sprucemoose said:
OK, my turn to rant.
I'm going to disagree with you on this one. High speed taxi tests and "crow hops" are unneccesary and dangerous. If you have a well proven design (like the RV) properly weighed/ balanced, with proper control surface throws, sufficient static RPMs, etc (in other words- all the grounds checks are OK) and you have recieved training in type, then there is nothing worthwhile to be gained.
Many a plane have come to grief doing high speed taxi tests and crow hops.
I can't side with you on this one. While I agree the hop is a bad idea on a short runway, high speed taxi tests are very important. Todd has an RV airframe but a first time engine installation. Believe me this is far different than having a Lycoming up front. My high speed taxi tests uncovered SEVERE main gear shimmy on my 6A at about 40-45 knots. I'm glad I found this out before committing to a flight. Good chance to check the ASI as well and keeping it straight with rudder, especially with the big V8. These tests can help you develop a good checklist for your aircraft which you should always use of course.
Have your plan set out, keep it below 45 knots, always be aware of runway remaining and have your cut throttle point visualized before advancing the throttle. Once you reach your 40-45 knots, idle throttle.
Once all bugs are worked out that you can on the ground and the engine has been tuned and runs properly, you may be ready for the first flight. Have a written plan on just a few critical items to test and stick to that list. Brief tower personnel on your intentions in person if possible, keep it close to the runway in a gentle climbing turn, don't pick an airport surrounded by trees etc. if at all possible (this has killed more than a few). Expect the engine to fail at all times. This will keep you on your toes. Keep the flight short (10 minutes) so that you can check for possible oil and coolant loss on the ground.
Have your engine out plan firm in your mind at each phase of flight- runway go/ no go point, rotation, climb etc. Have a best glide speed calculated and stick to it at all costs until the flare. Have another pilot quiz you on your plan to make sure it is instinctive. There will be lots going through your mind on the first flight. No matter what happens, fly the aircraft, keep the speed safely above the stall at all times, keep bank angles low.
I'd also do a quick GPS/ ASI test upwind and downwind to see if they average out within 10 knots or so. You can then have some faith in the ASI.
Test, test, test on the ground, prepare well and enjoy it. There is no other feeling like it after your first flight with an alternate engine and new airframe. We want to see that RV grin!
Keep us updated on your project Todd. Very exciting.