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  #1  
Old 05-09-2018, 11:39 AM
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kbalch kbalch is offline
 
Join Date: Jan 2005
Location: Clermont, FL
Posts: 128
Default Option purchase timing questions...

Hi All,

Iíve just ordered the -14A empennage and wing kits and have a few questions about whether I should order some of the optional subkits now or wait until later. Mostly thinking about tailcone and wing accessibility issues for these items:

- Autopilot servo install kits (pitch and roll)
- Yaw damper servo install kit
- Magnetometer mounting kit
- Aileron trim kit

Anything else I should be considering at this point? This ought to keep me busy for a few months!

Iím really glad to be rejoining the RV community as an active builder. I loved building and flying my RV-8, have missed it (and hated being a tire-kicker) since the sale some years ago, and canít wait to start work on my new RV-14A.
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RV-8 N118KB (sold)
RV-14A #140494 (Wings in progress)
N114KB (reserved)
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  #2  
Old 05-09-2018, 11:46 AM
control control is offline
 
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Location: Stockholm, Sweden
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No hurry to buy the stuff you list, you have lots to do before it is time to rivet the bottom skins on the wings. Even after completing the empennage kit, you have easy access until you have it join the fuselage.

If you intent to use another pitot solution then that is also something to order before closing the wings.
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  #3  
Old 05-09-2018, 12:13 PM
mturnerb mturnerb is offline
 
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Ken:

See PM. Give me a call - I'm pretty far along in my project and not too far from you. Happy to host you and walk you through how I've approached these sorts of questions and share what I've learned along the way as well as review my many mistakes....

Turner B
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  #4  
Old 05-09-2018, 01:03 PM
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rleffler rleffler is offline
 
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Location: Delaware, OH (KDLZ)
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Quote:
Originally Posted by kbalch View Post
Hi All,

Iíve just ordered the -14A empennage and wing kits and have a few questions about whether I should order some of the optional subkits now or wait until later. Mostly thinking about tailcone and wing accessibility issues for these items:

- Autopilot servo install kits (pitch and roll)
- Yaw damper servo install kit
- Magnetometer mounting kit
- Aileron trim kit

Anything else I should be considering at this point? This ought to keep me busy for a few months!

Iím really glad to be rejoining the RV community as an active builder. I loved building and flying my RV-8, have missed it (and hated being a tire-kicker) since the sale some years ago, and canít wait to start work on my new RV-14A.
Personally, I would hold off on those decisions. They are going to be tightly coupled to your EFIS decision. I thought I knew which EFIS I was going to buy 80% through my build. Technology and opportunities changed and I made a decision to switch vendors. You don't need those items until the end of your build. Also, you don't want to install the previous technology offering in your favorite vendor comes out with something new during your build.
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  #5  
Old 05-09-2018, 02:00 PM
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kbalch kbalch is offline
 
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Location: Clermont, FL
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Quote:
Originally Posted by rleffler View Post
Personally, I would hold off on those decisions. They are going to be tightly coupled to your EFIS decision. I thought I knew which EFIS I was going to buy 80% through my build. Technology and opportunities changed and I made a decision to switch vendors. You don't need those items until the end of your build. Also, you don't want to install the previous technology offering in your favorite vendor comes out with something new during your build.
I definitely hear what you're saying. My intent right now is go with the Garmin G3X system and I've already been in touch with SteinAir for an initial quote. I'll certainly be keeping an eye on avionics developments, though I intend to move right along with the project and am planning to order the panel in November (given the 7-month lead time on delivery).
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RV-8 N118KB (sold)
RV-14A #140494 (Wings in progress)
N114KB (reserved)
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  #6  
Old 05-09-2018, 03:52 PM
asw20c asw20c is offline
 
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Location: Edgewood, NM
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Wow. That's truly ambitious regarding your expected timeline. I started on my wings in April last year after finishing the empennage in about 5 months. Based on that first kit I thought it would be no problem to finish the wings by Christmas. Boy, was that wishful thinking! I'm now into my 13th month on the wings and figure I'm about 2 weeks out from closing up the fuel tanks. Still have ailerons, flaps, wiring, pitot, magnetometer mount, servo mounts, control linkages, etc. left to go before the wings are done. Now I'm hoping to have the wings done in less than 18 months!
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  #7  
Old 05-09-2018, 06:01 PM
Aviator Aviator is offline
 
