Author Topic: Cox Profile Scale Reed Speed (Read 65956 times)

Jim Roselle · « **on:** May 25, 2014, 08:18:19 PM »

Hello all,
I received the OK from Robert to post an event were doing over on the Cox Engine Forum. It's our second running of Profile Scale Reed Speed and it's exactly what it sounds like. Profile scale planes with cox reed valve engines in a speed contest.
Here's a couple of examples of the planes flown in the first event:

We had about fourteen planes built last time. If you want to participate its open to all cox engine forum members. You have until the end of November to get a flight in.

Here is a link to the rules if you want to participate:
http://www.coxengineforum.com/t5898-cef-profile-scale-reed-speed-rules

This is the discussion thread for the November running:
http://www.coxengineforum.com/t6801-reed-speed-version-20-nitro-november

And the results from the first event:
http://www.coxengineforum.com/t6798-reed-speed-results

Thanks for reading and I hope you participate!

Jim

Larry Renger · « **Reply #1 on:** May 26, 2014, 07:57:46 AM »

The old Thermal Hopper is a reed engine, can I use that?

Jim Roselle · « **Reply #2 on:** May 26, 2014, 08:20:36 AM »

Quote from: Larry Renger on May 26, 2014, 07:57:46 AM

The old Thermal Hopper is a reed engine, can I use that?

Larry,
Yes, any cox reed valve. The only restriction is no TDs' modified to take a reed.

Jim

Mark Mc · « **Reply #3 on:** May 26, 2014, 04:13:59 PM »

Quote from: Jim Roselle on May 25, 2014, 08:18:19 PM

Hello all,
I received the OK from Robert to post an event were doing over on the Cox Engine Forum. It's our second running of Profile Scale Reed Speed and it's exactly what it sounds like. Profile scale planes with cox reed valve engines in a speed contest.
Here's a couple of examples of the planes flown in the first event:

Jim

WooHoo! That one's mine. Recently refitted with a PeeWee engine.

Mark

Dan McEntee · « **Reply #4 on:** May 26, 2014, 10:16:27 PM »

Very cool! Search the forums here and there may be something about our Golden Age Races we have had here in St. Louis for many years. Models must be reed engine powered, replicas of Thompson Trophy Racers, 18 inch span and a few other rules, but we also allow full fuselage models. Frank Beatty has had several of his designs, profile and full fuselage, published in Flying Models and Model Aviation. Common set of lines that everyone uses, club provided fuel and only Cox 5-3 grey prop allowed. Lots of fun and challenging!
Type at you later,
Dan McEntee

Jim Roselle · « **Reply #5 on:** May 27, 2014, 04:27:34 PM »

Dan,
I have a copy of model aviation with a Bonzo plan from that event. Sounds like your club has some members that would be competetive in the Reed Speed event!

Jim

Balsa Butcher · « **Reply #6 on:** May 27, 2014, 10:14:05 PM »

My only question on the rules is that landing gear may be left off of planes whose full scale counterparts had retractable gear. If speed is the goal why would anyone build anything else? IMHO make LG mandatory, scale location optional. OBTW: Sea Fury and Corsair look great!

Jim Roselle · « **Reply #7 on:** May 27, 2014, 11:23:12 PM »

Quote from: Balsa Butcher on May 27, 2014, 10:14:05 PM

My only question on the rules is that landing gear may be left off of planes whose full scale counterparts had retractable gear. If speed is the goal why would anyone build anything else? IMHO make LG mandatory, scale location optional. OBTW: Sea Fury and Corsair look great!

Not everyone has a hard surface to fly from; and even if you hand launch grass landings with a gear that small are not pretty.
Thanks, the Corsair is mine. I'm going to build a aerodynamically cleaner version for this go 'round.

Here is a link to all if the finished models from the first running:
http://www.coxengineforum.com/t6652-reed-speed-best-model-poll

Jim

RknRusty · « **Reply #8 on:** May 28, 2014, 08:44:38 PM »

Aw gross, my Mustang is still paintless in that picture.

