Today's Message Index:
----------------------
1. 07:23 AM - Re: Re: C of G range (Nancy and Randy)
2. 05:10 PM - Re: Re: C of G range (Vern Little)
3. 07:10 PM - Re: Re: C of G range (Kevin DeVan)
Message 1
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| Subject: | Re: C of G range |
Vern,
Glad to help. Good luck on getting her airborne. Fly Safe!
Randy
----- Original Message -----
From: "Vern Little" <sprocket@vx-aviation.com>
Sent: Sunday, June 23, 2013 2:18 PM
Subject: Re: Rocket-List: Re: C of G range
> <sprocket@vx-aviation.com>
>
> Hi Randy, thanks for this.
> My research has shown that the RV-4 wing uses 15-30 percent MAC which is
> 88.7 to 97.4 inches aft of datum.
> I've seen the 86.7 and 87.7 forward limit in some F1 cases (larger tail),
> but this is quite an outlier. Virtually all loading cases can fit within
> the 88.7 limit (155 lb pilot, zero fuel is at the limit in my case). Note
> that fuel moment arm is AFT of the forward limit, so the C of G moves
> forward as fuel is burned in this scenario!
>
> The only traceable engineering source is the RV-4 manual and I'm happy
> with the choice off 88.7 for the forward limit. Everyone agrees on the
> aft limit!
>
> Thanks again for the feedback,
> Vern
>
> -----Original Message-----
> From: viperpilot
> Sent: Sunday, June 23, 2013 9:05 AM
> To: rocket-list@matronics.com
> Subject: Rocket-List: Re: C of G range
>
>
> The latest information I have is a CG range of 86.7 inches to 97.4 inches
> aft of the "Datum". The "Datum" is 80.0 inches forward of the wing
> leading edge. Source of the information is John Harmon at
> harmonrocket@aol.com . Hope that helps. Feel free to email me at
> viperplt@comcast.net if you have any further questions.
>
> Tailwinds,
> Randy Sage
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=403207#403207
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
>
>
>
Message 2
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| Subject: | Re: C of G range |
First engine start was today, no problem except for the prop governor
working in reverse (sigh).
Thanks, V
-----Original Message-----
From: Nancy and Randy
Sent: Monday, June 24, 2013 7:22 AM
Subject: Re: Rocket-List: Re: C of G range
Vern,
Glad to help. Good luck on getting her airborne. Fly Safe!
Randy
----- Original Message -----
From: "Vern Little" <sprocket@vx-aviation.com>
Sent: Sunday, June 23, 2013 2:18 PM
Subject: Re: Rocket-List: Re: C of G range
> <sprocket@vx-aviation.com>
>
> Hi Randy, thanks for this.
> My research has shown that the RV-4 wing uses 15-30 percent MAC which is
> 88.7 to 97.4 inches aft of datum.
> I've seen the 86.7 and 87.7 forward limit in some F1 cases (larger tail),
> but this is quite an outlier. Virtually all loading cases can fit within
> the 88.7 limit (155 lb pilot, zero fuel is at the limit in my case). Note
> that fuel moment arm is AFT of the forward limit, so the C of G moves
> forward as fuel is burned in this scenario!
>
> The only traceable engineering source is the RV-4 manual and I'm happy
> with the choice off 88.7 for the forward limit. Everyone agrees on the
> aft limit!
>
> Thanks again for the feedback,
> Vern
>
> -----Original Message-----
> From: viperpilot
> Sent: Sunday, June 23, 2013 9:05 AM
> To: rocket-list@matronics.com
> Subject: Rocket-List: Re: C of G range
>
>
> The latest information I have is a CG range of 86.7 inches to 97.4 inches
> aft of the "Datum". The "Datum" is 80.0 inches forward of the wing
> leading edge. Source of the information is John Harmon at
> harmonrocket@aol.com . Hope that helps. Feel free to email me at
> viperplt@comcast.net if you have any further questions.
>
> Tailwinds,
> Randy Sage
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=403207#403207
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
>
>
-----
No virus found in this message.
Checked by AVG - www.avg.com
Message 3
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| Subject: | Re: C of G range |
Congratulations Vern!
Thanks,
Kevin
On Jun 24, 2013, at 5:13 PM, "Vern Little" <sprocket@vx-aviation.com> wrote:
>
> First engine start was today, no problem except for the prop governor working
in reverse (sigh).
>
> Thanks, V
>
> -----Original Message----- From: Nancy and Randy
> Sent: Monday, June 24, 2013 7:22 AM
> To: rocket-list@matronics.com
> Subject: Re: Rocket-List: Re: C of G range
>
>
> Vern,
>
> Glad to help. Good luck on getting her airborne. Fly Safe!
>
> Randy
> ----- Original Message ----- From: "Vern Little" <sprocket@vx-aviation.com>
> To: <rocket-list@matronics.com>
> Sent: Sunday, June 23, 2013 2:18 PM
> Subject: Re: Rocket-List: Re: C of G range
>
>
>>
>> Hi Randy, thanks for this.
>> My research has shown that the RV-4 wing uses 15-30 percent MAC which is 88.7
to 97.4 inches aft of datum.
>> I've seen the 86.7 and 87.7 forward limit in some F1 cases (larger tail), but
this is quite an outlier. Virtually all loading cases can fit within the 88.7
limit (155 lb pilot, zero fuel is at the limit in my case). Note that fuel
moment arm is AFT of the forward limit, so the C of G moves forward as fuel is
burned in this scenario!
>>
>> The only traceable engineering source is the RV-4 manual and I'm happy with
the choice off 88.7 for the forward limit. Everyone agrees on the aft limit!
>>
>> Thanks again for the feedback,
>> Vern
>>
>> -----Original Message----- From: viperpilot
>> Sent: Sunday, June 23, 2013 9:05 AM
>> To: rocket-list@matronics.com
>> Subject: Rocket-List: Re: C of G range
>>
>>
>> The latest information I have is a CG range of 86.7 inches to 97.4 inches aft
of the "Datum". The "Datum" is 80.0 inches forward of the wing leading edge.
Source of the information is John Harmon at harmonrocket@aol.com . Hope that
helps. Feel free to email me at viperplt@comcast.net if you have any further
questions.
>>
>> Tailwinds,
>> Randy Sage
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=403207#403207
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>
>
>
>
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
>
>
>
>
>
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