Originally Posted by roadrunner20
IO360, 2005 catto 3 blade
Here's my morphed 7A to 7 data
7A CG = 81.88, empty weight 1081
7 CG = 81.11, empty weight 1065
Since I will be installing the landoll ring, I was looking at the data today, my cg moved forward on the conversion.
The 12# ring will help, but I will also keep my lead scuba bean bags on my inside firewall. I created a dam to hole them forward.
Interesting indeed. The CG change data is counterintuitive to me.
On the assumption that there were not any other items relocated unrelated to the 7A to 7 change, the CG moving forward indicates that the main gear relocation has a major effect on CG position between the 7 and 7A.
The nose gear removal and tail wheel addition are both "rearward CG" moves so the main gear repositioning had to more than compensate for both of them.
I have had recent "idle" thoughts about converting to a 7. It will take a mighty big "round tuit" though.
When I was building 7A 10 years ago, I had seen posts about rear CG tendency but I did not realize it was the taildragger being described. I pushed everything forward during construction and have an empty CG of 78.7" which is quite far forward. It is essentially impossible for me to load the craft out the back of the envelope. Downside is my nosewheel weight is high although still within Vans limits in all loading scenarios.
7A unpainted tip up
IFR Glass w/ steam BU
Some fabric interior by SWMBO
78.7 empty CG
RV-7A: Flying since April 15, 2012. 550hrs
YIO-360-M1B, mags, CS, GRT H1s & A/P, Navworx
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