- Category: Archive 2015
- Hits: 291
- Moose Cup
- Got used to it
- The rules of golf
- golf ball
- The numbers are the wrong way
- New Sidus F1C Timer
- Square Booms for F1A
Moose Cup Flash
Swedish Moose Cup 2015 (World Cup)
fROM: Robert Hellgren
Hi Roger, please find the full results from Swedish Moose cup at the webpage: www.norbergsfk.se/swedishmoosecup
BR, Robert Hellgren
From: John Cuthbert
Would you please be kind enough to place the following WANTED ad in your next issue of Scat news:
Got used to it
Peter said it all! Great response. Couldn't agree more.
The Rules of Golf
To: Sen, New
I sadly must correct my fellow Brit and Squire of Taft, Lord Allnutt. The
rules of golf have significantly restricted technology in recent years,
with limitations applied to ball dimple symmetry, radius and depth, all to
ensure that performance doesn't outstrip the field, er, I mean course. If
FF had followed a similar path to golf then CIAM would have restricted
turbulator size, position, and probably the chin of your chin (on the
airfoil, not your face). The same rule restrictions to limit performance
has been true in other sports such as tennis, F1, and the Haggis World
Series. In fact arguably FF has seen less restrictions in recent years, but
then sometimes the facts do get in the way of a good story.
From: Gil Morris
Peter, un-be-knownst to most, there is a group developing a "drone golf ball" expected to go tee to hole in a single stroke.
The cost is untouchable except for Tiger Woods who could then surpass Jack Nicklaus' record. The PGA is aware of this threat and has learned that to make the hole in one the golfer has to impart enough energy to the ball to reach the hole. (The ball will be able to destroy excess energy by unnecessary maneuvers such as loops and spins in transit). So, to combat the threat, the PGA is considering making 18 hole golf courses 9 holes with tee to hole nominally 600 yards instead of 300 yards. Even Tiger Woods couldn't muster that. Thereby, the threat is averted. Back to square one
Editor's Comment - Gil has gone way past the haggis eater, good to see the EoB out classed by a F1C flyer
The numbers are the wrong way around
From: Douglas Galbreath
I enjoyed Peter's musings about golf. I love this guy.
Other than that, my first thought was Golf's tools cost about $500 bucks and last place in a golf tournament pays about $125,000. F1 is the sorta other way around.
Rectangular F1A tail booms
At the Maxmen I timed the Israeli Junior Omri Schechter in the F1A flyoff together with Yuhuda Zack (the El Al Captain). Omri had a perfect launch and as the model bunted it DTed. Yuhuda said 29 seconds which turned out to be a perfect prediction. Evidently this is a known phenomenon in models with a stab is controlled by a level mounted on a pulley. The bunt angle is say 80 degrees, while the DT angle is a bit higher, say 85 degrees. Evidently, the pulley wheel over rotates. I felt sorry for Omri, but he seemed to take things in stride, placing 23rd out of 58.
At a high enough speed a sudden increasing the stab’s AoA will generate considerable lift. Brian Eggleston has estimated and demonstrated that bunt maneuver can considerably deform a tail boom. And when the tail boom deforms upwards, the lower braded steel line is further away from the geometrical center of the deformation, causing the pulley to rotate clockwise - triggering a DT instead of a bunt.
A round tail boom is the perfect form for twisting, which is why it’s used for F1B motor tubes. However, it’s a poor shape for bending relative to a rectangular shape. (Think about main spars in a wing.) So instead of the standard tail boom with a diameter of 14-15 mm down to 7-8 mm, consider a rectangular tail boom starting with say 15 X 15 mm square, down to a 10-12 (height) X 5-6 mm rectangle at its end. Such a rectangular tail boom will resist bending forces much better and will allow more of the pulley wheel to be embedded in the tail boom. Such tail booms are a bit heavier (larger surface area) and will cause a very slight increase in the model’s drag. (Making a stronger round tail boom is even a heavier solution.)
Once rectangle F1A tail booms are produced I’m sure they will become popular. (Similar logic applies to F1B tail booms that tend to break at their base or just before their fin in DT landings.)
How would a vertical web inside a round boom work ?