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Author Topic: Roadrunner  (Read 3030 times)
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greggles47
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« on: October 21, 2009, 07:59:44 AM »

Back in the 60's my club flew open combat using these beautiful models.

Rules at the time required ROG - therefore an undercart ws required.

These models grew to 49" powered by 40's and would run to about 110 mph.

I've long needed to rebuild and enjoy. This one is to be powered by an Enya 25X in the hope that, I won't end up with 60' of control line around my ears.

I'm enjoying the build so much, I'll probably have to build another - Maybe the next one will get the Fox 36X or K&B 40 Roll Eyes
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greggles47
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« Reply #1 on: December 03, 2009, 05:38:34 AM »

Slow progress to date. But now I've got some colour on it.

Should be finished to fly early new year.
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robert mathison
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« Reply #2 on: December 04, 2009, 07:20:56 AM »

Hi Greg,

That model looks to good to be used in COMBAT, it looks like a stunt ship to me.

Bob
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gossie
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« Reply #3 on: December 04, 2009, 03:48:04 PM »

Hi Greg,

That model looks to good to be used in COMBAT, it looks like a stunt ship to me.

Bob

You're right on Bob. I saw it elsewhere and thought exactly the same.

Looks nice though Greg.
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greggles47
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« Reply #4 on: December 05, 2009, 06:07:00 AM »

Guys please, Watch your Language!!

[email protected] indeed!! Huh

This is how combat used to be in the 60's. Open combat had compulsory ROG & 2 models per event rules. This model won the 65 nats (flown by Joe supercool). See the pic attached.
By the 70's hot 40's were taking these up to around 110mph. A little behind the fastest wings but could turn with them and certainly out survive them.
I hope this one is a little more sedate, I'm powering it with an Enya 25X and hope for a speed around 75-80. Looking forward to getting lines on it - even if it does look like ... one of those models Grin
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greggles47
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« Reply #5 on: December 07, 2009, 06:48:51 AM »

Well it's finished, and ready to fly!

Perhaps a bit tail heavy, but came in at 32 oz, shouldn't be too much for a 25.
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gossie
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« Reply #6 on: December 07, 2009, 04:33:04 PM »

Nice, but where's the CANOPY? Grin Would Nolene Brown like it? Cheesy
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greggles47
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« Reply #7 on: December 15, 2009, 05:35:27 AM »

Got to fly it last week.

WOOOOHOOOOO!!!

About 80mph, flies like a dream. Rock steady in blustery wind, turns like a combat model should.

since then dressed it up with some ID. But no canopy. Maybe if I need to slow it down a bit I'll put a canopy on, but it'll have to be underneath, Coz it just wouldn't look right any other way.

As for Noeline Brown....ahhhh loved her then & love her now, so many quotable quotes.
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gossie
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« Reply #8 on: December 15, 2009, 04:07:26 PM »

Yes, Noeline was/is great. Sorry I spelled her name wrong.
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Graiskye
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« Reply #9 on: December 15, 2009, 04:21:31 PM »

She's a beauty Greggles. Even if it does have 'them' lines.

I couldn't bring myself to try to 'smash' that into the rear end of another plane, 'cause that's all that would happen if I was flying.

Have fun.
- G.
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greggles47
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« Reply #10 on: December 16, 2009, 06:18:48 AM »

G'day Graiskye,

I don't think you'd need to worry about flying through another model. Back in the day, their major competition was Voodoos and similar flying wing types. Alas no match for fully sheeted leading edge and spruce (obechi back then) spars doubled in the centre section. In short, as strong as the proverbial brick outhouse.

Looking forward to Saturday for another go.
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The Kiwi
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« Reply #11 on: June 06, 2010, 05:30:59 PM »

Hi Greg,

That model looks to good to be used in COMBAT, it looks like a stunt ship to me.

Bob

What it looks like to me is far too much WORK to build for a combat event. When I was entering several contests a year, I would start by building a minimum of four planes at the same time, over the winter. There would usually be a couple of repairable planes from the prior season, so I would have about six in April. If the number of flyable plus repairable fell as low as three, I would build a couple more in mid-season.

That much wreckage meant I wanted easily built planes, not anything like that complicated looking Roadrunner!  Shocked
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greggles47
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« Reply #12 on: July 07, 2010, 08:34:36 AM »

Yeah Kiwi,

They're a lot of work, & I'm at a loss to remember why we put in so much work for a model that could go out in one bout. But we did & they hold a very special place in my memory. They have so much history about them. Designed by one of our best fliers, be it Combat or Aerobatics Paul Turner. They won many championships including the 1964 nats (see above pic). It surprised me that so many others have flown them, despite our club being a little obsessive about keeping the design to ourselves. We would be careful not to leave any pieces of trashed models around for anyone to get the section or moments.

