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Little Mediator designed by Bob Wallace

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Little Mediator designed by Bob Wallace

Post  Paul_BB on Wed Mar 09, 2016 7:11 am

Here is the Little Mediator designed in 1977 by Bob Wallace:





The engine is the Golden Bee Mk2. Flies well but needs definitely more power!
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Re: Little Mediator designed by Bob Wallace

Post  Marleysky on Wed Mar 09, 2016 7:28 am

Nice looking plane! Welcome to the forum!
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Re: Little Mediator designed by Bob Wallace

Post  fit90 on Wed Mar 09, 2016 10:34 am

Great looking plane!
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Nice plane!

Post  VUgearhead on Wed Mar 09, 2016 10:56 am

Paul_BB wrote:Here is the Little Mediator designed in 1977 by Bob Wallace:





The engine is the Golden Bee Mk2. Flies well but needs definitely more power!

That's a really nice plane Paul. I can't tell if it's a foam wing or built up. It looks like the center joint is glassed like a foam wing, but I think I can see rib lines thru the covering on the right wing.

Also, tell me about the GB Mk II. I haven't heard that designation before for a Golden Bee. Throttled?
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Re: Little Mediator designed by Bob Wallace

Post  getback on Wed Mar 09, 2016 2:29 pm

That is a nice clean looking design is it me or is there no rudder ?, I don't see a break in the stab/rudder (just aerlions ) Looks maybe muffler throttled ? Welcome back Paul ! RC Plane
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Re: Little Mediator designed by Bob Wallace

Post  1/2A Nut on Wed Mar 09, 2016 2:42 pm

Its a built up wing, no rudder looks like a 6x3 cox prop.
Paul you can run without the muffler for a tad more power.
A Master Airscrew 5.5x4 might get it moving a bit faster
for more solid control. Can also try a high compression
head with 1 shim. What is your nitro content?.
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Re: Little Mediator designed by Bob Wallace

Post  Paul_BB on Thu Mar 10, 2016 12:20 am

Thanks guys for the kind words. Smile

I found the plan here :
http://pulling-gz.blogspot.fr/2012/08/rc-modeller-plan-and-article-series_8803.html?view=timeslide

I'm 52 so I was a teen during the 1/2A craze. This is pure nostalgia. I was raised in a hive full of Babe Bees. Next model will be Carl Goldberg's Jr Falcon with throttle.

The Little Mediator has a built up wing, there is no throttle nor rudder. The Golden Bee is a nice engine but the model was designed around the .049/.051 Tee Dee. I want to keep the muffler to protect the engine compartment from the exhaust gases. But I may drill the muffler a little to increase the exhaust diameter.

I bought the Golden Bee Mk II here at Cox International. I suppose they call it this way because it is made of original parts excepted for the plastic backplate?

TDs aren't available anymore so I think I'll buy a Venom II or a Purple Python and put the Golden Bee Mk II into the Jr Falcon.

The Little Mediator flies exactly like a little Ugly Stick. Easy to fly but highly manoeuvrable, no tendency to tip stall, landing speed is very slow.

It is a Cox 6x3. Thanks for the tip, I will try other propellers.
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Re: Little Mediator designed by Bob Wallace

Post  1/2A Nut on Thu Mar 10, 2016 4:45 am

Paul there are tons of TD's going for sale on EBay all the time and RC carbed Norvels.
Anything else wont offer enough power increase to make it worth the money for your
size plane.

TD .049 Mint

http://www.ebay.com/itm/Vintage-Cox-Tee-Dee-049-Model-Airplane-Engine-NIB-Never-Removed-/351670316574?hash=item51e12f2e1e:g:H4AAAOSwh-1W2vW1

TD .051 Mint

http://www.ebay.com/itm/Vintage-Cox-Tee-Dee-051-Model-Airplane-Engine-NIB-Never-Removed/351670318802?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D35851%26meid%3Db0193c7ed08d4b239d259c8874fda1f3%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D351670316574

TD

http://www.ebay.com/itm/New-vintage-cox-tee-Dee-051-in-box-/231868641555?hash=item35fc72b113:g:I1cAAOSwZQxW3Ii1


QB

http://www.ebay.com/itm/Cox-074-Queen-Bee-RC-Model-Airplane-Engine-/172125707584?hash=item28137ddd40:g:qQAAAOSwoBtW3dgY


TD

http://www.ebay.com/itm/Cox-Tee-Dee-Gas-Model-Airplane-Engine-Control-Line-Free-Flight-R-C-049-NIB-/201535416518?hash=item2eec7268c6:g:Nj0AAOSwu1VW2mYY


TD

http://www.ebay.com/itm/Cox-Tee-Dee-049-Glow-Fuel-Control-Line-Model-Airplane-Engine-NIB-/301890829835?hash=item464a187e0b:g:CKMAAOSwyjBW3MfJ


.09 with throttle

http://www.ebay.com/itm/Cox-09-Model-Airplane-Engine-/172123495714?hash=item28135c1d22:g:kW8AAOSwmmxW2v1j

