I fly a Piper Super Cub 180HP with upgraded 61 gallons, 30.5 gallons usable a side. The POH and everywhere I look online I find POHs for Cubs with 150hp and 36 gallons TOTAL. I was wondering if anyone knew where to find the speeds for this upgraded Super Cub?

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    $\begingroup$ Isn't this part of the STC documentation when the mod was performed? I believe it's required to be an addendum to the POH... $\endgroup$
    – Ron Beyer
    Commented Sep 30, 2021 at 23:15
  • $\begingroup$ There should be an addendum to the POH, however, the other flight characteristics didn't change, so you could calculate them yourself using a current weighing report. $\endgroup$
    – Robb
    Commented Oct 1, 2021 at 6:25
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    $\begingroup$ Before you even get that far, does the STC for the bigger engine and extra fuel include a gross wt increase? (usually this is not the case because it would require the STC maker to do a ton of testing) If there is no GW increase, you will use the regular numbers. Or, perhaps this airplane is a Wag Aero homebuilt Super Cub? If that's the case, the builder should have created a POH and if not you are on your own. $\endgroup$
    – John K
    Commented Oct 1, 2021 at 14:47


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