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by MauricioB Yesterday at 10:08 pm

Cox Engine of The Month
November-2017
MauricioB's

"Cox Tee Dee .010"



PAST WINNERS
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The Traveling Prop
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Tee Dee Performance Crank

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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Tue Jun 30, 2015 2:15 am

http://www.rcgroups.com/forums/showthread.php?t=1499068&page=11

Follow thru this thread for info
AP Wasp .061




26,162 rpm static APC 4.2 x 4
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Mad Re: Tee Dee Performance Crank

Post  balogh on Tue Jun 30, 2015 5:51 am

Great. This Wasp is a Chinese engine? Why did you finally decided to replace the TD049 with it?
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Tue Jun 30, 2015 8:11 am

Because it was so easy to fit a .050 size header pipe to it from Sportwerks. I used 7mm ID silicon coupler.
Everything is off the shelf no making of anything also need 2mm x 20mm bolts. You can do the same thing
to a Norvel Eyebrows
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Mad Re: Tee Dee Performance Crank

Post  getback on Tue Jun 30, 2015 8:45 am

that's very impressive 1/2A nut , enjoyed the video thanks , Eric Thumbs Up Flying
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Mad Re: Tee Dee Performance Crank

Post  balogh on Tue Jun 30, 2015 1:24 pm

1/2A Nut wrote:Because it was so easy to fit a .050 size header pipe to it from Sportwerks. I used 7mm ID silicon coupler.
Everything is off the shelf no making of anything also need 2mm x 20mm bolts. You can do the same thing
to a Norvel Eyebrows

I would do so should my 061 Norvel have the threaded holes on the exhaust to fix the header pipe....I have this simple COX exhaust that will fit with a silicone tube to the tuned pipe that I plan to pick up from Alberto, and attempt to do a similar experiment with a non-SPI TD 050 or similar...thanks for the tips, though.
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Tue Jun 30, 2015 2:31 pm

There are no threaded holes on the AP .061  note in the photo the black steel strap on the opposite side of the engine you can do the same it is easy. 2mm x 20mm bolts and nuts as the header pipe is 2.5mm threaded but the bolts on the side would rub so 2mm bolts work best. You can make the 2.5mm bolts work but will take filing a small groove about .25 mm.

I tried this with an AP .061 because I have two new ones in their boxes.. I have 3 Norvels too but would rather experiment with the cheaper AP engines. If fun to do and the 1/2A plane sounds cool on a tune pipe.

Note in the vid how the idle is very smooth for RC use.

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Mad Re: Tee Dee Performance Crank

Post  balogh on Tue Jun 30, 2015 2:47 pm

Thanks, this is the exhaust design of my - infamous - NV061.



I still need to understand how the header pipe mounts on it with the bolts you mentioned. The only bolts I have are the ones keeping the cylinder to the crankcase.
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Tue Jun 30, 2015 3:11 pm

Yes I have the same lip on the AP .061
Filed it down smooth and used a gasket
two 2mm x 20mm bolts one on each side with nuts
one rear back steel strap




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Mad Re: Tee Dee Performance Crank

Post  balogh on Tue Jun 30, 2015 3:43 pm

I got it now how...thanks
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Thu Jul 02, 2015 9:52 pm

Did you get a response from Alberto, I thinking about ordering some of his spinners as they require custom cutting for either a single blade or standard two blade. Also may go ahead and order another spare pipe. I want one for my Norvel .074 the pipe was custom made for the .061 so the .074 should do just fine with it in fact up to a 09 /.10 size engine should be fine.


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Mad Re: Tee Dee Performance Crank

Post  balogh on Thu Jul 02, 2015 10:37 pm

Nope....he is silent. I will send him a reminder.



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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Fri Jul 03, 2015 9:41 am

About 3 mos ago he told me he would be placing an order for more of everything. He had bought about 150 units of the .061's and they only took about a year to sell out. I had asked then for spinners, he was out of them at the time. He told me he would be getting in more spares of spinners and pipes. Last buyer said engine arrived ok on June 25th.


Last edited by 1/2A Nut on Fri Jul 03, 2015 9:59 am; edited 1 time in total
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Mad Re: Tee Dee Performance Crank

Post  balogh on Fri Jul 03, 2015 9:48 am

Thanks.. I also offered him to meet him in Florida to facilitate business, where I happen to be on different business trips in August and September but he has not reacted so far. He either has not seen my message or is out of stock of pipes for the time being.

Till then I continue my experiments with a 051-reedie combo naked of any performance booster, on my Lil' Roughneck. The TeeDee-Reedie combo seems to be happy with fewer shims down to 3 or even 2 for some reasons. Maybe the fuel-air charge in the cylinder with a reed valve instead of a rotary valve outfit is less, and will tolerate higher compression?
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Fri Jul 03, 2015 10:00 am

I have been using 1 shim with a high compression head on my TDs with 20% castor and 25% nitro. I prop the engines with 4x4.75 and 4x4.5's so far 1 shim is best for highest rpm's possible. I would only see a need to shim if for very hot weather, 40% nitro or for larger prop diameters.

Option:

http://technohobby.com.ua/online-shop/en/engine-profi-08cc-12-f2
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Wed Jul 22, 2015 9:07 am

I have started another one called the Skorch II
This will work for various engines from 90g to 160g shown here with a TD .15 Special / throttle sleeve on the nose.
2ft / 24in long fuselage 32in span. 130sq. Also can be flown with a TD or Medallion .09 with exhaust throttle and a Fuji .050 with Profi pipe.
6 x 6.5 at 22,100 / 136 mph.
6 x 7 at 21,400 / 142 mph.

