Peter M's blog View Details
Posted by Peter M | Jul 14, 2012 @ 02:59 AM | 18,666 Views
When Ambrose organised a group buy of Ritewings I successfully resisted the urge to put my name down for a D50 as I already have two D40's, an unbuild D40 and a TL50. But I kept thinking about having one but thought I had missed my chance. Then a NIB D50 was offered for sale from someone who was having second thoughts.......

I'm interested in running a folding prop, not because I break fixed ones, it's just that all the smaller diameter oversquare prop seem to be folders anyway. Plus I like gliding too!

I love the noise a big slow turning folder makes and this has led me to sped too much money on double overpitched F5D setups. I have also found that these moulded planes don't bounce like a Ritewing.

Chris Klick posted a vid on his new Zeph that featured a geared folder that looked kinda cool:
Molded Ritewing Zephyr II Maidn flights (6 min 35 sec)

I'm thinking a folder setup in a D50 going much much faster might be fun.
Posted by Peter M | Apr 28, 2012 @ 08:54 PM | 16,864 Views
First off:

A very clever guy called Drew started this thread that still makes me smile. It took a little while before they realised it was good natured fiction and should be in the humour section:

Quote: Regarding the inquiries to my lost plane: As some of you may have noticed, I'm an inventor. I have a solid background in engineering and through the use of my skills I was able to architect a last-resort, helium balloon-based, emergency rescue and recovery system. Upon impact several small helium-filled balloons inflate in an attempt to keep the plane from falling to the ground. The system worked perfectly, in the sense that it kept the plane from falling hundreds of feet to the ground, but, since the plane is carried away by the balloons, fails miserably in the aspect of recovery.....


The purpose of this update is not to discourage others from participating in Urban Aeronautics, no. But it is instead a word of caution sprinkled with optimism and wisdom that perhaps others can put to use in their push toward the advancement of this exciting and occasionally dangerous sport.

Last Sunday, after an extended hiatus from Urban Flying, I decided to give the P-51D Mustang a whirl around the neighborhood. The wife and kids were out of town, the parrots had been washed and groomed, the whiskey was flowing freely
...Continue Reading
Posted by Peter M | Mar 28, 2012 @ 06:07 AM | 18,154 Views
I'm no expert on launch ramps and bungees but I do get asked regularly about my setup.

Like most good ideas I have they were just stolen from others - Murdunoc and Arcteryxxx in this case - and just adapted to what I think best!

I like using ramps and bungees for launching as it gives 100% success everytime. Something I can't say about my hand launches.....

What I've learnt about Launch Ramps:
  • Use 25mm electrical conduit
  • Don't sweat the dimensions, it doesn't matter, just check it will fit into your car though! ( Mine is 150mm high at the back and 420mm high at the front, the top rails are 1400mm long and the width of centres is 320mm at the back splaying to 400 centres at the front. But as I said it doesn't matter as long as your model fits and it fits into your car!)
  • Place the pegging down locations where it won't cause the release mechanism to jam. The combined peg down point and latch set up on mine using a heavy single piece of ply works reliably and would recommend the same approach to others.

What I've learnt about Bungees
  • Tension the bungee to 4 or 5 times the weight of the model. I've never used too much tension but I have used too little...
  • Tie a lenght of cord to the model end of the bungee so that if the bungee breaks it won't hurt so much when it hits you.
  • The HobbyKing blue bungee tube is cheap and works fine if it is doubled up and gives about 6kg tension when doubled up. Use more in parallel if you want more tension.
  • Use rings that are welded closed. Key rings will just open up and fail under load.
  • Use a spring balance to check you get adequate tension on the bungee when setting up.
I hope this helps!
Posted by Peter M | Dec 18, 2011 @ 04:16 PM | 61,384 Views
F5D pylon racers with the traditional fixed 4.7 inch diameter prop spinning at 45,000rpm haven't really appealed to me due to the noise. (I make exceptions for Ritewing Demons spinning APC 6x4's at 40,000!)

However in recent years there has been more and more people using geared motors and folding props in F5D planes:
Viper F5B mit Kontronik Kira 480-31 / 5,2 Getriebe (2 min 1 sec)

Viper F5B
Motor: Kira 31-480
Getriebe: 5,2
Regler: FAI 18
Latte: RF 16X17 schmal (I found out this means "Slim"!)
Akku: 4S SLS 2400 mAh

Some are mind boggling (skip to about 2.00 if you're lingistically challanged):
Miha Holc leti 300 Km/h (2 min 59 sec)
...Continue Reading
Posted by Peter M | Sep 25, 2011 @ 01:59 AM | 19,558 Views
I was never interested in FPV until Trappy posted this. The timing was great as I had only just returned from visiting New York:
New York City (3 min 2 sec)

I like foamies:
Stryker Fun (3 min 2 sec)
...Continue Reading
Posted by Peter M | Sep 23, 2011 @ 09:11 PM | 22,498 Views
Forget the namby pamby 82 inch conversion that is quite common, I had a bright idea that I wanted the biggest so bought a 97 inch version, a Hacker A60-18L and thought it wouldn't take too long to get it converted and get flying.

That was two years ago now.

I searched the forums & the threads and only uncovered one previous conversion of this size:

Similar setup here:

It all sort of unravelled when I decided to install a sound system.

Then I decided the big ugly Hacker motor mount wouldn't do so I swapped to a rear mount Hyperion 5045.

Then I realised I would need to mount the 12 cell 5000's further forward to get the desired CG. The idea of adding lead to a model that already weighs 20 plus pounds wasn't what I had in mind.

I think I'm only a day's work or so away from finishing IF I can only find that bit of the fuselage I hacked out to become the battery hatch............Continue Reading
Posted by Peter M | Sep 23, 2011 @ 06:06 AM | 19,516 Views
A few photos that still make me smile whenever I see them....Continue Reading