The stock TD .020 with that brand prop does allows it to unload at the expense of some thrust being only 3.3in dia. Steep dives do scream with the 3.15 pitch with enough load to keep in a safe rpm range at least thus far for the engine.
The posted footage was done keeping things more level on the passes by the cam. Its tough to radar this one I need assistance or learn to deal with it with a quick left handed read. I feel stuck on the sticks at all times do to size. Downwind leveled off that day was with a 8-10 mph winds looks like upper 60's. Cross wind looks to be in the mid 50's. Temp was 87 deg, with 25% nitro. No way will I get 80 out of this one.
What has been learned based on the design;
Need the engine mods,
reduction in span (17in)
trim down the tail feathers,
rolled fuselage with a nose to cowl the engine
Could get 80 mph level flight with a 3 x 3.5 pitch at 29k. gives you 96.2 mph /16 mph drag loss which is still wishful thinking to see 80.
On the bright side its the fastest 3ch stock TD .020 I have ever flown or observed.