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  #1  
Old 07-21-2018, 12:28 PM
docnorris docnorris is offline
 
Join Date: Jul 2018
Location: Frankfurt
Posts: 2
Default RV-14 anyone flying with Lycoming IO-540 engine?

Hello,
I know there have been several threads about the idea of installing Lycoming IO-540 engine to the RV-14 model.
http://www.vansairforce.com/communit...p?t-98748.html

Still I have not found anyone reporting to have done so. Why is that so important to me?

Because I am searching a KitPlane for myself which allows higher cruising speeds like 250mph, finally I allways end up with Glasair III. But I would like to combine the comfort of the RV-14 and the pre-built advantages of that model with more speed like Glasair 3.

So please consider the following questions:

1.) Is the RV-14 stable enough to handle Cruise Speed of 260mph (considering that Glasair 3 is made of fiber glass that should not be a problem for aluminum RV-14?)

2.) Is it somehow possible to use IO-540 in the RV-14 Kit

3.) Has actually anybody done it and what are the experiences in terms of Speed, stability etc...?

Thank you very much.

Sebastian
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  #2  
Old 07-21-2018, 01:57 PM
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rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
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Turbocharged IO-390 would be way easier and less expensive way to get those speeds. You'd want to do some flutter testing and structural analysis first though to see how feasible it is.
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 424.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


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  #3  
Old 07-21-2018, 04:46 PM
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woodmanrog woodmanrog is offline
 
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Location: Florida
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Van designed the 14 with a v/NE of 200 knots.
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  #4  
Old 07-21-2018, 05:38 PM
docnorris docnorris is offline
 
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Location: Frankfurt
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Yes it might be a solution using Turbo BUT I think the real problem is VNE 200kts!
Vans Aircraft specifically informed about not exceeding this speed because of structural damage, fluttering and decomposition of the aircraft.

https://www.vansaircraft.com/pdf/hp_limts.pdf

Nevertheless I heard that the RV14 was developed with IO-540 engine in its prototype.

Does anyone have the V-N Diagram of the RV-14?

Did anyone actually use a turbo- engine or larger engine in his RV?

Thanks,

Sebastian
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  #5  
Old 07-21-2018, 09:11 PM
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RV8JD RV8JD is offline
 
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Posts: 885
Default Vne in TAS

And that is a Vne of 200 KTS (230 MPH) TAS:

http://www.vansaircraft.com/pdf/lett...4_V_speeds.pdf

The RV-8 has the same Vne. Sometimes it's tough to stay below that Vne when descending from altitude. As an illustration, below is a screenshot from a recent flight in my RV-8. The Dynon SkyView Touch (and others) allows Vne to be input as a TAS value (here in MPH), so it calculates Vne (Redline) in IAS based on Altitude and OAT and displays it on the Speed Tape.



Table:

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Arlington, WA (KAWO)
RV-8, 400 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
(Pic)
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

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Last edited by RV8JD : 07-21-2018 at 09:29 PM.
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  #6  
Old 07-21-2018, 10:50 PM
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rv6ejguy rv6ejguy is offline
 
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Rockets are based on RVs with thicker skins and strengthening in other places. Bill Beaton's supercharged one did some 282 mph laps at Reno, so something close to 300 on the straights, pulling G and in rough air.

Doubtless you could do something similar on an RV14 with a proper testing program but it would be foolish to do this project without that testing in place.

There are several turbocharged RVs and they will all exceed the factory Vne in level flight at medium altitudes. You just have to make sure it's safe and that's going to involve some time and expense to verify.
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 424.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


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  #7  
Old 07-22-2018, 04:59 AM
rvbuilder2002 rvbuilder2002 is offline
 
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Location: Hubbard Oregon
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Quote:
Originally Posted by docnorris View Post

Nevertheless I heard that the RV14 was developed with IO-540 engine in its prototype.
I’m not sure where you would have heard that, because it is not true.
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