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  #1  
Old 02-18-2012, 07:38 PM
Alschief Alschief is offline
 
Join Date: Jan 2005
Location: Anderson MO
Posts: 434
Default New UL Power Engine Mount

We just received the shorter Mount from Russ at http://mccutcheonmetalfabricationaviation.com.
Excellent workmanship, fits like a glove.

Next step is do a weight and balance to confirm the new CG.
link to the pictures https://picasaweb.google.com/1116907...rapbookPhotos#
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AL & Brenda Smith
RV12, UL Power N495BA Flying
RV6 N495AB Sold
KEOS Neosho, MO
alsmith@olemac.net
alsmith@ulpower.com

Last edited by Alschief : 02-18-2012 at 07:55 PM.
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  #2  
Old 02-18-2012, 09:50 PM
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Russ McCutcheon Russ McCutcheon is offline
 
Join Date: Oct 2005
Location: Vancouver, WA USA
Posts: 908
Default

Thanks for the kind words AL, it was a fun project, I’m glad you asked me and I was happy to help you with it, I look forward to hearing your W&B results. There are more photos up on the website for anyone interested in looking.
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russmccutcheon@gmail.com
We build many of your RV weldments.

Last edited by Russ McCutcheon : 02-19-2012 at 01:10 PM.
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  #3  
Old 02-19-2012, 11:13 AM
Alschief Alschief is offline
 
Join Date: Jan 2005
Location: Anderson MO
Posts: 434
Default New UL Mount Weight and Balance

We just weighed our RV 12 with the UL 260Is engine.
The new mount is 5" shorter
Avionics, flight instruments, baffling, cowling and seats were included.
The weights do not include the final wiring.


Total 693 lbs Empty CG 80.42"
Nose 144 lbs
Left Main 268 lbs
Right Main 280 lbs
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AL & Brenda Smith
RV12, UL Power N495BA Flying
RV6 N495AB Sold
KEOS Neosho, MO
alsmith@olemac.net
alsmith@ulpower.com
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  #4  
Old 02-19-2012, 12:28 PM
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rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
Default

Glad to see you are taking the steps to properly engineer the engine installation Al (even if it means some backing up - redo).

Is that weight also with engine oil and propeller?
If so, the weight is looking very good.

I am also wondering about battery power for the ignition. Does UL recommend a separate back-up battery for the ignition system that is isolated from the rest of the electrical system, that would keep the engine running in the case of a total electrical failure?
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  #5  
Old 02-19-2012, 03:14 PM
Russ McCutcheon's Avatar
Russ McCutcheon Russ McCutcheon is offline
 
Join Date: Oct 2005
Location: Vancouver, WA USA
Posts: 908
Default

Quote:
Originally Posted by Alschief View Post
We just weighed our RV 12 with the UL 260Is engine.
The new mount is 5" shorter
Avionics, flight instruments, baffling, cowling and seats were included.
The weights do not include the final wiring.


Total 693 lbs Empty CG 80.42"
Nose 144 lbs
Left Main 268 lbs
Right Main 280 lbs
Hi AL,

For myself and others who don?t know the RV-12 W & B, is this where you were hoping to end up?
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@rv4welder on Facebook
russmccutcheon@gmail.com
We build many of your RV weldments.
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  #6  
Old 02-19-2012, 04:51 PM
Alschief Alschief is offline
 
Join Date: Jan 2005
Location: Anderson MO
Posts: 434
Default Redesigned UL Power Engine Mount

Reference the question on the CG Range

The established CG Range is 80.49 to 85.39. At his time we are just slightly forward of the limit.


Quote:
Originally Posted by rvbuilder2002 View Post
Glad to see you are taking the steps to properly engineer the engine installation Al (even if it means some backing up - redo).

Is that weight also with engine oil and propeller?
If so, the weight is looking very good.

I am also wondering about battery power for the ignition. Does UL recommend a separate back-up battery for the ignition system that is isolated from the rest of the electrical system, that would keep the engine running in the case of a total electrical failure?

Yes, the weight includes oil (In the Containers at the correct ARM) and the propeller.

UL does not make a backup battery recommendation, however we intend to provide an alternate battery source.
UL offers dual fuel pumps which we have installed. Redundant ignitions are part of the package we are installing.
UL Power does offer a second ECU which we have not decided to purchase at this time.

I may have not been clear on my initial post concerning the direction we are proceeding.
This is a fine kit that we have an opportunity to explore a different propulsion system.
We intend to take the steps necessary to make this a properly engineered installation.
We had always understood that changes would be necessary to stay within the flight envelope and established practices.
The original mount was our first attempt to establish a base line then to proceed forward.

We value the observations and input from the community, please keep them coming
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AL & Brenda Smith
RV12, UL Power N495BA Flying
RV6 N495AB Sold
KEOS Neosho, MO
alsmith@olemac.net
alsmith@ulpower.com
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  #7  
Old 02-19-2012, 04:59 PM
splitty splitty is offline
 
Join Date: Dec 2007
Location: Hervey Bay Queensland Australia
Posts: 205
Default Engine

Thanks for all the work you are putting into this for us there Al. I'm sure there will be more people interested in this engine installation as you get airborne! I know I sure am!
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  #8  
Old 02-20-2012, 04:39 PM
splitty splitty is offline
 
Join Date: Dec 2007
Location: Hervey Bay Queensland Australia
Posts: 205
Smile Ul engine Option

Al not haveing seen a RV12 but is there a possibility of mounting the twin fuel pumps & Filters and associate plumbing under the floor in the fuel tank area to help with the COG Question?? Just a suggestion mate .......
Cheers & keep up the great work!
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  #9  
Old 02-20-2012, 07:13 PM
Alschief Alschief is offline
 
Join Date: Jan 2005
Location: Anderson MO
Posts: 434
Default Fuel Pump Location

Quote:
Originally Posted by splitty View Post
Al not having seen a RV12 but is there a possibility of mounting the twin fuel pumps & Filters and associate plumbing under the floor in the fuel tank area to help with the COG Question?? Just a suggestion mate .......
Cheers & keep up the great work!
It might work there, however the area also has the push pull tubes and the original low pressure fuel pump.
The forward tunnel area where the Fuel flow sender and fuel valve are located might be better location.
We decided to minimize the exposure to high pressure (43 PSI) fuel to outside of the cockpit.
We are leaving the low pressure fuel pump that is mounted adjacent to the fuel tank as a potential boost source.
f we need more aft CG a shorter mount could be constructed as there is still additional room between the engine and firewall.

Thanks for the question
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AL & Brenda Smith
RV12, UL Power N495BA Flying
RV6 N495AB Sold
KEOS Neosho, MO
alsmith@olemac.net
alsmith@ulpower.com
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  #10  
Old 02-21-2012, 03:17 PM
kmtck kmtck is offline
 
Join Date: Jan 2012
Location: Dallas
Posts: 10
Default lightest RV12!

Al at 693lbs without paint, you are probably the lightest RV12. I know there is one that is about 700lbs and the jabiru2200 powered 12 is 705 lbs.
You definitely build light. I think this is excellent.

The cg @80.42" is pretty good too considering it will move aft and very likely withing the limits after paint. Did you use the Avionics kit from Vans or your own panel?

Looking good.

Rahul

Quote:
Originally Posted by Alschief View Post
We just weighed our RV 12 with the UL 260Is engine.
The new mount is 5" shorter
Avionics, flight instruments, baffling, cowling and seats were included.
The weights do not include the final wiring.


Total 693 lbs Empty CG 80.42"
Nose 144 lbs
Left Main 268 lbs
Right Main 280 lbs
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