That was a fun contest. Like most of the other guys, I knew nothing of speed planes before you started this. I bet the next go-round will see some hotter action.
Rusty

david beazley · « **Reply #9 on:** May 29, 2014, 03:46:05 AM »

Any report on how the P-39 flew?

Jim Roselle · « **Reply #10 on:** May 29, 2014, 05:39:22 AM »

Quote from: david beazley on May 29, 2014, 03:46:05 AM

Any report on how the P-39 flew?

The P-39 hasn't flown yet. We had a relatively short flight window the first time around. That's why it's open from now until November 30th this time.

Jim

Paul Smith · « **Reply #11 on:** May 29, 2014, 05:55:54 PM »

The planes look GREAT. The only problem is the dwindling supply of healthy reed valve engines. I had several, but depleted them in numerous Walt Musciano hollow log events.

I think dispensing with the undercarriage and hand launching over grass might be the way to go, for several good reasons.

I know it blows the 1/2A concept, but the OS Max LA15 would be a viable alternative. They are less expensive than the current production run of "Cox" 049's.

Mark Mc · « **Reply #12 on:** June 01, 2014, 04:14:18 PM »

Quote from: Paul Smith on May 29, 2014, 05:55:54 PM

The planes look GREAT. The only problem is the dwindling supply of healthy reed valve engines. I had several, but depleted them in numerous Walt Musciano hollow log events.

I think dispensing with the undercarriage and hand launching over grass might be the way to go, for several good reasons.

I know it blows the 1/2A concept, but the OS Max LA15 would be a viable alternative. They are less expensive than the current production run of "Cox" 049's.

Where are these selling for below the price of an .049? I might have to get one of those.

Mark

Mike Mulligan · « **Reply #13 on:** June 07, 2014, 03:46:07 PM »

This sounds like WAY too much fun! Sketches started....

Mike

Jim Roselle · « **Reply #14 on:** June 07, 2014, 08:12:01 PM »

Quote from: Mike Mulligan on June 07, 2014, 03:46:07 PM

This sounds like WAY too much fun! Sketches started....

Mike

Cool, make sure and join Cox Engine Forum and check in once in a while so you are eligible.

Jim

Mike Mulligan · « **Reply #15 on:** June 08, 2014, 01:56:18 PM »

Quote from: Jim Roselle on June 07, 2014, 08:12:01 PM

Cool, make sure and join Cox Engine Forum and check in once in a while so you are eligible.

Jim

Will do Jim, thanks!

Jim Roselle · « **Reply #16 on:** July 16, 2014, 11:07:07 AM »

Progress is being made on the model for round 2:

Jim Roselle · « **Reply #17 on:** August 21, 2014, 08:03:12 PM »

Here's what I came up with for round two. So far...

Jim

PerttiMe · « **Reply #18 on:** August 22, 2014, 10:35:45 AM »

How are you launching models that don't have landing gear? Dolly? Or is hand launching feasible?

Jim Roselle · « **Reply #19 on:** August 22, 2014, 04:13:50 PM »

Quote from: PerttiMe on August 22, 2014, 10:35:45 AM

How are you launching models that don't have landing gear? Dolly? Or is hand launching feasible?

I've not flown the staggerwing yet but I've hand launched the corsair at the beginning of the thread. I was surprised at how well it worked.

Jim

Jim Roselle · « **Reply #20 on:** January 20, 2015, 02:59:20 PM »

Got the results in from this years event:

http://www.coxengineforum.com/t7730-reed-speed-2014-results#97474

Will post a link to the 2015 rules when I get them updated.

Jim

Jim Roselle · « **Reply #21 on:** March 02, 2015, 09:25:46 PM »

Here's the link for 2015 rules, a Tee Dee class has been added:

http://www.coxengineforum.com/t5898-cef-profile-scale-speed-rules

Jim Carter · « **Reply #22 on:** March 04, 2015, 04:20:11 PM »

Hi Jim! Not intending to be an irritant, I understand the photography requirements as written for the flight portion of the contest but does one need to document the build like a couple of the events being hosted on RCGroups? Thanks for your patience!

