I have an 18 gal tank in my 172-D, I have a 220 hp Franklin and I fly floats, I love the tank it gives me s little more distance. I think it is a Javelin tank. It is in winter storage so I dont have the STC.
it is very popular in Alaska
I'm looking for a javelin aux. tank (baggage compartment tank). If you have one or know of anyone that has one for sale please contact me. Cell phone # 907-378-3993.