This one will never fly a combat round I'll use it for those days when I want to feel 17 again, and just let it fly. Just don't call it a [email protected]#$ter, OK?
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greggles47
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« Reply #13 on: February 11, 2012, 05:51:26 AM »

After a spell the Roadrunner got a run today.

Another blustery day in Sydney, but the RR was just so well behaved....until late in the flight, as it leaned out it developed a bad vibration. A check revealed one of hte backplate screws mostly out.
 I've checked the prop, balance seems ok.
Engine mounting bolts seemed to be tight, (but maybe not enough??)
I've replaced the overweight prop nut, spinneret with a regular prop nut.

Any one got any thoughts on what would cause such a vibe?

Regards

G
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wreckbender
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« Reply #14 on: February 11, 2012, 01:53:57 PM »

Rudder flutter?
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greggles47
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« Reply #15 on: February 13, 2012, 04:40:03 PM »

Rudder flutter?

Thanks mate, I thought maybe elevator flutter, but it'd be a major PIA to change, so I'm looking for other alternatives first.
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wreckbender
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« Reply #16 on: February 18, 2012, 12:53:39 PM »

Have you found any solution yet?
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greggles47
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« Reply #17 on: February 18, 2012, 08:51:06 PM »

Not yet, I didn't take it out yesterday. I had another to sort out, and couldn't find a place for it in the car.

I'll give the motor a run through the week & see if that shows up any clues.

Thanks for the kick along.

G
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greggles47
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« Reply #18 on: May 22, 2012, 08:34:08 AM »

Retightened  the engine hold down bolts, taped the elevator & flap hinge gaps.

Success!! flies like a dream again, no flutter, except my heart.

Still kicks in on take off, just like they used to. OOPS!

Regards

Greg
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marisd
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« Reply #19 on: July 05, 2012, 11:03:24 PM »

I could be wrong, but someone said the Roadrunner was a modified Hearns Hobbies stunt model kit. That would explain why people built a relatively complex design - the kit gave you most of the bits.

MD
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greggles47
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« Reply #20 on: July 08, 2012, 03:32:38 AM »

I never built one from a kit. In fact there was no plan for them either. You had to be a Ryde MAC club member to be given a set of templates and built from there.

The Roadrunner was designed by Paul Turner, back when he flew combat. I must organise to give him a fly of the current one.

Greg
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greggles47
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« Reply #21 on: May 21, 2013, 06:40:02 PM »

Not full sized, but the mini version is just about off the board.

Designed in the early 1960's for the then new FAI combat. It was based on the Frisky plan, but given the RR aesthetics.

Mine is now stretched to 42" span. It's probably also longer to accommodate muffled engines. This one to have a Brodak .15
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OZPAF
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« Reply #22 on: May 21, 2013, 09:11:45 PM »

i remember watching combat at Centennial Park in Sydney - late 50's or early 60's and there seemed quite a few models flying similar to the Road Runner. Actually looking back the ROG starts seemed to make it more interesting.
One particular combat flyer seemed particularly wild - those were the days Mr Potter. Also when Grant Potter was being introduced to the gentlemanly sport at the Hunter Valley champs - they flew a similar model with his Dad pitting.
I would love o see one of these flying again. No plans?
John
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greggles47
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« Reply #23 on: May 21, 2013, 09:35:33 PM »

John,

The Roadrunner was designed by Paul Turner, and he tells me they were similar in layout to models then flown by Andy Kerr.

There are Roadrunner plans about (http://controlline.org.uk/phpBB2/viewtopic.php?t=9437&postdays=0&postorder=asc&highlight=roadrunner+plan&&start=0)
These do tend to go on for almost longer than the lifespan of most RR's, but there are a number of versions and if you can be bothered you can build one.

The first version of the plan that I posted there was published in an Oz modelling magazine I think sometime in the 80's. Well after our club had an exclusivity policy, so that no one else got so much as a square inch of crashed models. We were determined that they wouldn't fly against us.

The smaller one didn't ever have a plan that I know of, all models being built by the passing on of templates.

Regards

Greg
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« Reply #24 on: May 22, 2013, 03:12:17 AM »

Thanks Greg. It seems most likely that the model I remember seeing would have been the Andy Kerr version. I seem to remember it had a very small fuse perhaps a slightly longer tail arm and the last version I saw had much smaller flaps.
A 15 size version would perhaps go well with my Rothwell250 if I can still rotate.
cheers
John
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