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Old 02-04-2021, 08:15 PM
Wedge Wedge is offline
Join Date: Dec 2019
Location: Sagle,ID
Posts: 10
Default Wedge’s First Post—Be Gentle

Take a quick look at my shopping list and add the pros and cons for my enlightenment.

My parts list for quick build RV-8:

Lycoming EA XIO-390-A3B6 RT (210hp)
Will use show planes 13 row oil cooler
3 bladed Whirlwind 300 composite prop
Show planes Engine cowling and Fast Back Kit
Sky design landing gear using Matco wheels and brakes
Using Sky Designing new 6.0 wheel fairings
Also using the Condor II fork with pneumatic tire plus the rocket steering link
Live in Idaho and expect a lot of grass landings plus really dislike the skateboard tail wheel. I am a 3 pointer in the Great Lakes!
Got a little spendy with the zip tips from AveoLogistics—wicked cool though!
Using Aerotronics for avionics with a Garmin 375/AP 507/G3 touch screens 10 and 7 inch. Will try to add Picture. Will not be using the Garmin AOA repeater in picture.
Trying to figure out what the huge price difference is between the 375 and the 650/750?
Still have figure out interior lighting and seating. Probably use classic aero for the interior.
Comments are appreciated—need to learn.
Using Synergy Air in Eugene for the builders assist. They are great.
Empennage was done in January and Van’s is suppose to deliver my kit Aprilish!
The Van’s community has been great so far.
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Old 02-04-2021, 08:36 PM
scsmith scsmith is offline
Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,778

You might consider the newer IO-390-EXP 119 engine. A bit more Hp, a bit lighter.

And I would recommend hard-mounting the oil cooler on the firewall with an appropriate bracket, and a fiberglass diffuser/transition from 4" scat to the cooler, with a butterfly valve (throttle valve) on the back of the #4 cylinder baffle.

For sure for sure for sure, put the battery in the back.

Pay attention to all the good modifications, even if it is a QB, you will want to do the gear tower mod for sure. I deterred since mine was a QB and that area was already assembled, and boy I sure wish I had done it.
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet" Flying since Sept. 2009
Hobbs 635
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Dec 2020

Last edited by scsmith : 02-04-2021 at 08:42 PM.
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Old 02-04-2021, 08:56 PM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is offline
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,826

You need to define the mission for the plane.

For example, if you set high efficiency cruise as a top priority, this may not be the best engine choice. If you want a nibble aerobatic plane, this is the wrong engine. If you want a fire breathing time to climb plane this is the right engine.

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Old 02-04-2021, 09:00 PM
Freemasm Freemasm is offline
Join Date: Nov 2017
Location: Orlando
Posts: 287
Default For consideration

First off, I’m not trying to convince anyone that my approach is better. This is another option the OP may wish to consider. I’m having a Titan IO-370 (straight valve Lycoming) being built this month. Between the taller 9.6:1 pistons, better flowing sump, slightly stroked CS, EFI and EI, they’re right at 210 HP. Lots of variables but will probably be 20-30 lbs lighter.

There’s a lot of options. Researching and shopping can be fun. Enjoy
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Old 02-04-2021, 11:46 PM
BobTurner BobTurner is offline
Join Date: Dec 2011
Location: Livermore, CA
Posts: 7,187

Originally Posted by Wedge View Post
Trying to figure out what the huge price difference is between the 375 and the 650/750?
Apples and oranges. 375 is gps + transponder. 650/750 is gps + nav-com.
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Old 02-05-2021, 12:12 AM
Mike S's Avatar
Mike S Mike S is offline
Senior Curmudgeon
Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,709
Default Welcome to VAF

Brent----welcome aboard the good ship VAF
Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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Old 02-05-2021, 03:02 AM
oaklandaviator oaklandaviator is offline
Join Date: Dec 2014
Location: Somerville, Tn and Little Rock, Ar
Posts: 132
Default Tailwheel chains

I much prefer chains on the tailwheel. If they are kept slightly loose, the transition between slow speed flying and tail on the ground steering is much better. I find the Rocket Link to be too stiff and it makes for twitchy steering on the ground. There could be a way to loosen the internal spring though, not sure on that.

I know the link looks good, but chains are simple, easy to adjust, and have worked well for a long time. You might like the tight steering so use what's right for you. I'm putting chains on mine.
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Old 02-05-2021, 10:56 AM is offline
Join Date: Jan 2017
Location: Battle Ground WA
Posts: 148

Welcome Wedge
You forgot something. Go to bank and get a big box of money.
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Old 02-05-2021, 11:15 AM
SMRacer's Avatar
SMRacer SMRacer is offline
Join Date: Feb 2012
Location: Leesburg, VA
Posts: 584
Default Nice airplane

1. If this is your first build, you are greatly complicating the job. But they're nice upgrades. The fastback really makes the RV8 look great. But you then have a flip-over canopy. That's
one of the things I really didn't like about my RV4.
2. The pneumatic tail wheel introduces another point of failure. I've flown my
RV8 about 300 hours off grass and 300 hours off pavement. No problem with either surface with the small tail wheel. Also less weight. Wheel land the RV8.
3. I didn't like the Rocket link. No slack leaves it too twitchy for my taste. Unfortunately now that TailLynx is no longer available there is no good alternative to the ugly hardware store chains.
4. Three blade prop makes getting lower cowl off an even more irritating job. Looks great though. Performance difference will not be as much as you hope. You're already planning a ton of HP.

NOTE: I am NOT a builder. Just relating experiences I've had with airplanes I've owned.
Good luck. You have the makings of a great airplane.
Leesburg, VA (KJYO)
RV4 N444JT (sold)

Last edited by SMRacer : 02-05-2021 at 11:56 AM.
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Old 02-05-2021, 11:41 AM
bjdecker's Avatar
bjdecker bjdecker is offline
Join Date: Jun 2005
Location: Georgetown, TX
Posts: 519

I always liked the Tom Clark fastback/slider over the Showplanes version.
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Brian Decker
Retired Firmware Guy and Airplane Builder

2020 RV-14 QB -- Under construction - Tailcone & Empennage Complete.
2018 RV-7 QB -- Built, Flying
2007 RV-7 QB -- Built, Drowned, Resurrected and flying
1998 RV-8 QB -- Started, Sold
1986 Mooney 205SE
1980 Mooney 231

Aided and abetted building a number of other RV's.
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