Today's Message Index:
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1. 01:22 PM - MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fixed Pitch Metal Propeller (George Nielsen)
2. 02:38 PM - Re: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fixed Pitch Metal Propeller (Warren Brecheisen)
3. 03:00 PM - Re: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fixed Pitch Metal Propeller (bigdog@bentwing.com)
4. 05:49 PM - Re: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fixed Pitch Metal Propeller (Charlie England)
5. 09:46 PM - Re: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fixed Pitch Metal Propeller (bigdog@bentwing.com)
Message 1
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| Subject: | MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fixed |
Pitch Metal Propeller
Does anyone have a Pilot's Operating Handbook which shows the take-off
weights of an RV-6 with a Lycoming O-320-D3G engine and a 79" Sensenich
Fixed Pitch Metal Propeller? I need these to justify to the aviation
administration an increase in the take-off weight of my RV-6. At present
it is rated at 726 kg which is equal to 1600 lbs. Based on my aircraft's
performance at this weight I find that an increase in MTOW would be
appropriate.
Thank you.
George Nielsen
RV-6 PH-XGN
The Hague, the Netherlands
Message 2
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| Subject: | Re: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich |
Fixed Pitch Metal Propeller
Van's originally specified 1600 lb gross for the RV-6, increased it to 1650 for
the RV-6A. During the inspection of my RV-6 I called Van's and let the DAR talk
to them. They said they would approve 1650 so that's what mine is rated for.
I haven't followed what's happened with Van's specs since. The above happened
in 2007 and it meant the difference between just carrying two people and
carrying two people with some luggage.
Warren
> On Jan 6, 2014, at 3:21 PM, George Nielsen <genie@swissmail.org> wrote:
>
>
> Does anyone have a Pilot's Operating Handbook which shows the take-off weights
of an RV-6 with a Lycoming O-320-D3G engine and a 79" Sensenich Fixed Pitch
Metal Propeller? I need these to justify to the aviation administration an increase
in the take-off weight of my RV-6. At present it is rated at 726 kg which
is equal to 1600 lbs. Based on my aircraft's performance at this weight I find
that an increase in MTOW would be appropriate.
>
> Thank you.
>
> George Nielsen
> RV-6 PH-XGN
> The Hague, the Netherlands
>
>
>
>
Message 3
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| Subject: | MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich |
Fixed Pitch Metal Propeller
What aspect do you need to justify? Performance or structure or both or just that someone else has done it? If performance, what standard has to be met? An RV will beat most factory airplanes at almost any weight. I don't know if Van's has ever admitted to more than 1650 for the RV-6 but the RV-7/a shows an 1800 lb GW and its structure is IMHO weaker than the -6. If the RV-7 analogy works then just point to Van's web site. http://www.vansaircraft.com/public/rv7specs.htm
Regards,
Greg Young
-----Original Message-----
From: owner-rv6-list-server@matronics.com [mailto:owner-rv6-list-server@matronics.com] On Behalf Of George Nielsen
Sent: Monday, January 06, 2014 3:22 PM
Subject: RV6-List: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fixed
Pitch Metal Propeller
Does anyone have a Pilot's Operating Handbook which shows the take-off weights
of an RV-6 with a Lycoming O-320-D3G engine and a 79" Sensenich Fixed Pitch Metal
Propeller? I need these to justify to the aviation administration an increase
in the take-off weight of my RV-6. At present it is rated at 726 kg which
is equal to 1600 lbs. Based on my aircraft's performance at this weight I find
that an increase in MTOW would be appropriate.
Thank you.
George Nielsen
RV-6 PH-XGN
The Hague, the Netherlands
Message 4
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| Subject: | Re: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich |
Fixed Pitch Metal Propeller
What analysis did you use to arrive at the opinion that the -7's
structure is weaker than the -6?
