Tanque

I use what seems to be a limited production, little documented variation of the original 1970/80s Webra Blackhead .40
that has a crankshaft drive 'power takeoff' for a fan. Webra ( or a contractor?) accomplished this by installing a crankshaft with a longer than normal crankpin, the extra protrusion of which is used to drive a shaft mounted in a dual ball bearing equipped mount that substitutes for the rear crankcase cover. I have a number of these engines in various of my (land based) models and they've performed so well over the years. Sturdy as the base Blackhead 40, easy to maintain and powerful enough to do the job intended.

I've found precious few, none actually, references to this engine. I thought I'd heard once that they were made up for Schulter, the one time rc heli company but found nothing to support this either.

My question is this. Do any of you out recall seeing write ups on this variation? Any and all references would be welcome.
While I'd welcome any examples of the engine as well that isn't my prime reason for posting this, I really would like to hear from others with experience and written material about this engine.

Thanks,

Jerry

Broken Wings

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Hb did the same thing, used in Helicopters and model boats. I believe they were called Stamo's.

Kmot

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I happen to have one of those HB versions. I will get pics for you later.

Tanque

I'd like to see that please.

Thanks.

Jerry

Kmot

My Feedback: (24)

Here you go Jerry:

Tanque

Thanks both of you for the photos.

I had a hand at flying helis in the late 70s through the mid 80s. I started with Kavan's models and they had the fan driven from the prop washer. Seeing these HB engines and the Webras that I have it seems they were not that popular were they? From my allpication they seem very compact and efficient. I'm not very engine savvy other than for a few specific types but it is odd these never really caught on, perhaps more costly?

My application is shown here:


And there are few engines that would serve the need as well as the Webra 40 euipped with the rear fan.

I'm actually engaged at the moment in replicating the parts for a regular version of the engine to convert it to this configuration.

Jerry

LeeHop

Tanque, I gotta ask...what is it?

rainedave

My Feedback: (1)

A paddlewheel boat? I'd like to know, too.

David

Kmot

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I want to see video of those machines running.

Kmot

My Feedback: (24)

It is a drive train for a tank:

http://www.geocities.com/pentagon/2828/jp.html

Tanque

They are ( there's two complete units) 3 fwd speed+1reverse transmissions for rc tanks. These are braked differential
transmissions. The Webra is started via self starter. Sort of a "power pack".

Here's one mounted and running in the lower hull of one of my models:


another vew:


While it looks as it was going fast it in fact wasn't but a crawl, top speed isn't very fast by design, but they are powerful.

Here's a video clip albeit not a very good of one of the models running( from the model's perspective):
[link=http://www.youtube.com/watch?v=s2XYYpiV1Ws]Panther in Action[/link]

I have more info on my website [link=http://www.geocities.com/Pentagon/2828/]Armor Group West[/link]


Jerry

Kmot

My Feedback: (24)

Darned video won't load.

Kmot

My Feedback: (24)

Tanque (Tank!):

The video on Youtube will not load. Not yesterday, not today. Perhaps you could upload it to RCU Videos?

LeeHop

Tanque's YouTube video worked for me...

Kmot

My Feedback: (24)

All I get is a rotating circle thing. Hmmm........ [sm=confused.gif]