Thank you!

I'm glad you found it enlightening. We were surprised by how well it worked also. I took great pains to reproduce the ducts to the dimensions in the 1945 studies, and it seemed to pay off.

@@GregoryACross Thank you for directing to research!

That's a good question, to which I don't have an answer. I've not noticed any soot collection on the propeller at all, from my limited runs. I suppose one could locate top dead center of a cylinder and see where the prop times. Conversely, one could drill the prop such that it's not in front of the exhaust when an exhaust valve opens by observing the valve stems with the valve covers removed.

Sean, my engine mount was custom-made, because at the time nobody made one commercially. I understand that UL Power (USA) now has a source of engine mounts. I suggest you contact Ray Lawrence at Kaolin Aviation. He's UL Power's technical representative here in the US. (478) 232-9560.

It's one of Burt Rutan's early designs, called a "VariViggen". It's the only one known to be flying in the world.

Thank you for your interest. It's going to be a while... "90% done, and 90% to go". Lots of exterior finishing to do yet, which is very tedious work.

Yes, I did. I extended the engine mount 2", and shortened the prop extension by 2" so that the prop remained in the same relative position. With less weight on the back end, the maximum front seat capacity was reduced. Moving the engine backward helped restore that. (Remember that my installation is a pusher arrangement).

Is the weight different enough to enable the addition of a constant speed prop? 😁

Thank you.

I was also surprised that the brightness of both displays were slaved together to be controlled by either sensor. Yes, I have an Odyssey battery and I leave the Odyssey smart charger/conditioner connected at all times, except when I take it outside to run the engine periodically. It seems to be doing a good job of maintaining the battery in good condition.

I thought so, too. The weather was nice, and there were several planes that had not been there before. I have no idea what the actual count was, though.

You're correct! It helps to have another set of eyes to see behind the plane at start time. Also, the view to the right is obstructed by the open canopy.

That's a promising idea! I'll have to try it. It makes sense. The valve only determines where the excess pumped fuel goes, so the turning off of one pump and turning on the other one would seem to be the cause of the momentary pressure drop and the rpm drop. By starting the other pump first, that should alleviate the problem.

That's a good question. I guess I was swayed by costs. Dynon offers free periodic updates, that I think Garmin charges for. I felt that Dynon's initial purchase price was slightly less, also. Please don't go by just these comments. Explore the virtues of each to make your decision. They're both excellent choices.

What a cool idea! Thanks for the tip, John!

Sean, the engine comes with the mount points that are intended to be welded onto a mount appropriate to the aircraft you are installing your engine on. Since the Cozy is not a kit, i.e. it's scratch built from plans, there is no mount provided with the engine. However, it does come with all the accessories you would normally have to buy separately. UL Power here in the U.S. will build you a custom mount on request. You would want to talk to UL Power service rep. Ray Lawrence at Kaolin Aviation in Georgia about it: (478) 232-9560.

True... nor does it cost anywhere near that much. As aircraft engines go, it's a bargain.

It's truly a crime that more people aren't recommended to use Subaru engines. Never the less he has a plane and I don't so what do i know hahah :)

@@John-rw9bv People are scared off by Subaru engines in aircraft because there are a decent amount of people that tried but had too many issues making it not worth the squeeze to most builders.

@@GregoryACross If you don't mind me asking, how much did you pay? I am contemplating putting the UL520 turbo on my Long Ez.

@@majorchungus Well under $30,000. But, mine is not the turbo version. Prices vary from country to country, so best to consult your local UL Power sales representative.

Thanks 👍

It's a Cozy Mk. IV, but it's the same wing and elevator arrangement as a Long-EZ.

@@GregoryACross oh that's interesting. Why use the LongEZ wings and canards on the cozy?

@@deSloleye Designer Nat Puffer started with Long-EZ plans and widened the fuselage for side-by-side seating, first as a three place, then a four place airplane. The fuselage is actually a lifting body, so no additional lifting surfaces were needed. The Long-EZ wings and canard were satisfactory. The Cozy is the only design approved by Burt Rutan to be based on his designs.

Oh right so they never updated it towards the mark iv? Cool.

@@deSloleye The Long-EZ wings and canard are part of the Mark IV design. There is no need to "update".

Thanks RoboGuy! I think so too!

K Verb - thank you very much for your concern! You are correct. Engines with magnetos are particularly dangerous. This engine is very much like a modern automotive engine. It has FADEC (Full Authority Digital Engine Control), multi-point fuel injection and electronic ignition. (No magnetos). Although it wasn't shown on the video, I had just made sure that the master power solenoid was open (no ship's power), and also that the power switch to the ECU (Engine Control Unit) was also "off". There is no way this engine will run with no spark. It's kind of like coasting down the hill in a car and popping the clutch. If the key is off, it isn't going to start. However, similar to your gun safety analogy, making a habit of not manually turning ANY propeller is a good habit to have! Thanks again for your concern.

I'm not so sure... upping the horsepower doesn't affect the air frame drag characteristics. Down low, it wouldn't make much difference, as drag goes up with the square of the velocity. But at 15,000 feet, you could be right! What I would expect would be fantastic climb rates! At this point, I wouldn't want to go to the extra expense and effort to make the change. I want to see this thing fly before I die!

@@GregoryACross If I build one I would get the turbo for those nice climb rates and full manifold pressure up at 15,000ft.

@@PatrickMichalina That sounds great, but prepare for sticker shock. The UL520-T Turbo version is pretty expensive compared to the UL520-iS model.

Thanks, Scott! I appreciate the encouragement.

I'm not sure my neighbor appreciated blowing half the leaves in my back yard across the creek and into his yard! I need to apologize to him.

Yes, I'm very pleased with it! It's a very modern and up to date design.

Avionics are all Dynon. The HDX-1100, with the external Autopilot Control Panel, the Knob Control Panel, the VHF COM Radio, and the Two-Place Stereo Intercom. Also the ADAHARS module, the Mode-S Transponder with ADS-B Out, and the Dual Band ADS-B Receiver. There's also a generic magnetic compass. I don't plan to equip for IFR. www.dynonavionics.com/skyview-system.php

Thank you!

That's an interesting idea. Perhaps you could suggest it to them!

Thank you for the kind words, Pieter.

Thank you for the kind words, Adam! This was actually in December 2018, and we've done many successful runs since then. Back then, I posted just the little segment where it finally ran, so I wanted to show the whole episode here.

I'm glad it was helpful to you.

Yes, I am, Dana. It's sooo much easier to sand than other epoxies! I make they micro slurry as dry as I can for the same reason, and it's lighter than wet micro. It's my belief that it's not as allergenic, either.

Thank you, Marko.

I'm flattered! I do believe in sharing ideas - learning from each other. Of course, it's up to you to decide if the ideas are good or not! Ha!

My pleasure!

I'm currently working on finishing the exterior. Lots of filling, contouring and sanding, before it can be painted. It's slow work.

That's correct. Still working on it. Have to run the engine regularly, though to prevent internal rust damage.

Thanks for the caution, Mark. I hadn't considered that!