TD

http://www.ebay.com/itm/Cox-049-TD-Model-Airplane-Engine-/172125688342?hash=item28137d9216:g:-7MAAOSwAuNW3dSw




Check this RC Medallion out mint seller thinks he has a TD

http://www.ebay.com/itm/Vintage-Cox-TeeDee-051-with-rare-Hiscott-Throttle-/111930006386?hash=item1a0f8c5b72:g:Lc8AAOSwv9hW33D7

Medallion

http://www.ebay.com/itm/Vintage-Cox-Medallion-049-Model-Airplane-Engine-with-Tatone-Engine-Mount-/291705020874?hash=item43eaf961ca:g:GekAAOSwP~tW4Pbb
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Re: Little Mediator designed by Bob Wallace

Post  Paul_BB on Thu Mar 10, 2016 5:30 am

Wow, thanks a lot for the links 1/2A Nut. I don't want to butcher my Little Mediator (no separate tank, etc..) so I will buy the Venom anyway. As you can see on the picture I have drilled a hole through the engine compartment wall in line with the muffler exhaust. So fitting a TD will challenge all this work.



But I am considering building one day a HoB P51D Mustang, so I may want to buy a TD. bounce


Last edited by Paul_BB on Thu Mar 10, 2016 5:39 am; edited 2 times in total
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Re: Little Mediator designed by Bob Wallace

Post  Paul_BB on Thu Mar 10, 2016 5:38 am

I have placed a bid on the .051 TD. bounce
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Re: Little Mediator designed by Bob Wallace

Post  PeterJGregory on Thu Mar 10, 2016 6:52 am

Beauty of a plane, great work. I was literally just over on outerzone looking at the Little Mediator - Steve's latest upload - and came over here to see the plane again. Nice specimen.
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Re: Little Mediator designed by Bob Wallace

Post  NEW222 on Thu Mar 10, 2016 4:49 pm

Paul_BB wrote:Wow, thanks a lot for the links 1/2A Nut. I don't want to butcher my Little Mediator (no separate tank, etc..) so I will buy the Venom anyway. As you can see on the picture I have drilled a hole through the engine compartment wall in line with the muffler exhaust. So fitting a TD will challenge all this work.



But I am considering building one day a HoB P51D Mustang, so I may want to buy a TD. bounce

And you covered the awesome looking woodwork why? Very Happy I think your building is super and looks great.
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Re: Little Mediator designed by Bob Wallace

Post  Paul_BB on Fri Mar 11, 2016 12:02 am

Thanks Peter and New222. Flying a model that you have built yourself is a huge reward. And the more time and effort you spend on it, the more rewarding. Even if you cover the woodwork. Very Happy
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Re: Little Mediator designed by Bob Wallace

Post  KariFS on Sat Mar 12, 2016 2:42 am

That is a really good looking plane. I like the engine cowling area, makes it look very streamlined.

The plan is now also on outerzone, Thanks Paul Smile

http://outerzone.co.uk/plan_details.asp?ID=7527

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Re: Little Mediator designed by Bob Wallace

Post  getback on Sat Mar 12, 2016 8:03 am

KariFS I like that cowel also it gives a slick appearance , I guess with that Plan you would have to hollow out a large balsa square , with the right tool wouldn't be to bad but take some time and skill for sure . getback Very Happy
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Re: Little Mediator designed by Bob Wallace

Post  Paul_BB on Sat Mar 12, 2016 9:42 am

In fact it wasn't a whole block of balsa. This is how I made the cowl:



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Re: Little Mediator designed by Bob Wallace

Post  KariFS on Sat Mar 12, 2016 9:53 am

Thanks for the in progress photos. I see you used the engine while positioning the plywood ring, good way to get it positioned perfectly. Can you get to the engine mounting screws through the hole in the nose?

I read parts of the build thread in the other forum, very meticulous build. Once I learn to fly something faster than my Slow Stick, this design may well come to my build list.
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Re: Little Mediator designed by Bob Wallace

Post  Paul_BB on Sat Mar 12, 2016 10:15 am

KariFS wrote:Thanks for the in progress photos. I see you used the engine while positioning the plywood ring, good way to get it positioned perfectly. Can you get to the engine mounting screws through the hole in the nose?

I read parts of the build thread in the other forum, very meticulous build. Once I learn to fly something faster than my Slow Stick, this design may well come to my build list.

Yes there is just enough space between the engine and the ring to insert an Allen wrench. I keep the wrench against the engine so as not to scratch the ring. I also need to remove the cylinder/glow head in order to mount the engine on the plane.

The model is relatively easy to fly, especially at low speed. You only need intermediate skills to fly it (it was designed so). No tip stalling, easy to land because of the thick airfoil.
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Re: Little Mediator designed by Bob Wallace

Post  MauricioB on Mon Mar 14, 2016 9:13 pm

Paul_BB wrote:Here is the Little Mediator designed in 1977 by Bob Wallace:





The engine is the Golden Bee Mk2. Flies well but needs definitely more power!

