Purchased a Byron Hellcat that had sat in its orginal kit boxes for 5-6 years, including a Precision Eagle 4.2 with CH Electronic Ignition and Byron 3-blade flyng prop.

I'm getting 3400 RPM tops out of the engine, but have not flown it yet, as I have no documentation on what RPM the engine should be putting out with this prop and have gotten widely differing estimates from various sources.

The engine is running fine from idle through transitions to high end, and over extended run times. It also starts very well (couple flips of the prop w/choke closed, igntion off, followed by one or two flips of the prop w/choke open, igntion on). It runs great, except that it 'seems' like it should have higher RPM. Received documentation was complete (meaning nothing was missing from the kit), but was not helpful on expected performance info.

Perhaps its fine, and its just my ignorance of engines and props in this size range that is giving me grief. Also, I'm using digital tach with a 3-blade setting to measure RPM.

Would appreciate feedback from anyone with actual flying experience with Precision Eagle 4.2/Byron Prop combinations.

Since Iron Bay now owns Byron, perhaps there are 'Iron Bay Pilots' out there now with applicable experience.

Have contacted some of the obvious sources that I should go to for feedback - and this is where the wide range in results is coming from (3000 RPM, 3400 RPM, 5400 RPM, 7000 RPM - the latter is probably for a much smaller, two bladed prop, as its a maximum value I found on a Precision Eagle web page; the 3000 is from the same page).

So if there is someone out there that has run this combo, please let me know what RPM you're getting.

Thank you.