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Old 06-19-2018, 12:50 PM
vfrazier's Avatar
vfrazier vfrazier is offline
Join Date: Jan 2007
Location: Mount Vernon, IN
Posts: 1,145

Don't forget to adjust your CG calculations, if needed. Your good judgement required here.

It's easy to end up with a tail heavy RV-4 if you've got a light engine and prop up front.

Just saying.
Vince Frazier
F1 Rocket and F4 Raider components
RV and Rocket Accessories, Tailwheels, Tools, & More
1-888-8FLYBOY (1-888-835-9269)

F4 Raider - under construction
F1-H Rocket "Crazy Horse" - sold
RV-4 "Chief Pontiac" - sold
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Old 06-19-2018, 07:41 PM
RyanB RyanB is offline
Join Date: Sep 2017
Location: South Africa
Posts: 60
Default CG

Very valid point, thank you Vince
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Old 06-20-2018, 04:35 AM
Michael Henning Michael Henning is offline
Join Date: Jun 2011
Location: Nashua, NH
Posts: 526

I was very careful to adjust the datum point after the roll bar was moved back.
RV-4 #2750
WW150C Prop
1018 lbs
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Old 06-23-2018, 06:14 AM
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Lufthans Lufthans is offline
Join Date: Dec 2017
Location: Hilversum, The Netherlands
Posts: 58

Ours is completely stock and I am 6'4".

I simply remove the cushion behind my back when I am flying. No problems whatsoever, and surprisingly comfortable, considering I'm leaving that seat cushion in the hangar...

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Old 06-29-2018, 11:41 AM
Rick RV-4 Rick RV-4 is offline
Join Date: Aug 2006
Posts: 231

I also highly recommend getting a canopy from Todd's Canopies (if it is not too late). Better canopy overall and it will provide an extra 2-4 inches of vertical sitting height for you, as their canopy is molded a little differently.

I'm only 5'10" but using Todd's canopy allowed me to raise my seat height (using Oregon Aero foam) about 2" higher than where I'd sit with a normal Van's canopy. I flew my friends RV-4 the other day and I felt like I was sitting very low and still did not have much room between the top of my headset and the canopy.
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Old 07-01-2018, 08:26 AM
RyanB RyanB is offline
Join Date: Sep 2017
Location: South Africa
Posts: 60
Default Canopy

Thank you Rick, I shall check it out asap
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Old 07-02-2018, 07:12 PM
SJordan SJordan is offline
Join Date: Sep 2016
Location: Scottsdale, AZ
Posts: 194

The -4 I just build has everything pushed around to fit me at 6-4 with a back parachute comfortably and still allow me to fly inverted and not hit the canopy. PM me if you want to talk.

Shawn Jordan
RV4. N11XZ
2018 dues paid.
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Old 07-13-2018, 09:15 PM
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mach25 mach25 is offline
Join Date: Apr 2007
Location: Houston
Posts: 29
Default Seat back

I curved the seat back. That was as tremendous improvement for me. I'm about 6'2".
Jeff Bertsch
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