Replacement spinner and propeller for the ST Models ASW-28
Here is the data I found out...
I took off my Art-Tech ASK-21 spinner and prop and moved it over. It looks to be a 10.5x6. The spinner diam is 40mm and hub width is 5 or 6mm, but here's the best part, it fits right on to the ASW-28 motorshaft!
The only mod you will need to do is trim the nose foam back about 5-8mm to make up the difference and possibly trim the length of the motorshaft down 5mm to fit the spinner, that's it.
Unfortunately, you can't just run out and just buy these, as they are on backorder through Hobby-Lobby. HK is also selling their own branded version of the Art-Tech ASK-21 and prop/spinner set-up, but no parts are listed. I've got four paid for and ordered, but not sure of the ETA through Hobby-Lobby, will advise.
My plan is to buy an Aeronaut 9x6 prop and file down the prop hubs to fit.
This ASK-21 spinner transforms the look and is very light plastic too.