Great going Rob!!.... It's good to spread the knowledge to help our hobby grow..

Rob, well done. Passing on the passion of flying is a worthy endeavor.

You and all who aspire to instruct may benefit from the following link, entitled "The Instructor":

http://www.rc-float-flying.rchomepag...instructor.htm

Jack

While we're on the subject of newbies to this money-consuming, awe-inspiring hobby, let me tell you about Bjorn. He's a Michigan Tech student, 20 or so in age, in computer something or other. He lives close to where we fly in winter and stopped by. Then he became a regular observer, even in minus windchill factors. He said he would like to fly.

He was so consistent an observer, well-spoken, respectful, always willing to help, I told him I could put him on a buddy cord with my Big Stik .60 (the oldest bird I have in my hangar). So I got the bird ready, Bjorn showed up, and I put him on the buddy cord, three flights, every one better and better. He's hooked now.

It's that easy--and that complicated. Poor Bjorn. LOL

Jack

yea, ya probably ruined his college career now Jack, man what a guyyou can always tell when someone has that gleem in their eyes, and sounds like he has it.

my whole family looks at me when i say im going flying like im nuts, and think i spend to much money and i just say it dont cost no more than that motorcycle and that fishing boat you have to drag 70 miles to go fishing once a month and they all shut up

i love my hobby[8D]

Wish mine still looked that good,oh well,it still flys. I finally got out on a good day to see if the .46 will harrier with the same mods made to the .60-IT DOES!! I feel like I've broken the "Do" code,they do not harrier(good) right out of the box,I'm surprised Great Planes hasn't ever beveled all surface edges on the "Do"'s, they claim they are 3-D'ers, but they need a little tweeking IMO. If you look at all the other great 3-D planes, they all have double bevels. With the increased throw and spoileron mixing the .46 will harrier quite well,its a little more sensitive to wind though, but on a calm day I can see a harrier landing is possible. (With engine still running I hope). I'm just loving the 60 Do more and more,rolling harriers are so freaking slow its hard to imagine,the great thing about the "Do's" is recovery,they go from harrier to flight without falling,hover to flight as soon as the wings are level,a lot of comfort there,I'm thinking if you cant get down on the deck with a "Do", dont get down with anything.

Mixmaster...

You're mirroring my sentiment exactly. The UCD needs just a little mixing, programing, twiddling, beveling, etc. to make it better. But the more you fly it the better you like it. I have the 46 and the 60 and I'm thinking about the Giant.

I keep buying more expensive planes that fly precision better and other stuff better (supposedly) but I keep coming back to the UCDs because they are just so much fun to fly. With the 110 in the 60 it's a completely different airplane. The extra power made it fly better in every way. Wow what a riot to fly. I fly the 46 with an 82 and I feel the power is excellent, although many say the 100 is better. I'm gonna try that someday as well.

I haven't beveled the surfaces on mine...YET. Maybe I will. But I truly enjoy these planes. I hear all the time they won't KE, or Harrier, or Flatspin, or etc...Mine do. I think if you give the plane a chance and stick with it, it will reward you.

Thanks
Barry

Thanks Barry, Raideron and Jack. I hope to do well as an instructor. It should help me in my own flying as well. It should be interesting.........

Rob Clement - RC Congrads on becoming aflight instructor. I wasn't aware there was such a thing. Does AMA have program set up or was it done on a local club basis?

Barry, MacDaddy since you two are familiar with using 30% nitro fuel. I'm have a heck of a time getting it to run in my older engines (Saito 65, 80), they would not run rich enough to use higher nitro fuel. I could almost take out the high speed needle valve and the still kept running. This being after I took them out of planes, tore carbs apart and made sure they're wern't any blockages and then put them on a test stand. I was using med. fuel line and still no luck. They seemed to get to hot and would not run consistantly. Wanted to get this down before running it in my new 100, 125s. Any ideas?

Doug

Dougwill...

Don't know why yours won't run. Mine have always run exceptional with the 30% Nitro. My best guess is the older engine design did not allow it. I know Magnum engines don't seem to benefit much from the higher Nitro. I did some thrust tests on a Magnum engine and couldn't hardly notice any differnce in performance while the Saitos and YS inprove significantly.

My guess if you use the 30% in the 100 or 125 you won't have a bit of problem. I have both those engines and mine run fine and are easy to tune with the 30%. I use Cool Power Heli fuel.

Good luck.

Thanks
Barry

Doug,

Not sure either, only time I had an engine run without the HS needle in was a 2 stroker Tower 46, the LS needle was cranked all the way in, I adjusted it per the book and it ran great. Are the old Saitos AAC's or ABC's?

I know I was ready to rip the 72 out of my UCD 46 until I tried 30% ( I use Wildcat Youngblood), nite and day difference.

Another item, and this comes from a respected heli pliot at our field, he says any nitro over 18% is really just adding cooling capacity.....not power.

My hi temp problems I found were to my over proping the engine before I knew better.

Mac

Thanks Doug. I don't know how the AMA handles it but where I fly it's actually at a state park (state land) so we fly in cooperation with the parks dept. and when people first started flying there, there wasn't any rules or organization to it so they formed a club to make sure it could continue. The instruction program there is too make sure the rules and safety is adhered to and that people actually can learn to fly there. Here's a link to the field.....[link]http://www.flaminggeyserflyers.com/[/link] Since we fly on state land and want to include the public there isn't any dues or AMA required. Just donations.

