# Recent content by Toobuilder

1. ### Spark redundancy.

Operators can petition for an exemption from MFG TBO if they have the data to back it up.
2. ### What Did You Do To Save General Aviation Today?

This thread is about getting off our collective a and reversing the "negative trends" of GA through positive, deliberate acts.
3. ### What Did You Do To Save General Aviation Today?

Ok, I did my part for today. Flew over to Mojave and traded some irrelevant 1's and zero's for much more usefull 100LL via the magic of a credit card. This somewhat valuable 100LL was then converted to far more interesting flight time. I think I've found a hole in the law of thermodynamics...
4. ### Drivetrain Power Loss

Perhaps there is a bit of a language barrier here, but a "differential" is a means to split power equally between at least two driving wheels. If there is but one wheel, there is no differential. Also, the Superbike era of the late 90's was NOTORIOUS for elevated claims of "crankshaft" power -...
5. ### Drivetrain Power Loss

Unsprung weight is a factor, but so is the torque reaction of the shaft as it tries to climb the ring gear on accel and decel. The "pogo" effect on the shaft drive bikes is quite unsettling. Unless you use a fairly complex multi link and driveshaft like BMW Paralever system, that is. And...
6. ### Drivetrain Power Loss

Yep, much of the asserions concerning drivetrain losses and "work" are laughable. The idea that there is a huge disparity in power output between the GSXR1100 and the GSX 1100G due to the shaft drive is also laughable. I have owned a few 1000 CC "Superbikes" in my day from the major...

8. ### Spark redundancy.

Well, Ross has essentially developed a zero drag cooling system for his Subie installataion, and I'm sure he's had the opportunity to fly with another SDS Lyc powered RV-6 head to head. Would be interesting to hear what the same airplane, the same engine mangement system, but radically...
9. ### Spark redundancy.

I have the dyno sheets from Lycon and it does list a BSFC number, but I also do not believe the claimed output. It is significantly overstated in my opinion, and that means the BSFC number is invalid. That said, and to Charlies point above, there are enough RV's flying around that pretty soon...
10. ### Spark redundancy.

Well, the current price of 100LL is within pennies of the lowest grade auto gas at the corner station around me (all over \$4 bucks per gallon) so the ability to run auto fuel has lost much of its luster. (And yes, my 540 eats the lowest octane car gas just fine). ...But gasoline pricing...
11. ### Spark redundancy.

Hey Ross - Are you aware of any auto conversions that run LOP relaibly in an aviation application? LOP ops in a Lyc/Con engine is well understood and the sheer brute strength of the pistons seems to offer some measure of protection from the inattentive pilot as he passes through the "Red Box"...
12. ### Drivetrain Power Loss

Quote of the week right there! Do you not recognize the credentials and real world experience of the individual your are trying to "school" here? This is your opportunity to learn a thing or two... But you need to read more and type less.
13. ### Spark redundancy.

The discussion concerns claimed superiority of one architecture vs. another architecture in a head to head comparison. Pick an altitude and speed to fly, remove the fuel and ignition variables - in most cases the Lyc is going to be very close to the BSFC of the theoretical "modern" auto based...
14. ### Newb from Las Vegas!

Welcome! I routinely fly my Rocket from the fiery hell of Mojave to the fiery hell of VGT for weekend getaways. Maybe we can tag up sometime on one of my trips and discuss "mission". Mine has evolved a bunch over the years - perhaps I can give you some insight on the early path decisions.
15. ### Spark redundancy.

Much of the inefficiency of the Lycoming is related to the applied systems, not the basic architecture. Yes, the updraft induction, plenum area, port shape and lower compression are "sub optimal" (to put it mildly), but even then, the very narrow operating range of the engine eases some of...