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Kbalch, I would slow down a bit. It does take longer than one anticipates. There are times during the build that you will "take time off". Sometimes months long to take care of life around you.
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  #8  
Old 05-09-2018, 06:14 PM
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kbalch kbalch is offline
 
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I may be overestimating the build speed, but I built an early RV-8 from a standard kit in 29 months. Allowing for the substantial kit improvements, I'm hoping for 18 months with the RV-14A.

We'll see how it goes... :-)
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RV-8 N118KB (sold)
RV-14A #140494 (Wings in progress)
N114KB (reserved)
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  #9  
Old 05-09-2018, 10:22 PM
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czechsix czechsix is offline
 
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Location: Spring Hill, KS
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Quote:
Originally Posted by kbalch View Post
I may be overestimating the build speed, but I built an early RV-8 from a standard kit in 29 months. Allowing for the substantial kit improvements, I'm hoping for 18 months with the RV-14A.
Ken, I built an RV-8A slow build in the pre matched hole days (outer skins prepunched but substructure was not so I had to build jigs for everything). Having now built the empennage and wings and started on the fuselage of the 14A, it is actually taking more build hours for each part than the 8A did. Yes the 14 kit is more advanced with no jigs required, but it is also a larger more complicated airframe with significantly higher parts count than the -8. Sometimes I scratch my head and wonder what Vans was thinking...the trailing edges for example are WAY more work than the simple bent edges on the -8. Lots more ribs and J-channel stiffeners in both wings and fuselage. Two spars in each elevator plus you've got to bond in foam ribs. The vertical stab is about the only part that is really comparable to the -8, but the fit of the fiberglass on the stab and rudder are worse than the -8.

I do expect the canopy to go more quickly, and if you use all the stock FWF stuff and premade wire harnesses the are some areas that will offset the more time-consuming airframe, but overall I don't think you'll find the build time to be any faster than the -8, and probably a bit longer.
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RV-8A N2D #80583 - built/flew/sold
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  #10  
Old 05-10-2018, 08:44 AM
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kbalch kbalch is offline
 
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Location: Clermont, FL
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Quote:
Originally Posted by czechsix View Post
Ken, I built an RV-8A slow build in the pre matched hole days (outer skins prepunched but substructure was not so I had to build jigs for everything). Having now built the empennage and wings and started on the fuselage of the 14A, it is actually taking more build hours for each part than the 8A did. Yes the 14 kit is more advanced with no jigs required, but it is also a larger more complicated airframe with significantly higher parts count than the -8. Sometimes I scratch my head and wonder what Vans was thinking...the trailing edges for example are WAY more work than the simple bent edges on the -8. Lots more ribs and J-channel stiffeners in both wings and fuselage. Two spars in each elevator plus you've got to bond in foam ribs. The vertical stab is about the only part that is really comparable to the -8, but the fit of the fiberglass on the stab and rudder are worse than the -8.

I do expect the canopy to go more quickly, and if you use all the stock FWF stuff and premade wire harnesses the are some areas that will offset the more time-consuming airframe, but overall I don't think you'll find the build time to be any faster than the -8, and probably a bit longer.
Hi Mark,

Thanks for the detailed reply. Sounds as though we built the same generation -8/-8A kit. Mine was #81125 - I started 12/99 and made the first flight 5/02. I seem to recall that I was the 203rd -8 to fly and something like the 2900th RV overall.

I had exactly the same thought re: trailing edges. The bent ones were easy to do and performed perfectly. I've no idea why Van's went to the current version. I'm planning to utilize some (not all) of the stock FWF components and many of the premade harnesses (I'll order my main fuselage harness directly from Stein to include necessary customizations). I hear you on the larger airframe, higher parts count, etc.

Ultimately, of course, it'll be done when it's done, though I'm planning to hold onto my foolish optimism for awhile yet...
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RV-8 N118KB (sold)
RV-14A #140494 (Wings in progress)
N114KB (reserved)
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