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  1. rtfm

    Pitbull plans/drawings/owner's manual?

    Hi, In writing to this forum, I'm appealing to probably the most informed group of gyro enthusiasts in the world. Well, I hope so. Because I would like very much to build a clone of the Pitbull gyro. Actually, not so much a clone, as an evolution of the design, since approximating any design...
  2. rtfm

    FlightSim models to play with

    Hi, My good mate Bob Kelly has turned the designs of both the Razorback (2-place) and the Blade (single place) into Flight Sim models. Grab a copy if you wish, and have fun. You can find both models here: http://rtfm-aero.tk/dnloads/RTFM_Blade.zip rtfm-aero.tk/dnloads/RTFM_Razorback.zip...
  3. rtfm

    Swash plate question

    Hi guys, I know there are a number of Forum members who are both helicopter and gyro pilots, and in addition, those who are extremely knowledgeable about technical matters. So this question is directed at you... I think I have a pretty good handle on the standard offset gimbal teetering rotor...
  4. rtfm

    The NZ-built "Pivotal Engine"

    Hi, Seems we're living in an exciting time of innovation, as far as engines for aircraft go. I have recently discovered the Christchurch-based (ie a Kiwi company) Pivotal engine. 45Kg (99lbs) dry, 72Kw (96hp)... It is not that often that one stumbles on a really innovative yet simple idea...
  5. rtfm

    RTFM Blade Gyro concept

    Hi, While the months ebb away and the construction of the two-place Razorback project continues painstakingly, I find myself looking skywards as the weather improves, and wondering how many years before I will be flying the Razorback. Too many, I fear. I can see this project being completed by...
  6. rtfm

    Daihatsu 4-cyl 660cc turbo EFI

    Hi, Daihatsu make a 660cc turbo 4-cyl engine capable (in stock form) of the usual KAI-limit of 47Kw. It occurs to me that with modest turbo boost, and a bit of fine tuning this could easily be increased quite substantially without compromising reliability. Anyone know how much one of these...
  7. rtfm

    Gearbox question

    Hi, I'm currently considering my options for a powerplant, and need to ask a question which has surfaced obliquely from time to time on this forum, but which has always (to the best of my knowledge) been dismissed with either an indulgent chuckle or a dismissive smirk. Correct me if I'm wrong...
  8. rtfm

    Building the Razorback Tractor

    Hi, Well, after almost two years of concept and design work, I'm finally in the build phase of the Razorback tractor. I conceived building a tractor design back in August 2005, and since then have been though four (now discarded) build attempts, literally dozens of part-builds as I tested...
  9. rtfm

    Force required to change rotor blade pitch in-flight?

    Hi, Does anyone know how much force is required to alter the pitch of rotor blades in-flight? Most helicopters have pretty beefy pitch horns, so I assume the control forces are quite large. What about on a gyro? Anyone? Regards, Duncan
  10. rtfm

    Alternate aileron system?

    Hi, I know that this is a rotary wing forum, but since fitting wings to a gyro is not only feasible, but has already been successfully acomplished, I thought I'd ask advice of some of the members on the pros and cons of an alternative aileron configuration... Normally, ailerons are "cut into"...
  11. rtfm

    Tractor gyros vs Fixed Wing aircraft

    Hi, This might seem an odd question, but could someone elucidate the essential difference in flying characteristics between a tractor gyro and a (tractor) fixed wing aircraft? Seems to me that apart from rotor management, there is probably little difference. And if this is so, why is it so...
  12. rtfm

    Pushers vs tractors - pod-wise?

    Hi, I thought of asking this as part of 13brv3's thread, but thought it rude to interject a somewhat tangential question in someone else's thread. So here goes: I understand the yaw-related issues related to fitting a pod on a pusher gyro, but was wondering if the same potential problems exist...
  13. rtfm

    My first flying lesson

    Hi, I came across this a while back - written after my introductory flight in a Cessna 152, and I thought you might find it amusing... Regards, Duncan ========================== I had got to the stage where I was regressing into my teens again - all I could think about was flying, engines...
  14. rtfm

    Comprehensive engine comparison matrix

    Hi, The latest edition of Kitplanes magazine runs a fascinating and useful rundown on just about every aircraft engine available (in the US) today. Not included are the engines manufactured in New Zealand, Australia, the UK or in Europe. Still, it is a very interesting and enlightning read...
  15. rtfm

    Gimball offset question

    Hi, Every post I have found on the forum dealing with gimbal offset assumes the following as "given": The teeter tower, prerotator ring gear and horisontal torque tube form a unit at the top of the mast. In other words, the gimball offset (usually about 1") is situated as close to the top of...
  16. rtfm

    Might have a new rising star...

    Hi, As you are probably aware, I'm planning to mount the Cobra single rotor Rx-8 engine in the Razorback. Now, while I personally think this is going to be a winning combination, I'm fully aware of the fact that many folk don't like rotary engines, and would far prefer a traditional...
  17. rtfm

    Tractor vs Pusher engine requirements?

    Hi, I've done a search of the Forum just in case I'm asking an already answered question, but I seem to have drawn a blank, so here goes... What is the ESSENTIAL difference in engine requirements in a pusher vs tractor design? My reading of it is that since the tractor prop is out in clean air...
  18. rtfm

    Razorback Tractor/Pusher hybrid

    Hi, Well, it seems like things have taken a turn for the better at RTFMaero. After battling away in my double-garage workshop for over a year on the pre-prototype design of the Razorback, and recording mostly failures and dead-ends, I have finally secured some (modest) financial backing...
  19. rtfm

    Wing design question

    Hi, Hey, I know that this is a gyro forum, but since I'm going to be using wings on my gyro, I guess this question is relevant on this forum. Question: I have DesignFoil, an excellent software tool for calculating all sorts of wing parameters. However, while the software is easy enough to use...
  20. rtfm

    American vs European Gyro designs

    Hi, It is very easy to slip into a "laager mentality" when it comes to gyro design, and to subconciously disregard the design efforts of those who are "foreign". There is no malice in this - it is a natural tendency we all exhibit. However, I have recently been drawn to a number of European...
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