What are the top 10 Rarest Cox Engines?

...i wanted to beat Mud to this, as he'll know more then anyone.

(Guess based on actual production and surviving engines)

1. Strato Bug blue tank
2. first (very first) version RR-1
3. gotta be something?
4.very first version Babe Bee (tapered tank screwheads)
5. ?
6. ? yellow Strato Bug
7. ? Red Strato Bug
8. ?
9. ?
10. ?

I see I'm very off here.

Not in any order:

Olympic .15 Rear Drum Valve Prototype
NFFS .051 Medallion
Venom
Tee Dee RC05
Tee Dee RC09
Strato Bug
Space Hopper
Babe Bee .049 with the windback starter
O Fourty Five tether car engine
O Sixty tether car engine
Build your own .020 Pee Wee kit

Others:

Blue/Silver RR-1 first issue
RC Bee

What are tapered tank screw heads on a baby bee?

I know this is really, really subjective, but if you say rarest, you'd have to figure basicly impossible to find or locate, based on actual production and surviving engines. My problem with the NFFS .051 Medallion & Venom is that although very few were made, you can still find one to purchase fairly easy...if you got da money. Who has a blue Strato or first version RR-1 for sale?

jjscott wrote:What are tapered tank screw heads on a baby bee?

Soon after production started it was discovered the tank backs were leeking and had to be redone, its a minor thing but its still a rare version.

This Forum is unique and awesome all rolled into one...Never seen a group a guys like this before...Best Cox Information/Site in the World. Love this stuff!!

I have a couple of Cox engines that might move the rare meter.
The first is an early TD.049 with a brass cylinder. It is not colored or anodized, but, has the reddish brass color,and it is not magnetic either. There is a large #1 stamped on the side of the cylinder.
The second is a Pee Wee .020 Sure Start with a white Delrin back plate and an orange choke tube. There is a #2 etched in the side of the back plate.
In both cases I'm guessing the numbers are factory work numbers for experimental engine pieces.
Maybe Mud Hen can shed some light on my engines.
I'll try to get some pics shortly for all to enjoy......

wow, i'd love to see those photos!

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Well, there we have it. The top 10 rarest Cox Engines! Thanks Mud!

I have more than my share of BW#1 and TD#4 cylinders and I know how they are marked at the factory. The brass cylinder has the #1 stamped at the base of the cylinder and it has two bypasses and two machined flutes on each bypass just like a normal #4 piece.

I should also mention the NIB Cox Tissan/Haifa .049 Banana engine I have with the Funky black prop spinner and the factory sealed tool, mounting screws, and sand brush kit. It has never been removed from the display card in a Yellow and Orange box. The box is different from what Jacob shows in his display card section. Bernie may be able to find out from his contacts at Tissan Haifa in Israel how many of the early Banana engines made it to the USA.

How about High Compression 5 fin Texaco heads complete with the knurled ring on top and the 1702 combustion chamber? I got those from Dan Sitter years ago and I've not seen any others since.

I'm learning my new digital camera and how to post pics here so bare with me and you'll see what I'm talking about............Steve

66 Malibu wrote:I have more than my share of BW#1 and TD#4 cylinders and I know how they are marked at the factory. The brass cylinder has the #1 stamped at the base of the cylinder and it has two bypasses and two machined flutes on each bypass just like a normal #4 piece.

I should also mention the NIB Cox Tissan/Haifa .049 Banana engine I have with the Funky black prop spinner and the factory sealed tool, mounting screws, and sand brush kit. It has never been removed from the display card in a Yellow and Orange box. The box is different from what Jacob shows in his display card section. Bernie may be able to find out from his contacts at Tissan Haifa in Israel how many of the early Banana engines made it to the USA.

How about High Compression 5 fin Texaco heads complete with the knurled ring on top and the 1702 combustion chamber? I got those from Dan Sitter years ago and I've not seen any others since.

I'm learning my new digital camera and how to post pics here so bare with me and you'll see what I'm talking about............Steve

Let me know if you need any help posting pictures.
https://www.coxengineforum.com/t367-how-to-post-an-image-in-a-topic

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I have a number 4 cylinder that is not stamped. It is tapered, 2 transfer ports, 2 boost flutes per cylinder and thin walled. Currently resides on my silver/blue RR-1.

Seems to be a lot of different variations on the early stuff.