Charlie
On 1/6/2014 5:00 PM, bigdog@bentwing.com wrote:
>
> What aspect do you need to justify? Performance or structure or both or just that someone else has done it? If performance, what standard has to be met? An RV will beat most factory airplanes at almost any weight. I don't know if Van's has ever admitted to more than 1650 for the RV-6 but the RV-7/a shows an 1800 lb GW and its structure is IMHO weaker than the -6. If the RV-7 analogy works then just point to Van's web site. http://www.vansaircraft.com/public/rv7specs.htm
>
>
> Regards,
> Greg Young
>
> -----Original Message-----
> From: owner-rv6-list-server@matronics.com [mailto:owner-rv6-list-server@matronics.com] On Behalf Of George Nielsen
> Sent: Monday, January 06, 2014 3:22 PM
> To: rv6-list@matronics.com
> Subject: RV6-List: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fixed
Pitch Metal Propeller
>
>
> Does anyone have a Pilot's Operating Handbook which shows the take-off weights
of an RV-6 with a Lycoming O-320-D3G engine and a 79" Sensenich Fixed Pitch
Metal Propeller? I need these to justify to the aviation administration an increase
in the take-off weight of my RV-6. At present it is rated at 726 kg which
is equal to 1600 lbs. Based on my aircraft's performance at this weight I find
that an increase in MTOW would be appropriate.
>
> Thank you.
>
> George Nielsen
> RV-6 PH-XGN
> The Hague, the Netherlands
>
Message 5
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| Subject: | MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich |
Fixed Pitch Metal Propeller
Observation, personal experience and engineering judgment - my opinion only, not
from calculation. The wing spar and attachment to the fuselage differ. The -6
spar is multiple layers of bar stock with the two wings joined at the center
with 4, 1/4" steel splice plates. That makes it effectively a one piece wing
with the -605 bulkhead bolted to it all the way across the width. I think it's
74 bolts. The -7 uses the -8 style spar with stubs that mount into boxes in the
fuselage using 4, albeit large, bolts in each. I have experienced trying to
wrap the -6 spar around a tree and believe the center section will not bend under
any load my body can withstand. The -8, and I assume -7, has a hole outboard
for the aileron push rod. I believe it got beefed up after the -8 demo plane
loss but again it is different from the -6. The firewall structure of the -7
has only one diagonal on each side instead of the "X" braces on the -6. The
rest of the fuselage and tail are effectively the same other than for differences
going to matched hole CAD parts.
Perhaps using "weaker" was a poor choice of words. Is the -7 structure adequate?
Yes. Does the -6 structure provide more margin? IMHO, yes. If 1800 lbs GW is
OK for the -7, should it be OK for the -6. Again, IMHO, yes. FWIW I set my -6
GW at 1900 lbs so I'd always be legal as long as I felt I was operating safely.
Regards,
Greg
-----Original Message-----
From: owner-rv6-list-server@matronics.com [mailto:owner-rv6-list-server@matronics.com] On Behalf Of Charlie England
Sent: Monday, January 06, 2014 7:50 PM
Subject: Re: RV6-List: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fixed
Pitch Metal Propeller
What analysis did you use to arrive at the opinion that the -7's structure is weaker
than the -6?
Charlie
On 1/6/2014 5:00 PM, bigdog@bentwing.com wrote:
> --> <bigdog@bentwing.com>
>
> What aspect do you need to justify? Performance or structure or both
> or just that someone else has done it? If performance, what standard
> has to be met? An RV will beat most factory airplanes at almost any
> weight. I don't know if Van's has ever admitted to more than 1650 for
> the RV-6 but the RV-7/a shows an 1800 lb GW and its structure is IMHO
> weaker than the -6. If the RV-7 analogy works then just point to Van's
> web site. http://www.vansaircraft.com/public/rv7specs.htm
>
>
> Regards,
> Greg Young
>
> -----Original Message-----
> From: owner-rv6-list-server@matronics.com
> [mailto:owner-rv6-list-server@matronics.com] On Behalf Of George
> Nielsen
> Sent: Monday, January 06, 2014 3:22 PM
> To: rv6-list@matronics.com
> Subject: RV6-List: MTOW of RV-6 with Lycoming O-320-D3G and 79"
> Sensenich Fixed Pitch Metal Propeller
>
>
> Does anyone have a Pilot's Operating Handbook which shows the take-off weights
of an RV-6 with a Lycoming O-320-D3G engine and a 79" Sensenich Fixed Pitch
Metal Propeller? I need these to justify to the aviation administration an increase
in the take-off weight of my RV-6. At present it is rated at 726 kg which
is equal to 1600 lbs. Based on my aircraft's performance at this weight I find
that an increase in MTOW would be appropriate.
>
> Thank you.
>
> George Nielsen
> RV-6 PH-XGN
> The Hague, the Netherlands
>
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