TD .049/Medallion .049 differences

Ron:

I was looking for something more substantive than a preference.

One cost more to produce and to buy.

Why?

SD - Master of the Socratic method of instruction

SuperDave wrote:Ron:

I was looking for something more substantive than a preference.

One cost more to produce and to buy.

Why?

SD - Master of the Socratic method of instruction

Dave,

You kill me..........

Almost everyone here knows the differences. These engines have been around since the early sixties. I say almost as some may not.

What makes one better than the other? That is really up to the owner. I bet there are guys on here that prefer the Medallion over the TD.

I think the main differences are crank, cylinder porting and head. The Medallion venturi is said to flow better.

I think in some applications the Medallion may actually excel over the TD.

BTW, I own every TD from .010-.15 with the exception of the MKII.

I am a TD fanatic!

It's all about horse power and bragging rights as usual...

Surfer_kris wrote:It's all about horse power and bragging rights as usual...

Lol Kris,

True, numbers don't lie. My position is that both are very good engines. What makes them better to one person may not be so for the next.

Based on pure stand alone performance the TD is clearly the winner.

Now that I look at it closer the Medallion test was done on 15% nitro and a year later. I wonder what the Medallion would have done if tested on the same day same 25% fuel as the TD?

Ah, I see side-tracking evasions of my central question.

There are internal differences between the two engines. What are they? (Those differences caused the TD .049 to be more expensive to produce and purchase)

Main internal difference is of course the rectangular inlet on the TD versus
drilled inlet on Medallion.
John

proctor:

That's one, good for you!

But there are others...............................

Dual boost and bypass flutes on the TD. Plain dual bypass on the Medallion with no boost flutes.

Boost flutes on the tee dee.
Larger square crank port.
Higher impressions head.
And a "better" intake.

Matt and Indra have SCORED! Nice job, lads! You've done yourselves proud.

(They undoubtedly had to dig for those answers which was my intention originally)

Was the inlet tract in crankshaft drilled larger? or additional boost ports in TD cyl?
There was a higher parts count of course on TD carb.
Apart from carb was there actually significant additional production costs for
TD or was it simply priced higher because modelers wanted a more powerful
engine.
John

Sorry you beet me to it, I have not mastered save/ modify thing yet when posting

SuperDave wrote:Matt and Indra have SCORED! Nice job, lads! You've done yourselves proud.

(They undoubtedly had to dig for those answers which was my intention originally)

Actually Dave....

I Noted the differences in one of my first replies.

I just didn't provide that level of detail.

Dave,
No digging involved its common knowledge and Ron did get there first I think.

Indra:

As to common knowlege, remember there a bunch of people on the forum that probably don't share the level of expertese as the experienced here. I write in an attempt to bridge those differences.

BTW, what is the median age level here?

SuperDave wrote:Indra:

As to common knowlege, remember there a bunch of people on the forum that probably don't share the level of expertese as the experienced here. I write in an attempt to bridge those differences.

BTW, what is the median age level here?

Good question I bet it's around 45yrs.

microflitedude wrote:Dual boost and bypass flutes on the TD. Plain dual bypass on the Medallion with no boost flutes.

The Medallion #2 cylinder only had one bypass.

Of course I took it off of mine and replaced it with a Killer Bee style SPI cylinder/piston set.

cribbs74 wrote:

SuperDave wrote:Indra:

As to common knowlege, remember there a bunch of people on the forum that probably don't share the level of expertese as the experienced here. I write in an attempt to bridge those differences.

BTW, what is the median age level here?

Good question I bet it's around 45yrs.

About 41 - 42.

RknRusty wrote:

microflitedude wrote:Dual boost and bypass flutes on the TD. Plain dual bypass on the Medallion with no boost flutes.

The Medallion #2 cylinder only had one bypass.

Of course I took it off of mine and replaced it with a Killer Bee style SPI cylinder/piston set.

So there were a few variations? Maybe the one I saw had a misplaced cylinder.

I see now, it was the RC version that had the dual bypass cylinder to compensate for power loss. The standard, like you said, had one port.

I believe that all but the very latest Tee Dees had a taper bored cylinder. I do not think any Medallaions did.

fit90 wrote:I believe that all but the very latest Tee Dees had a taper bored cylinder. I do not think any Medallaions did.

True, Fit, I was just hesistant to mention yet another difference taught me by Paul Gibeault of "mouse racer" fame when I bought his "Jewel Case" TD .049 recently.

If you look closely, you can see some flaws in the data that show some inconsistency. For instance, one medallion uses 30% nitro and the TeeDee used 25% nitro, while the rest use 15%. The difference in years will also affect data as well.
There is a margin of error here that I would say renders this chart unusable for power output.

I think if you set up a test stand and test all the motors at the same time, with the same fuel, that the motors will start to appear to put out the same power. The Tee Dee would have a higher power band, but I would think it should be closer to the others in power output.

cribbs74 wrote:

Surfer_kris wrote:It's all about horse power and bragging rights as usual...

Lol Kris,

True, numbers don't lie. My position is that both are very good engines. What makes them better to one person may not be so for the next.

Based on pure stand alone performance the TD is clearly the winner.