Small Cox Logo
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Mad Re: Tee Dee Performance Crank

Post  balogh on Wed Jul 22, 2015 2:18 pm

Looks great!!! Looking forward to seeing how it goes thru the metamorphosis i.e. getting fully fledged with wing etc...

I am also shaping the firewall of my new planes to accomodate the full spectrum of my 020-049-051 options just to give the bunch of my NIB engines sitting preserved, feeling desolate, some tasks..and rekitting "chances" for myself. My metamorphosis from collector to a more extensive, we-only-live-once user.
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Wed Jul 22, 2015 9:04 pm

Lol yes we can not simply collect them as long as we are able to stand up and walk out to the flying field to fly. Those engines that survived use will have there own inherent good memories to reflect on and can be cleaned up and put in the display case. Of course they could be ran up on the bench for fun at anytime.

Thank you Balogh. Here is the link to the Skorch II thread, starts on post #649. Small Cox Logo
http://www.rcuniverse.com/forum/1-2-1-8-airplanes-70/11602404-ply-rolled-fuselage-part-deux-1-2a-mini-skorch-26.html

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Mad Re: Tee Dee Performance Crank

Post  AUjack2003 on Wed Jul 22, 2015 10:20 pm

Your scorches look amazing and the fly so well!!
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Mon Oct 05, 2015 8:04 pm

Hey guys I have the Skorch II test flown did it Sunday here is a vid.
Used a 5x3 for extra thrust 18.6oz needed it to climb out quick
and give me time to trim it up.
Power is by a Vertigo .07 converted car engine with Profi pipe.



https://www.youtube.com/watch?v=h47Vosb0JFE

Published on Oct 4, 2015

APC 5x3 88F light breeze under 6mph
4.1k to 5.2k --idle
25.25k --------in the hand best read peaked then reduce a bit rich
24.6k to 24.9k set tad rich ready for launch
28.47k -------- best pass 81 mph
27.3k ----------average pass 78 mph
26.54-----------slowest pass 75.4 mph

Will try:
4.75x4  for around 105
4.5x4 110 mph
4.2x4 30.4k rpm / 115mph
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Mad Re: Tee Dee Performance Crank

Post  akjgardner on Mon Oct 05, 2015 8:23 pm

nice flight ,
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Mad Re: Tee Dee Performance Crank

Post  balogh on Tue Oct 06, 2015 12:12 am

Nice video and like always, a beautiful plane. I was wondering if a TD049 could rev the same prop at near 24k with the tuned pipe unloaded in air?
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Tue Oct 06, 2015 1:34 am

I have not tried the TD with a 5x3 prop I rarely use a 3 pitch prop just as you can see I had to spin 28.47k just to hit 81 mph. At 24k you would only go 68 mph or 109.4 kph.
Note my AME Norvel with Profi pipe with a
5x3 will spin it 23.8k static.
4.5x4 / 24.2k static
4.2x4 / 25.5k static and 28.3k unloaded

Further back in the thread I posted results for the cox engine using 4.5x4 and 4.75x4  Small Cox Logo

APC 5x3 creates more load by design than a cox 5x3

Pic of prop on the top


Converted Vertigo .07
Before and after pic


1/2A Skorch with a AME Norvel .061 and Profi pipe



Published on Aug 10, 2015
.061 AME Norvel on a Profi Tuned Pipe
Non SPI version with 150 deg exhaust timing
APC 4.2x4 2oz of bench running prior to first flight
In the hand 25,436 / 96F summer day
Best level pass 27.683 / 105 mph
12oz all up weight 5ch plane with flaps
88sq. in 28in span
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Mad Profi tuned pipe?

Post  happydad on Tue Oct 06, 2015 1:53 pm

1/2A Nut wrote:Hey guys I have the Skorch II test flown did it Sunday here is a vid.
Used a 5x3 for extra thrust 18.6oz needed it to climb out quick
and give me time to trim it up.
Power is by a Vertigo .07 converted car engine with Profi pipe.



https://www.youtube.com/watch?v=h47Vosb0JFE

Published on Oct 4, 2015

APC 5x3 88F light breeze under 6mph
4.1k to 5.2k --idle
25.25k --------in the hand best read peaked then reduce a bit rich
24.6k to 24.9k set tad rich ready for launch
28.47k -------- best pass 81 mph
27.3k ----------average pass 78 mph
26.54-----------slowest pass 75.4 mph

Will try:
4.75x4  for around 105
4.5x4 110 mph
4.2x4 30.4k rpm / 115mph

Is the profi tuned pipe still available somewhere?

Happydad  RC Plane
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Mad Re: Tee Dee Performance Crank

Post  1/2A Nut on Tue Oct 06, 2015 3:01 pm

http://www.hobbyclub.com/index.php?main_page=product_info&products_id=1610

You can try and contact the folks at the above link for replacement pipes.


I bought two off of eBay from Speeddomingo a while back reference to him in this thread.
The seller has not stocked any in a while now.


Hot news:
1-949-425-1362 he said a shipment is on order for spare pipes will take about 2 months from now.
Build time and shipping is slow from: Profi Engines (Ukraine)
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Mad OGDollars

Post  happydad on Tue Oct 06, 2015 3:12 pm

1/2A Nut wrote:http://www.hobbyclub.com/index.php?main_page=product_info&products_id=1610

You can try and contact the folks at the above link for replacement pipes.


I bought two off of eBay from Speeddomingo a while back reference to him in this thread.
The seller has not stocked any in a while now.

3X WOW that's a lotta dough. Thank You leaves me a little dizzy. Burning CashMoney Toss  Burning CashMoney Toss  Burning Cash

or as I say, not on my retirement budget. Thanks for the info.

happydad RC Plane
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Mad Re: Tee Dee Performance Crank

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