and his mention of this got me thinking along the same lines as the discussion here - mission profile, cost and complexity, added value, safety of deviating from Van's fuel system design, polar moment of inertia in spins, stress, CG - all of it.
I'm not yet rated for IFR but hope to be someday - older, less moneyed and more intimidated pilots than myself have conquered the rating. The comments about IFR reserves to alternates being very tight on 60 gallons are thought-provoking. I've always fancied my RV-10 as purpose-built for one primary mission - getting me and family/friends to the Outer Banks and back (1:40 each way) on sunny clear days - and 60 gallons at 10.5 gph LOP seemed plenty adequate for the task using only my own fuel farm for resupply. But the truth is there will always be longer trips and unforeseen destinations calling, and I want to be sure my thinking is sufficiently future-proof. Life does change.
I'm about finished with installation of piano hinge in both wingtips for mounting - wanted that slick, no-screws look, and to avoid the frequent use of EZ-outs on stripped #6 Phillips screws, as is common necessity anymore on my per-plans 6A wingtips. That gets old so fast. Now here I am pondering the addition of tip tanks at a stage when I probably just made it a lot more difficult, although part of that bridge was crossed when the previous builder riveted on the leading edges of my partially built wings!
Long ago I fabbed baggage-area fuel tanks for my RANS S-12 using a fuel-proof resin and fiberglass, and they worked well (the standard polyethylene roto-molded wing tanks were famous for leaking). I'm not seeing a SafeAir website anymore - perhaps they have closed their doors? Anyway, musing here about making the tips themselves into tanks with proper application of fuel-proof resin and installation of baffles and fittings, fill cap.
Anyone done this? The nav light lens could double as a sight-glass fuel gauge
Okay, not serious there. Not planning any wingtip antennas, though. Also curious if a Facet fuel pump in series with a tip tank supply line to the main tank would prevent downhill fuel transfer from tip to main tank when not powered on.
Hop-Along Aerodrome (12VA)
RV-6A - N30YD - flying since '98
RV-10 - N130YD reserved - under construction
donating monthly to the VAF - thanks, Doug