Paul Hello !, how are you ?, your model is very cute, has a similarity with the Mini Bird, or not?
Regards!

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Re: Little Mediator designed by Bob Wallace

Post  Paul_BB on Tue Mar 15, 2016 1:04 am

Hi Mauricio, thank you for the kind words. Very Happy

Yes the two models resemble each other. They have the same configuration so I suppose they fly in the same way.
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Re: Little Mediator designed by Bob Wallace

Post  Oldenginerod on Tue Mar 15, 2016 6:48 am

1/2A Nut wrote:Paul there are tons of TD's going for sale on EBay all the time and RC carbed Norvels.
Anything else wont offer enough power increase to make it worth the money for your
size plane.

TD .049 Mint

http://www.ebay.com/itm/Vintage-Cox-Tee-Dee-049-Model-Airplane-Engine-NIB-Never-Removed-/351670316574?hash=item51e12f2e1e:g:H4AAAOSwh-1W2vW1

TD .051 Mint

http://www.ebay.com/itm/Vintage-Cox-Tee-Dee-051-Model-Airplane-Engine-NIB-Never-Removed/351670318802?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D35851%26meid%3Db0193c7ed08d4b239d259c8874fda1f3%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D351670316574

TD

http://www.ebay.com/itm/New-vintage-cox-tee-Dee-051-in-box-/231868641555?hash=item35fc72b113:g:I1cAAOSwZQxW3Ii1


QB

http://www.ebay.com/itm/Cox-074-Queen-Bee-RC-Model-Airplane-Engine-/172125707584?hash=item28137ddd40:g:qQAAAOSwoBtW3dgY


TD

http://www.ebay.com/itm/Cox-Tee-Dee-Gas-Model-Airplane-Engine-Control-Line-Free-Flight-R-C-049-NIB-/201535416518?hash=item2eec7268c6:g:Nj0AAOSwu1VW2mYY


TD

http://www.ebay.com/itm/Cox-Tee-Dee-049-Glow-Fuel-Control-Line-Model-Airplane-Engine-NIB-/301890829835?hash=item464a187e0b:g:CKMAAOSwyjBW3MfJ


.09 with throttle

http://www.ebay.com/itm/Cox-09-Model-Airplane-Engine-/172123495714?hash=item28135c1d22:g:kW8AAOSwmmxW2v1j

TD

http://www.ebay.com/itm/Cox-049-TD-Model-Airplane-Engine-/172125688342?hash=item28137d9216:g:-7MAAOSwAuNW3dSw




Check this RC Medallion out mint seller thinks he has a TD

http://www.ebay.com/itm/Vintage-Cox-TeeDee-051-with-rare-Hiscott-Throttle-/111930006386?hash=item1a0f8c5b72:g:Lc8AAOSwv9hW33D7

Medallion

http://www.ebay.com/itm/Vintage-Cox-Medallion-049-Model-Airplane-Engine-with-Tatone-Engine-Mount-/291705020874?hash=item43eaf961ca:g:GekAAOSwP~tW4Pbb
Hey Nut, great links but I read them a little late.  Darn shame I missed this one.  Even the Intl. shipping was reasonable.
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Re: Little Mediator designed by Bob Wallace

Post  Paul_BB on Thu Mar 17, 2016 12:58 pm

I managed to drag my Honey Bunny to the flying field this morning and voila, here's a video. The autofocus didn't work properly.

https://youtu.be/4W7FFes2zAI
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Re: Little Mediator designed by Bob Wallace

Post  MauricioB on Thu Mar 17, 2016 1:14 pm

Paul_BB wrote:I managed to drag my Honey Bunny to the flying field this morning and voila, here's a video. The autofocus didn't work properly.

https://youtu.be/4W7FFes2zAI

Yes !!! ... very nice video and the music is great! Paul congratulations !!Mauricio.
....with your permission ... here youtube add window
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Re: Little Mediator designed by Bob Wallace

Post  coxaddict on Thu Mar 17, 2016 4:18 pm

I built a Jr. Falcon back in the late 70's. It was powered by a brand new Cox Black Widow. On its maiden voyage I watched it fly out of sight as the wind in Hawaii just picked it up and took it away.
I jumped in my car and went searching the area where it disappeared. I saw a bunch of kids sitting on their bicycles pointing at the cane field. I stopped and asked what was going on and they said they saw an airplane go down there. I found my plane about 100 yards in and about a mile from where I launched it. Never flew it again. Lately I have flown 2 and 3 channel park flyers only in the early morning or late evening when there is no wind. They are brushed/NiCad powered planes that I am thinking of repowering. Are there any designs out there that can be flown in windy conditions?
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Re: Little Mediator designed by Bob Wallace

Post  Paul_BB on Fri Mar 18, 2016 12:07 am

Thanks Mauricio. Smile
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Re: Little Mediator designed by Bob Wallace

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