X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) From: "Charlie England ceengland7@gmail.com" Received: from mail-io1-f52.google.com ([209.85.166.52] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 869329 for flyrotary@lancaironline.net; Fri, 23 Oct 2020 12:28:50 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.166.52; envelope-from=ceengland7@gmail.com Received: by mail-io1-f52.google.com with SMTP id u62so2465316iod.8 for ; Fri, 23 Oct 2020 09:28:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=jf5l5l7m1QjqucvDPcPWxePToLluDxdbD9+SE7iUDfQ=; b=X3VEKGMCyDm8ELOCtHpzL0JWFXAVTElXiC61RU/485Ss86m3fHpnQRJWrXDA1WHW2V QW5sjg3XJj1JfbaU0P2zFWiFRhhFxKhswJuQ6MlSMqgZq5x0b1wR8CHxhTdJUDYzluSJ bZYQEKbhLeX+2PeZ7gbR9+fZlHyO94n/AIkgLEUvXxul+WEj2/OFBa7npBH0e6rLSOV7 ey+EKfuzkKsMl9OrR3cIeC1A2SuqNsxkrod1bFETV6vXFzG6u6WpO/w7mH7rtlnsAA3j w1s5OFdKvZhIdBDLHiuO6IYVsh0uNt5uP0fUIJcmu+LedPvl7+f/VSLnIoNTNi03SAzQ 1hDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=jf5l5l7m1QjqucvDPcPWxePToLluDxdbD9+SE7iUDfQ=; b=WIolPvdpLL7YZ9TBlv7hn+Q1MeOQv9REjt6L+yeV4+3NX6LZCH815SCRgAPLJott60 vG5qsjLqmzcXgJWNiffajPqlzM7xNei+wwfmoTjDHYhVuNzrVc2ZSroK8avlhxP6S/NV E66/TpQTgQBGwr7V/UgatH7LUkp78YMcq5edNzCB9GktdYZ+rFwh/vjJp9nuPVToXiHX KDdYsu8CZ0vFoEqE6FeyzTqehy9QKm88QCGW7Iri1tX/gnfUfpnyqtjopH3WHy1eZghi hZJyWs83sw+dTEOJ/Fbc6323HT32YVZUfrzxHtk7oBqH2R24+9YrW4+QITN0beqgtfhD VIew== X-Gm-Message-State: AOAM531LLx8T994pe8xzLXK/LmVw62NNKtVh9gCbyJiT4w1MSNrI3rUw EOdW8ZKsO3TUGYo4BV7nwZxdV64MRTbCuMt/5uT/NMZVsHA= X-Google-Smtp-Source: ABdhPJwFzmr/lhWAVXbdrwhRwuyC+Pxm7mTs5cyOyzYkoY92yk+Ow1r8WAUf+aEpDq9XzKHp0C8f+EuQWvHEFAZMQHA= X-Received: by 2002:a05:6602:1482:: with SMTP id a2mr2231964iow.181.1603470513226; Fri, 23 Oct 2020 09:28:33 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Fri, 23 Oct 2020 11:24:33 -0500 Message-ID: Subject: Re: [FlyRotary] Re: RD1-C flange type and bolt size To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="00000000000059523005b2591276" --00000000000059523005b2591276 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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 Charlie On Fri, Oct 23, 2020 at 10:46 AM Stephen Izett stephen.izett@gmail.com < flyrotary@lancaironline.net> wrote: > Thanks Charlie > > I=E2=80=99m interested in a MTV-7-C 183-51 and wondered if it would fit t= he 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 t= hat Tracy > only recommended the C version for larger props. > > 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. > > Thanks > > Steve > > > > On 23 Oct 2020, at 11:33 pm, Charlie England ceengland7@gmail.com < > flyrotary@lancaironline.net> wrote: > > > > On 10/23/2020 10:13 AM, Stephen Izett stephen.izett@gmail.com wrote: > >> Hi Guys > >> > >> I=E2=80=99m considering a prop change and wanting to confirm the flang= e 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? > >> > >> Cheers > >> > >> Steve Izett > >> Glasair SIISRG Renesis 4 port RD1-C > >> > > Tracy's flange in stock condition uses 3/8" dia bolts. The bushings > (drive lugs) are 5/8" in diameter. > > > > 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 on= e. > > > > I know that Mark S and Bobby modified their hubs to the larger > bushings/bolts, to fit their MT electric props. > > > > Bolt circle diameter is the same for all bolt sizes; 320s & 360s. > > > > Charlie > > > > -- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > > > -- > > Homepage: http://www.flyrotary.com/ > > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --00000000000059523005b2591276 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
It = would be a good idea to verify the bushing outside diameter for that partic= ular model, and also verify whether all 6 bushings can remain in place. Som= e Hartzell constant speed props only have counterbores for 4 out of the 6 b= ushings. 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

Charlie

On Fri, Oct 23, 2020 at 10:46 A= M Stephen Izett stephen.izett@gm= ail.com <flyrotary@la= ncaironline.net> wrote:
Thanks Charlie

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 p= rop tip speed.
When I ordered the RD1C all these years ago I didn=E2=80=99t understand tha= t Tracy only recommended the C version for larger props.

The MT documentation suggests that a C version has SAE No. 2 mod. bolts 7/1= 6"-20 UNF
So sounds like you think it could fit with a change to the bushings.

Thanks

Steve


> On 23 Oct 2020, at 11:33 pm, Charlie England ceengland7@gmail.com <flyrotary@lancaironline= .net> wrote:
>
> On 10/23/2020 10:13 AM, Stephen Izett stephen.izett@gmail.com wrote:
>> Hi Guys
>>
>> I=E2=80=99m considering a prop change and wanting to confirm the f= lange type on the RD1-C
>> Does anyone know the type of flange? and do most Lycoming 360 seri= es engines have that same bolt pattern and flange dimension?
>>
>> Cheers
>>
>> Steve Izett
>> Glasair SIISRG Renesis 4 port RD1-C
>>
> Tracy's flange in stock condition uses 3/8" dia bolts. The bu= shings (drive lugs) are 5/8" in diameter.
>
> Most Lyc 360s I'm aware of use 1/2" bolts, and the bushings a= re 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 b= ut I've never seen one.
>
> I know that Mark S and Bobby modified their hubs to the larger bushing= s/bolts, to fit their MT electric props.
>
> Bolt circle diameter is the same for all bolt sizes; 320s & 360s.<= br> >
> Charlie
>
> --
> This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus
>
>
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