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Post  Mark Boesen Sun Dec 14, 2014 11:28 pm

Yesterday someone was asking about the size of Comet props, and i can't find the post?
The most common size was 5x3, there's a lot of later red props this size around with no Kaysun logo floating around, 5.5x4 was also used.

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Post  1/2A Nut Mon Dec 15, 2014 12:27 am

http://www.ebay.com/itm/VINTAGE-OK-CUB-049K-KIT-ENGINE-MODEL-AIRPLANE-ENGINE-U-C-F-F-NIB-RARE-/381084225310?pt=Radio_Control_Parts_Accessories&hash=item58ba63cf1e

Posted in this thread: Re: Off Site: Olympic .15 Drum Valve

I had mentioned I have some of these red props came with a grab bag of other props on ebay in the assorted mix there was some plain looking Blue ones too perhaps they are comet props too 6in in dia again no markings for pitch.. perhaps they are 6 x 2? when I saw the cub kit with prop I figured the prop might be made by the cub folks just for their engine. Thank you Mark for pulling this up was a great mystery on the pitch.
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Post  Oldenginerod Mon Dec 15, 2014 12:56 am

Last time I purchased some parts off OK Engines I got a couple of these red styrene props. I can't recall the size but I know they didn't have the KaySun symbol. I just got them for display purposes. They seem pretty brittle so I wouldn't use them. I also got a red KaySun to suit a Cub .099 but it split in half through the hub just by doing up the prop screw. A disaster waiting to happen. Thumbs Down

Rod.
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Post  1/2A Nut Mon Dec 15, 2014 8:20 am

Affraid or WOW! Wow Rod that doesn't sound good, I never considered actually using them do to their overall design and weight. I have kept them bagged so the plastic doesn't dry out; once I mounted a prop on a 1/2A engine to see what they looked like on the hub held up all of them seem to be in great shape. I will consider them a just a collector prop.


Last edited by 1/2A Nut on Mon Dec 15, 2014 2:21 pm; edited 1 time in total
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Post  Mark Boesen Mon Dec 15, 2014 11:04 am

The early Kaysun props used by both Thimble-Drome and later by Comet, were more of a shiny, hard plastic, that's probably what you had that split.

Somebody later made some without the Kaysun logo (these seem to multiply at swap meets years ago, nobody wanted them and everybody had 'em) I'm guessing Herkimer had 'em made and when they stopped production of engines in the early sixties they had a bunch left in inventory. These later ones were a softer plastic, probably safe, but not a very good prop, lots of flex and probably a poor design.
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