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  #1  
Old 04-16-2014, 08:44 PM
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Husker'87 Husker'87 is offline
 
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Default IO-540-K1A5D?

I have a line on a IO-540-K1A5D (300 HP) engine. It is a great deal and I am just starting my build. Is there anyone that is using this in their RV-10? I have seen that there may be a issue with the cowl fitting. Just wanted to put a feeler out there to see if it would even work or is it too much trouble. I will be doing some research as well, but I thought I would start with the experts.

Thanks,
John
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  #2  
Old 04-16-2014, 08:54 PM
Kyle Boatright Kyle Boatright is offline
 
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That engine is roughly an inch wider and 60 pounds heavier than the engine Van's spec's for the airplane. I don't know how the extra width would work, but the weight would reduce your useful load and might result in a very forward CG.

Here's a chart that might help you compare O-540's:

http://www.lycoming.com/Lycoming/PRO...ngineData.aspx
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  #3  
Old 04-17-2014, 09:32 AM
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Husker'87 Husker'87 is offline
 
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Quote:
Originally Posted by Kyle Boatright View Post
That engine is roughly an inch wider and 60 pounds heavier than the engine Van's spec's for the airplane. I don't know how the extra width would work, but the weight would reduce your useful load and might result in a very forward CG.

Here's a chart that might help you compare O-540's:

http://www.lycoming.com/Lycoming/PRO...ngineData.aspx
I could put some counter weight in the tail to off set the forward CG if needed, it shouldn't have to be much since it is so far from the datum plane. That can be taken into account during the build. The 540-D and 540-K take the same engine mount, does this mean that the height for the prop would line up the same? What modifications would need to be done because it is about an inch wider?

Thanks,
John
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  #4  
Old 04-17-2014, 10:37 AM
vic syracuse vic syracuse is offline
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Default Weight in Tail :(

Be careful adding weight in the tail to offset heavier engines. It will adversely affect flight characteristics. Yes it might balance, but there is an inertia moment to be dealt with.

Vic
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  #5  
Old 04-17-2014, 03:01 PM
rocketman1988 rocketman1988 is offline
 
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Default Think about mods...

I have found that even simple mods take up tons of time...

Consider that before you make the major mod you are proposing...
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  #6  
Old 04-17-2014, 04:32 PM
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Husker'87 Husker'87 is offline
 
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Quote:
Originally Posted by rocketman1988 View Post
I have found that even simple mods take up tons of time...

Consider that before you make the major mod you are proposing...
That is why I am asking the question. I don't really want to make the mod, but when there is an opportunity to get a deal such as this, it is hard to pass up. I would much rather stay with tried and true, but saving lots of $$$$ makes it tempting.
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  #7  
Old 04-17-2014, 05:14 PM
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You would also have the baffles to deal with. I am
Sure you could make it work, but it would take a lot of time and delay the finish of your project. It is also a consideration for resale. More power is not always better if the kit designer says it will go too fast. I think the biggest issue would be CG, but the time commitment would also be a big deal.
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  #8  
Old 04-17-2014, 05:16 PM
aerhed aerhed is offline
 
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You haven't specified much about this good deal engine. Honestly, I'm not feeling it. I suppose if it were a really good deal you could swap it to an engine builder for something lighter. When you turn from a parallel 540 you start rapidly getting into diminishing returns. Payload, range, money, etc.
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  #9  
Old 04-18-2014, 03:24 AM
Atacamandy Atacamandy is offline
 
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Default IO-540-K1A5D

I just bought a C model that I will send away to be rebuilt into a D model. If you are buying the K model from Art on BARNSTORMERS, I spent a lot of time looking into that core as well. When he removed the wing on his plane he dropped the nose and it hit the ground so hard that it bent the prop in half. Not sure about the US rules but that requires a disassembly in Canada. So buyer be ware, there are no good deals when it comes to your safety.

Andy
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  #10  
Old 04-18-2014, 08:30 AM
659JR 659JR is offline
 
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Default 540K

The K1A5D is also a Large main angle valve and will weigh quite abit more than a IO540C or D parallel valve.

Jesse
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