Another item, and this comes from a respected heli pliot at our field, he says any nitro over 18% is really just adding cooling capacity.....not power.

For some engines this seems to be true. IE: Magnum and most 2 strokes. But on the 4 strokes (Saito & YS) I've seen a 20% or more increase in thrust according to my trusty fish scale. That's pretty impressive.

Thanks
Barry

Ok, most heli's are 2 strokers and need the cooling.... I run Coolpower 30% in my Raptor w/ an OS50 Hyper, it rocks.

Mac

I picked up some Powermaster 25% cheap so I'm going to try it in the 82 and 91. Oh yeah!

Ok here is a link to some interesting information about nitromethane. Read it for yourself, what it does is adds oxygen to the burning process allowing more fuel to be burned, increased compression (heat also) , more power, better idle, if engine is built for higher compression. Wow! Could possibly pick up 100 rpms for each 5% increase in nitro. Or not. Thanks guys.


http://www.geistware.com/rcmodeling/.../fuelfact3.htm

Doug

Dougwill...

Good link. Good information. What I get out of the article is that use the "good stuff" only if your engine is designed for it. I think the YS and later model Saitos are designed for it and benefit quite a bit from the higher nitro. Hence that is why when I use the incredibly accurate fish scale thrust test I see a good bit of diference in thrust with the the YS and Saito engines. Yet with the Magnum and most 2 strokes I've tested I don't see the benefit. But one thing I also believe is the engine runs better on higher Nitro. It will transition and idle better if you use higher Nitro.

Good article, in my mind it backs up what my primitive tests have shown with facts. Don't understand the facts, but I do understand the power increase I see in my engines.

Thanks
Barry

Barry, I don't know. The guys in the Club Saito forum are dissing high nitro mixes. They're saying 4 strokes work fine down to 5% nitro. I got 2 gals of Wildcat 35% nitro--thinking I might get better performance and fuel efficiency, but the guru, Bill Robison, says 4 strokes drink high nitro FASTER than low.

I'm running 15% Wildcat in my Saitos and they start, easily, in weather down to 30 degrees (a little lighter fluid in the line helps when the temps get really low). And I'm getting dependable 17 minute flights on my 11oz tank now, after I installed the Saito velocity stack and Bru-line filter. Before I was getting just 13 safe minutes with the 11 oz tank.

The big advantage of the velocity stack (sold through Horizon, $6.75) is that my firewall is now clean, no more spillage and blow back from the carb mouth--which was HORRENDOUS, covering the plane, before the velocity stack. I had to lean out BOTH ends of the Saito. And for the first time, she idles down to 2000 rpm (13 x 5 prop).

J.

Jack211...

My engines don't seem to get less milage with the 30%. In fact when I was using 15% I had to use full throttle more which resulted in less milage. So...maybe they burn 30% faster but you don't need as much throttle because of the extra power. Maybe a wash?

The velocity stack sounds intriging. Do you have any power loss, more/less? Any disadvantages?

I'm going to search Horizons site and see if I can see one. Is yours for 100 or 82?

Thanks
Barry

Hey Barry, Have you heard anything about the new BME 90 gasoline engine? Just wondering if i would work for 3D type flying.

Rob Clement RC...

I haven't heard anything about it, but I don't chase gas much. Not yet anyways. Maybe someday but right now I'm content to "hover" just under the gas requirements with the 90 and smaller airplanes.

Thanks
Barry

I know exactly what you mean, I have several precision,IMAC type of planes(68" Yak & Ultra RC Giles)but they can have problems too.The Yak is great for rollers & little mixing is needed but it is not easy to hover,I haven't flown the Giles yet but expect it to be faster than the Do in all respects.What makes the Do special IMO is the cost/worry factor is low,it will do most anything at slower speeds,looks different but at my level,its helping me learn to do all the stuff you usually only see in videos. Even if its only a transition plane, its hard to ignore someone doing rolling harriers,harrier landings,hovering torque rolls all day,HA KE harriers & all the "normal stuff":flat spins,blenders,waterfalls,walls,ect.....Hell, come to think of it,only one or maybe 2 guys at my club can do some of that stuff with the high $$$,IMAC/precision/3-D planes. In fact,some of the guys in my club who are bashing the Do could benefit from flying one!

I dont agree with that "guru",when I switched from 15% to 20&30% in my Saito 150, my run times went up from 16-18min. to 23-25min. on a 16oz tank! I do stay in 3-D mode alot though, so i'm not at full throttle much. You should be resetting the high & low end to benefit from the extra punch, I had to lean out the high end quite a bit,doesnt leaning mean you are using less?

Forgot to mention I use Magnum fuel with 20% oil(YS/DZ mix).

Mixmaster...

Excellent points...I couldn't agree more.

The other thing...These airplanes are just a riot to fly. Flat fun.

When I'm at the field nobody has more fun...no matter what there plane will do or cost. Sometimes we forget...this hobby is about fun, not how perfect your KE is. At least that's how I feel.

Thanks
Barry

hey guys,

only on the sim will i go this low
or until i get better

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