Hotend test initial results

I've tested and tested and tested. I'm bored of testing and I still need to test a stock e3dV6 with their stock cooler but need to make a firmware and load it onto a random board to test because the prusa Einsy has 5V fan output only and I need 12/24V...

Stock Prusa R5 Extruder body used on all tests and modified to fit each hotend correctly. Ambient temperature was always 17C. All hotends minus Phaetus and Mosquito had 5 separate tests while those two had 4 tests each these are the averages of those tests.

So what are the results:

1a. Slice Mosquito

w/ Noctua Fan: 40.2C
w/ Sunon Fan: 32.86C

1b. Slice Copperhead

w/ Noctua Fan: 39.02C
w/ Sunon Fan: 35.04C

2. Phaetus Dragon

w/ Noctua Fan: 42.37C
w/ Sunon Fan: 38.9C

3. e3dV6 w/ titanium heatbreak

w/ Noctua Fan: 43.12C
w/ Sunon Fan: 40.4C

4. e3dV6 stock heatbreal

w/ Noctua Fan: 48.16C
w/ Sunon Fan: 43.02C

Whats next?? Stock e3dV6 with their fan, Bear extruder with stock e3dV6, and possibly other hotends as I can get my hands on them. 

What do we know from these results? Prusa MK3s R5 extruder + Noctua + stock e3dV6 is very close to critical range of clogging with materials with low glass transition temp like PLA and HTPLA. Swapping to a titanium heatbreak or getting a Sunon fan gets us much closer to usable temps with some headroom. 

The interesting bits is just how good the designs are from Slice and Phaetus. Slice being the clear winner taking 1st and 2nd place technically with the Mosquito and Copperhead. The Copperhead is a new comer and has near mosquito thermals at the transition zone for less money. I think the heatsink design is the reason but I'm far from an engineering master just a good background in engineering and studying designs. It's a tried and true design and it's without using materials like titanium it's producing the best results with the worst fan.

I'm going to continue the testing and feel free to use these results as you please. Every hotend measured is more than capable of great quality prints but how you cool it matters. Noctuas are underpowered and straying from proper cooling can cause you issues. Advancements in hotend design as well as unique materials can get us around much of these shortcomings as we can tell from the bimetallic heatbreak in the Copperhead and titanium heatbreaks. The future is looking promising for us printing nerds!!!