Re: CEF speed contest Design Discussions (2014)

roddie Sun Aug 24, 2014 9:57 pm

RknRusty wrote:One of our club guys, David Smith flew his speed plane at Triple Tree yesterday. It's a 21 proto speed. I e-mailed him to find out the line length and engine, so I'll post that when I find out. This mother was Loud! Listen to it slice the air on the close passes. 26 laps and he's leaning back against the pull.

NICE!!! I'll guess 52' lines. What a SCREAMER!! Nelson engine?

**RknRusty** Sun Aug 24, 2014 10:04 pm

roddie wrote:NICE!!! I'll guess 52' lines. What a SCREAMER!! Nelson engine?

That's my guess too. I'll let you know when he returns my e-mail.

**Cribbs74** Sun Aug 24, 2014 10:20 pm

Yeah, that was pretty quick.. Shocked

navion34 Mon Aug 25, 2014 4:17 am

This engine runs very well...

You can find NovaRossi, R&B, or Rex engines, good choice for speed models...

Theo Kleynhans Mon Aug 25, 2014 4:42 am

Hi Guys

Can someone please also paste the video link, I cannot watch the video as it is shown at the moment.

Theo

ian1954 Mon Aug 25, 2014 5:47 am

Theo Kleynhans wrote:Hi Guys

Can someone please also paste the video link, I cannot watch the video as it is shown at the moment.

Theo

https://www.youtube.com/watch?v=HmflRE9CUBQ

Theo Kleynhans Mon Aug 25, 2014 5:48 am

Thanks

Much appreciated

getback Mon Aug 25, 2014 2:04 pm

YES!!! that was speedy lol!

ERic

Mike Mulligan Mon Aug 25, 2014 4:30 pm

That's pretty inspiring! Hats off to anyone who has to lean into their Reedy like that! lol!

Mike

**RknRusty** Mon Aug 25, 2014 9:19 pm

The engine is a Rossi. No word on the line length.

Theo Kleynhans Tue Aug 26, 2014 1:32 am

WOW!! That was fast Rusty.

I would be afraid to try and fly that thing!!

Theo

Theo Kleynhans Tue Aug 26, 2014 1:38 am

Hi Guys

I figured what I wanted to do with the nose on my Nemesis. I used an aerosol can.
This is where I am now:

CEF speed contest Design Discussions (2014) - Page 7 Img-2072

CEF speed contest Design Discussions (2014) - Page 7 Img-2073

CEF speed contest Design Discussions (2014) - Page 7 Img-2074

Theo

ian1954 Tue Aug 26, 2014 3:24 pm

I like the unusual shape - it seems appropriate.

I do hope that it won't be too heavy.

Mike Mulligan Tue Aug 26, 2014 4:18 pm

Theo Kleynhans wrote:Hi Guys

I figured what I wanted to do with the nose on my Nemesis. I used an aerosol can.
This is where I am now:

Theo

WOW! It looks like a jet!

Hmmm... That gives me an idea. A Dynojet is technically a reed valve engine, isn't it??? lol!

pkrankow Tue Aug 26, 2014 6:20 pm

Mike Mulligan wrote:

WOW! It looks like a jet!

Hmmm... That gives me an idea. A Dynojet is technically a reed valve engine, isn't it???

I had to double check. The rules specify a cox .049/.051 reed engine.

DAMMIT!

Phil

Mike Mulligan Tue Aug 26, 2014 11:52 pm

pkrankow wrote:

I had to double check. The rules specify a cox .049/.051 reed engine.

Phil

Drat!! Foiled again! What?

Theo Kleynhans Wed Aug 27, 2014 8:45 am

ian1954 wrote:I like the unusual shape - it seems appropriate.

I do hope that it won't be too heavy.

Yes it does look like it is fitting Ian.
I unfortunately do not have a digital scale that can weigh these light parts. But it actually feels really light.

Theo

JPvelo Thu Aug 28, 2014 12:29 am

Here's a little motivation for someone's racer:
http://www.ebay.com/itm/Rare-Valentines-Cox-Space-Hopper-049-cu-in-Glow-Model-Engine-NIB-/371110141732?pt=Radio_Control_Parts_Accessories&hash=item5667e35f24

JPvelo Fri Aug 29, 2014 11:18 am

Test flew the staggerwing today. It flew exactly as I wanted, visibly arced into the circle. It almost came in on launch but the lines tightened when it got some speed.
I'm not going to give up any numbers but let's just say I am VERY pleased with the results!

Jim

Theo Kleynhans Fri Aug 29, 2014 11:33 am

I am very glad that it is flying great Jim. Sounds like we are in trouble.

I have a question: with these planes so loose on takeoff, will it not be extremely difficult to hand launch? I think previously you mentioned you also tested your previous plane without wheels. How are you getting a decent takeoff?

Theo

pkrankow Fri Aug 29, 2014 12:00 pm

the launch can involve a significant amount of out yaw, that along with whipping and back peddling can overcome loose lines fairly well.

Have a clear field, and good shoes for nimble feet!

Phil

JPvelo Fri Aug 29, 2014 12:45 pm

pkrankow wrote:the launch can involve a significant amount of out yaw, that along with whipping and back peddling can overcome loose lines fairly well.

Have a clear field, and good shoes for nimble feet!

Phil

What Phil said! Exactly!

Ken Cook Fri Aug 29, 2014 12:52 pm

Theo, if your looking for a decent takeoff use a lot of tip weight until you get used to it. If you traditionally use 1/4 oz., make it 1 oz. . My tip weight is externally applied so that I can add or subtract. If your plane is using a single gear wire, splay the wire over so that it automatically places the outboard tip on the ground. Ken

JPvelo Fri Aug 29, 2014 2:10 pm

Theo,
This is my launch today. You'll notice I step back and pull the lines back to my ear to keep the lines tight.

Jim

Theo Kleynhans Fri Aug 29, 2014 3:09 pm

Thank you for the video Jim. I see what you guys mean.

I am a bit afraid of this launching. I tried a .15 racer a while back and could not get it to take off. Everytime it came into me on launch.

This is going to be the hardest thing for me.

Thanks to all you guys for the help.

Need to get building on my Nemesis again this weekend.

Theo

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