Jim Carter

Jim Roselle · « **Reply #23 on:** March 04, 2015, 07:34:19 PM »

Quote from: Jim Carter on March 04, 2015, 04:20:11 PM

Hi Jim! Not intending to be an irritant, I understand the photography requirements as written for the flight portion of the contest but does one need to document the build like a couple of the events being hosted on RCGroups? Thanks for your patience!

Jim Carter

Jim,
While it's not necessary to document most people do. It can lead to some lively conversation and it lets me know how many potential participants there are.
Thanks for asking, I hope you join in the fun!

Jim

Jim Carter · « **Reply #24 on:** April 17, 2015, 05:01:18 PM »

Quote from: Jim Roselle on March 04, 2015, 07:34:19 PM

Jim,
While it's not necessary to document most people do. It can lead to some lively conversation and it lets me know how many potential participants there are.
Thanks for asking, I hope you join in the fun!

Jim

Jim, do you have a preferred site on which to post documentation of the builds i.e. here, Cox Engine, RCGroups, etceteras??

Jim Roselle · « **Reply #25 on:** April 29, 2015, 10:18:47 PM »

Quote from: Jim Carter on April 17, 2015, 05:01:18 PM

Jim, do you have a preferred site on which to post documentation of the builds i.e. here, Cox Engine, RCGroups, etceteras??

Post on cox engine forum:

http://www.coxengineforum.com/t7115-cef-speed-contest-design-discussions

Sorry my reply took so long, I got married the day you posted.
Been a little busy

Paul Smith · « **Reply #26 on:** April 30, 2015, 05:59:14 AM »

Quote from: Jim Roselle on August 21, 2014, 08:03:12 PM

Here's what I came up with for round two. So far...

Jim

So you enlarged the venture to where it needs a bladder tank? And it worked?

Jim Carter · « **Reply #27 on:** April 30, 2015, 08:21:05 AM »

Quote from: Jim Roselle on April 29, 2015, 10:18:47 PM

Post on cox engine forum:

http://www.coxengineforum.com/t7115-cef-speed-contest-design-discussions

Sorry my reply took so long, I got married the day you posted.
Been a little busy

Well, I guess congratulations are in order!! CONGRATULATIONS

!! As for posting, okee dokee .... while I was waiting for your response I built and completed three planes for the event. I'm hoping to get to fly them someday soon once I figure out how best to video and time them.

RknRusty · « **Reply #28 on:** April 30, 2015, 11:51:01 AM »

Hey, Congratulations Jim! I guess you have been busy.

Quote from: Paul Smith on April 30, 2015, 05:59:14 AM

So you enlarged the venture to where it needs a bladder tank? And it worked?

Paul, yes the bladder works great. I used one on my Reed Speed Mustang. I used a Killer Bee backplate with a fine thread NV from one of the old Cox postage stamp backplates pressed into it. Or it might have neen one of the ones from Texastimers.com, same thing. It's harder to flood than a Tee Dee because if you slip and let the fuel flow too much, most of it just spills out the back of the engine. Fill the feed line, one good exhaust prime and it's first flip cranking every time, once you figure out where to leave the needle. If you don't have a KB backplate, you can bore one out. It's not critical as long as it's not too small.
Rusty

Here's my Mustang

Jim Roselle · « **Reply #29 on:** May 01, 2015, 06:35:40 AM »

Thank you Rusty and Jim!

Ditto what a Rusty said above. The only thing I would add is that it is critical you use the smallest fuel tubing available or you will flood the engine.

Jim

Jim Roselle · « **Reply #30 on:** September 30, 2015, 07:37:37 PM »

Time to post photos on CEF if your going to compete. Here's what I have:

ARUP · « **Reply #31 on:** December 27, 2015, 05:55:55 PM »

Here's what I built for the races! The build of the 1949 Lawrence Institute of Technology G-1 can be seen on CEF.

kevin king · « **Reply #32 on:** December 28, 2021, 04:43:13 AM »

Quote from: Jim Roselle on September 30, 2015, 07:37:37 PM

Time to post photos on CEF if your going to compete. Here's what I have:

Jim Your planes are amazing.