum racing
>>>> manual transmission flywheel to his redrive after his flexplate =
developed serious
>>>> cracks while qualifying to race at the Reno National Air-Races =
several years ago.
>>>>=20
>>>>  Perhaps Dave will jump in here with how he did it.......I know =
there are a series=20
>>>> of E mails in the archives with photos of how he did it....As far =
as I know he still
>>>> is flying with this flywheel........FWIW
>>>>=20
>>>> Kelly Troyer
>>>>=20
>>>> On Wed, Aug 22, 2018 at 4:17 PM, Pam & Dave Williams =
padajute@idcnet.com <flyrotary@lancaironline.net> wrote:
>>>> Hello,
>>>>=20
>>>> I am looking for a flex plate for hooking up my 13B to Tracy Crooks =
redrive.
>>>> If that is not available, is anybody making a flywheel replacement?
>>>>=20
>>>> Thanks,
>>>> Dave Williams=20
>>>> Whitewater WI
>>>>=20
>>>> -----Original Message-----
>>>> From: Rotary motors in aircraft =
[mailto:flyrotary@lancaironline.net]=20
>>>> Sent: Friday, June 29, 2018 9:37 AM
>>>> To: Rotary motors in aircraft <flyrotary@lancaironline.net>
>>>> Subject: [FlyRotary] Re: flyrotary : Re Tension Bolts
>>>>=20
>>>> I too broke a tension bolt several years ago and was fortunate =
enough to get
>>>> a set of the NEW ones 0.500" from a friend - highly recommended.
>>>> Mazda increased the size of those bolts for a reason and my =
original set
>>>> were all spiraled with silicone ... put a little silicone on the =
0.50" as
>>>> well.
>>>> Jeff
>>>>=20
>>>>=20
>>>> Dave,
>>>>=20
>>>> Run a spiral of RTV around the body of those tension bolts next =
time you
>>>> remove them.  That will pretty much eliminate the vibration =
breakage.  Don't
>>>> put it on the threads.
>>>>=20
>>>> Bill B
>>>>=20
>>>> Hello,
>>>>=20
>>>> I am a newbie on the site. I have a Tailwind with a 13B and Tracy's =
controls
>>>> with his redrive. To this point I have been very pleased with the
>>>> combination. Last month I broke a tension bolt and have ordered new =
and
>>>> improved .500" bolts from Mazdatrix. My original .312" bolts broke =
from
>>>> vibration. I have 20 hours on the motor and never had any cooling =
issues. I
>>>> suppose that means I am over cooled, but that is okay with me. I =
will make
>>>> cooling improvements when I am back in the air. My 13B is stock and =
I run it
>>>> at 6,300 RPM.
>>>>=20
>>>> Thanks,
>>>> Dave Williams
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>=20
>=20
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>=20
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