peolini Posted November 19, 2015 Share Posted November 19, 2015 (edited) Can anybody please tell me what would the pointy sticks (Pointed out by the red arrow in the attached PDF) would be called in English. Unfortunately I can only provide a PDF file of it. Thank you very much in advance. Dennis Loep Marienflde Mistery Part.pdf Edited November 19, 2015 by peolini Typo Quote Link to comment Share on other sites More sharing options...
Great War truck Posted November 19, 2015 Share Posted November 19, 2015 I would call it a "Sprag". Quote Link to comment Share on other sites More sharing options...
lynx42 Rick Cove Posted November 19, 2015 Share Posted November 19, 2015 Can anybody please tell me what would the pointy sticks (Pointed out by the red arrow in the attached PDF) would be called in English.Unfortunately I can only provide a PDF file of it. Thank you very much in advance. Dennis Loep [ATTACH]110244[/ATTACH] Hi Dennis, It is called a SPRAG. It is used to stop the vehicle rolling backwards down a hill if they had to stop going up. It is dropped down and holds the vehicle as 1st gear is engaged and the clutch let out thus giving the driver more control of the vehicle. Regards Rick. Quote Link to comment Share on other sites More sharing options...
peolini Posted November 19, 2015 Author Share Posted November 19, 2015 Hi Tim and Rick, thank you for your very prompt replies. Sprags it is then. I did figure out by the construction, shape and position of them, what they would be used for and how. But I just could not find the proper name for them. It is a German Daimler Marienfelde truck. I have done the 3D design work for a 1/32nd scale construction kit of it. For the partslist in the instructions I needed the name of the "pointy sticks" the kit is produced and sold by Aviattic. http://www.aviattic.co.uk/news.html http://forum.largescaleplanes.com/index.php?showtopic=58490 By the way, Tim. I was intrigued by your Dennis restauration. Wonderful reading- and watching-stuff. Made my fingers itch. Bu then it also might be a name thing. thank you both very much, Dennis Loep Quote Link to comment Share on other sites More sharing options...
andypugh Posted November 20, 2015 Share Posted November 20, 2015 Hi Dennis, It is called a SPRAG. It is used to stop the vehicle rolling backwards down a hill I was told many years ago that they are illegal to use in the UK nowadays. (this makes some sense, poking holes in tarmac is likely to be unpopular). So you can probably have them fitted, but shouldn't deploy them. Not directly related, but I did a trailer-towing course over the summer, and one useful technique taught there was to deliberately jack-knife the trailer if you are having trouble getting going on a steep hill, so that you can get the towing vehicle rolling and the clutch engaged before the trailer starts to move. (My job sometimes involves towing special trailers up the highest mountains we can find): http://mustangae.com/products-services/towing-dynamometers/carsuv-tow-dynamometer/?prod=Car%2FSUV+Tow+Dynamometer Quote Link to comment Share on other sites More sharing options...
Charawacky Posted November 20, 2015 Share Posted November 20, 2015 I have experience with a sprag; Had the car I was driving not been fitted with a sprag it would have rolled backwards been written off! The hill was too steep for the car when carrying passengers and even the driver. In the end I had to walk along side whilst controlling the vehicle! The other use of a sprag is to hold a vehicle when winching typically with an old Foden STG5 (1935 to 1947)which when a full strain would only have the sprag touching Terra Firma until the cable breaks. Quote Link to comment Share on other sites More sharing options...
andypugh Posted November 20, 2015 Share Posted November 20, 2015 I have experience with a sprag; Had the car I was driving not been fitted with a sprag it would have rolled backwards been written off! Band brakes by any chance? Quote Link to comment Share on other sites More sharing options...
Tony B Posted November 20, 2015 Share Posted November 20, 2015 Have to say it beats running behind getting covered in wheel spin trying to throw chocks behind wheels. Old horse drawn carrages had the opposite. Blocks whereplaced in front of the wheels going down hill to prevent them running away. Quote Link to comment Share on other sites More sharing options...
Great War truck Posted November 20, 2015 Share Posted November 20, 2015 That is a super model. Where did you get the drawings to make such a fine model? Quote Link to comment Share on other sites More sharing options...
Charawacky Posted November 21, 2015 Share Posted November 21, 2015 Band brakes by any chance? One single foot operated band brake for forward movement and one single heel operated band brake (drum 3/4 " wide and 2.5" diameter) for reverse movement. Must be degreased with petrol before use or it runs away. No Handbrake at all Steering by Tiller 12" diameter wood rimmed hand-wheel (where a steering wheel is normally placed) for gear changing, clockwise 1st gear anticlockwise 2nd gear. Speed control by changing ignition timing. Fixed throttle Passenger facing driver You really do not want to know any more, and we are getting off subject. Quote Link to comment Share on other sites More sharing options...
Charawacky Posted November 21, 2015 Share Posted November 21, 2015 Have to say it beats running behind getting covered in wheel spin trying to throw chocks behind wheels. Old horse drawn carrages had the opposite. Blocks whereplaced in front of the wheels going down hill to prevent them running away. Chocks in front of wheels, how did that work, must have been a bit bumpy! Quote Link to comment Share on other sites More sharing options...
Tony B Posted November 21, 2015 Share Posted November 21, 2015 Chocks in front of wheels, how did that work, must have been a bit bumpy! They were, well, still are quite large wedges. As the wheel moves down hill there is friction on the block to slow the caraige. Bear in mind the horses have the weight pushing on to them in this case. If they go down, major brake failure. :shocked: Modern carriagies have disc braes. Quote Link to comment Share on other sites More sharing options...
peolini Posted November 21, 2015 Author Share Posted November 21, 2015 That is a super model. Where did you get the drawings to make such a fine model? Thank you for the compliment. I requested and got one set of generic drawings with dimensions from Daimler Benz. All the rest of the details come from pictures I found digging the internet. And I tend to get lost in the details. Although nothing can be seen of it, unless you turn the model up side down, there is a complete(ly) detailed suspension and drive train underneath, accurate upto every nut and bolt. If I ever get the chance to make a Dennis truck, I know where to run to ;0) Cheers, Dennis Quote Link to comment Share on other sites More sharing options...
peolini Posted November 21, 2015 Author Share Posted November 21, 2015 One single foot operated band brake for forward movement and one single heel operated band brake (drum 3/4 " wide and 2.5" diameter) for reverse movement. Must be degreased with petrol before use or it runs away.No Handbrake at all Steering by Tiller 12" diameter wood rimmed hand-wheel (where a steering wheel is normally placed) for gear changing, clockwise 1st gear anticlockwise 2nd gear. Speed control by changing ignition timing. Fixed throttle Passenger facing driver You really do not want to know any more, and we are getting off subject. What monstrosity would this be then? I would love to get to drive/control the thing you described here. Cheers, Dennis Quote Link to comment Share on other sites More sharing options...
BillyH Posted November 21, 2015 Share Posted November 21, 2015 Chocks in front of wheels, how did that work, must have been a bit bumpy! More of an iron shoe, dropped in front of wheel , wheel rolls onto it and slides along. lots of friction , shoe wears not the iron rim. Will hunt up a photo. Quote Link to comment Share on other sites More sharing options...
andypugh Posted November 22, 2015 Share Posted November 22, 2015 You really do not want to know any more, and we are getting off subject. I think we can be pretty sure that the device being described is Pre WW2. Almost certainly Pre WW1. I wouldn't be surprised to find Pre Boer War? Quote Link to comment Share on other sites More sharing options...
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