From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] [FlyRotary] Re: RD1-C flange type and bolt size
Date: Sun, 25 Oct 2020 14:20:07 +0800
References: <list-871792@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-871792@logan.com>
Message-Id: <07387C73-77B0-42BA-92CD-FE9EE7244A7F@gmail.com>

Thanks guys.

Steve

> On 25 Oct 2020, at 12:55 am, Charlie England ceengland7@gmail.com =
<flyrotary@lancaironline.net> wrote:
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> I purchased the MT prop & drive from the estate of  Mark S. I haven't =
picked it up yet, but it's supposed to have a 14" or 15" spinner, and my =
cowl is set up for a 13". If I can't fit Van's standard 13" spinner to =
the MT, I'll likely do as Bobby suggests, and make a 'cuff' for the nose =
of the cowl to match the spinner.
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> Charlie=20
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> On Sat, Oct 24, 2020 at 10:35 AM Charlie England ceengland7@gmail.com =
<flyrotary@lancaironline.net> wrote:
> =46rom Bobby:
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> Still can=E2=80=99t post. =20
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> Sent from my iPad
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> Begin forwarded message:
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>> From: Bobby Hughes <BHughes@qnsinc.net>
>> Date: October 24, 2020 at 9:53:07 AM CDT
>> To: Rotary motors in aircraft <flyrotary@lancaironline.net>
>> Subject: Re: [FlyRotary] Re: RD1-C flange type and bolt size
>>=20
>> =EF=BB=BF
>> Steve,
>>=20
>> If the cowl spacing needs to be adjusted it might be less expensive =
to modify the cowling. =20
>>=20
>> Bobby
>>=20
>> Get Outlook for iOS
>> From: Rotary motors in aircraft <flyrotary@lancaironline.net> on =
behalf of Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net>
>> Sent: Friday, October 23, 2020 6:17:27 PM
>> To: Rotary motors in aircraft <flyrotary@lancaironline.net>
>> Subject: [FlyRotary] Re: RD1-C flange type and bolt size
>> =20
>> Thanks guys. Appreciated.
>>=20
>> As far as the MT I=E2=80=99m looking at, I=E2=80=99ll need to reduce =
the spinner diameter from 13 inch to 12 inch. Id this likely to present =
problems or substantive cost?
>>=20
>> Steve
>>=20
>> > On 24 Oct 2020, at 12:47 am, Charlie England ceengland7@gmail.com =
<flyrotary@lancaironline.net> wrote:
>> >=20
>> > =46rom Bobby:
>> >=20
>> > Deployed a new exchange server this week and can=E2=80=99t post.
>> >=20
>> >=20
>> >=20
>> > Flange is SAE-2 And will need new bushings / drive lugs for an MT =
prop. I don=E2=80=99t remember how many of the bolts are drive lugs.
>> >=20
>> >=20
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>> > Bobby
>> >=20
>> >=20
>> >=20
>> > On Fri, Oct 23, 2020 at 11:29 AM Charlie England =
ceengland7@gmail.com <flyrotary@lancaironline.net> wrote:
>> > It would be a good idea to verify the bushing outside diameter for =
that particular model, and also verify whether all 6 bushings can remain =
in place. Some Hartzell constant speed props only have counterbores for =
4 out of the 6 bushings. Perhaps Bobby can tell you whether the MT props =
do the same thing. For an example, see this link:
>> > http://mstewart.net/super8/propclock/index.htm
>> >=20
>> > Charlie
>> >=20
>> > On Fri, Oct 23, 2020 at 10:46 AM Stephen Izett =
stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
>> > Thanks Charlie
>> >=20
>> > I=E2=80=99m interested in a MTV-7-C 183-51 and wondered if it would =
fit the RD1-C flange.
>> > My main reason is to increase the diameter out to 72inch to get =
increased prop tip speed.
>> > When I ordered the RD1C all these years ago I didn=E2=80=99t =
understand that Tracy only recommended the C version for larger props.
>> >=20
>> > The MT documentation suggests that a C version has SAE No. 2 mod. =
bolts 7/16"-20 UNF
>> > So sounds like you think it could fit with a change to the =
bushings.
>> >=20
>> > Thanks
>> >=20
>> > Steve
>> >=20
>> >=20
>> > > On 23 Oct 2020, at 11:33 pm, Charlie England ceengland7@gmail.com =
<flyrotary@lancaironline.net> wrote:
>> > >=20
>> > > On 10/23/2020 10:13 AM, Stephen Izett stephen.izett@gmail.com =
wrote:
>> > >> Hi Guys
>> > >>=20
>> > >> I=E2=80=99m considering a prop change and wanting to confirm the =
flange type on the RD1-C
>> > >> Does anyone know the type of flange? and do most Lycoming 360 =
series engines have that same bolt pattern and flange dimension?
>> > >>=20
>> > >> Cheers
>> > >>=20
>> > >> Steve Izett
>> > >> Glasair SIISRG Renesis 4 port RD1-C
>> > >>=20
>> > > Tracy's flange in stock condition uses 3/8" dia bolts. The =
bushings (drive lugs) are 5/8" in diameter.
>> > >=20
>> > > Most Lyc 360s I'm aware of use 1/2" bolts, and the bushings are =
3/4" in diameter. Some Lyc 320s use 7/16" bolts with the same 5/8" =
bushing diameter; there may be some 360s using 7/16" bolts but I've =
never seen one.
>> > >=20
>> > > I know that Mark S and Bobby modified their hubs to the larger =
bushings/bolts, to fit their MT electric props.
>> > >=20
>> > > Bolt circle diameter is the same for all bolt sizes; 320s & 360s.
>> > >=20
>> > > Charlie
>> > >=20
>> > > --=20
>> > > This email has been checked for viruses by Avast antivirus =
software.
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