Guest Posted October 23, 2007 Share Posted October 23, 2007 Hello all, i am thinking of buying one of these tiny tach units for my parajet. Has any one got one of these already, and if so do you have any comments. I have been quoted £35 for the standard 2 second update or £45 for the 1/2 second update commercial model with service reminders and rpm upto 20000. I would really like a small anologe version but i cant find anything to suit. Likewise cant wait till xmas i want a strobe light, the microavionics work ok but thier not very pretty, has any one found a more "gucci" unit they can recommend? Cheers Simon. Quote Link to comment Share on other sites More sharing options...
Guest Posted October 23, 2007 Share Posted October 23, 2007 I use a tinytach and find it absolutely invaluable. I also run a CHT and EGT gauge so between these I can always keep an eye on the state of tune of my motor and reduce the risk of a sieze. Bearing in mind they are so cheap to buy and easy to fit I think everyone should at least run a tach and CHT gauge. Quote Link to comment Share on other sites More sharing options...
dantheman Posted October 23, 2007 Share Posted October 23, 2007 Tach is definately worth the cash, got one off ebay for £25, I don't think the fast update model is really worth the difference. I reckon down the line you will get your money back when you sell your motor as you should be able to prove the engine run time, hence increasing the motors value*. Ask Simon for one as he can get them cheap. * Unless the battery goes flat in the meantime Quote Link to comment Share on other sites More sharing options...
norman Posted October 28, 2007 Share Posted October 28, 2007 Rob of Baydon Mowers does them too if you ask him nicely. He is a club member and what he doesn't know about two strokes and stuff probably isn't worth knowing. http://www.baydon.fsbusiness.co.uk/ Quote Link to comment Share on other sites More sharing options...
oisin Posted November 4, 2007 Share Posted November 4, 2007 Dan, Just read your early posting and noticed you are flying a H&E R120. I fly the same motor, and was thinking of fitting a tach. Can you tell me the model you went for? If it works well for you, it is good enough for me. Thanks Oisin Quote Link to comment Share on other sites More sharing options...
dantheman Posted November 4, 2007 Share Posted November 4, 2007 Oisin, good question, I just bought one that was for a 2 stroke engine, no idea what model number it was and it has no serial number on it. Avoid one with the R for reset as it would be easy for someone to reset the hours. Good luck in your quest.... Dan Quote Link to comment Share on other sites More sharing options...
admin (Simon W) Posted November 4, 2007 Share Posted November 4, 2007 I have one on my shelf for a 2 stroke but by the time you add the postage you would be better off finding a local source or go for E-bay. 2072NR* is the number on the back of the one on my shelf. Loads of people around here use them From what I have seen, the rev counter is next to useless but the hours works well. SW Quote Link to comment Share on other sites More sharing options...
bendmeroundthehedge Posted January 20, 2008 Share Posted January 20, 2008 Bit of information you might find saves a lot of frustration. There are three different types of Tiny-Tach, you need to make sure you purchase the right one for your machine. 1C - used on engines that have a spark firing every 180 degrees. 2C - Used on engines with one spark firing on each revolution of the crankshaft. Also used on 4 strokes with electronic ignition. Bendme Quote Link to comment Share on other sites More sharing options...
martinbg Posted January 20, 2008 Share Posted January 20, 2008 There are three different types of Tiny-Tach, 1C and 2C is just two types surely? Quote Link to comment Share on other sites More sharing options...
dantheman Posted January 20, 2008 Share Posted January 20, 2008 Martin stop being cheeky as it happens there are a few more variations on the theme, some are resettable but of course they are all cheaper from the US Quote Link to comment Share on other sites More sharing options...
bendmeroundthehedge Posted January 20, 2008 Share Posted January 20, 2008 Hi, Type 4C - now virtually obsolete is used for 4 stroke engines with points and distributor. If you manage to pick up a second hand Tiny-Tach that does not have a reset button, it is possible to reset it Bendme Quote Link to comment Share on other sites More sharing options...
oisin Posted February 3, 2008 Share Posted February 3, 2008 So it sounds like the one for my R120 is the: 2072NR* Still thinking about it, and with the sad weather here in Ireland recently, this is the time for me to fit it I think! Thanks for advice, Oisin Quote Link to comment Share on other sites More sharing options...
dantheman Posted February 3, 2008 Share Posted February 3, 2008 Oisin, on my travels I have seen the most popular H&E fitting location to be on the carbon fibre heatshield as such..... Quote Link to comment Share on other sites More sharing options...
oisin Posted February 10, 2008 Share Posted February 10, 2008 Thanks Dan, I have seen many with the tach mounted on the shoulder strap where you can read the engine revs? Hope to come to UK PPG nationals in May where I will have a good look around! Thanks, Oisin Quote Link to comment Share on other sites More sharing options...
Guest Posted February 11, 2008 Share Posted February 11, 2008 PAP mounted mine on the shoulder strap as standard but it was a bu99er to see so I moved it onto the throttle assembly. Much better. My CHT/EGT is now mounted on the flexible throttle cable line which works well as well. Can take a picture if it helps. Quote Link to comment Share on other sites More sharing options...
dantheman Posted February 18, 2008 Share Posted February 18, 2008 I am tempted to relocate mine to the bin, lasted about 3 flights and recorded my last flight as 20 hours, a reset cured this but not much use to record overall engine run time. Tiny tach's are now crap* *just my opinion which I believe I'm entitled to - from experience Quote Link to comment Share on other sites More sharing options...
dantheman Posted February 18, 2008 Share Posted February 18, 2008 By the way the model number was 3072R Quote Link to comment Share on other sites More sharing options...
spider Posted April 17, 2008 Share Posted April 17, 2008 Bit of information you might find saves a lot of frustration. There are three different types of Tiny-Tach, you need to make sure you purchase the right one for your machine. 1C - used on engines that have a spark firing every 180 degrees. 2C - Used on engines with one spark firing on each revolution of the crankshaft. Also used on 4 strokes with electronic ignition. Bendme Hi all, Probably a silly question, but as I don't know the answer, I ask it ! What one would suit the Parajet (volution). ie Does the engine fire every 180 degrees or on each crankshaft revolution ? Cheers Geoff Quote Link to comment Share on other sites More sharing options...
learner_driver Posted May 10, 2009 Share Posted May 10, 2009 it fires every 180 degrees, therefore one spark is wasted baa Quote Link to comment Share on other sites More sharing options...
fanman Posted May 11, 2009 Share Posted May 11, 2009 it fires every 180 degrees, therefore one spark is wastedbaa If the system has a HEIS fitted then that second spark is used to augment that so it is not wasted. Quote Link to comment Share on other sites More sharing options...
Phil_P Posted May 11, 2009 Share Posted May 11, 2009 it fires every 180 degrees, therefore one spark is wastedbaa If the system has a HEIS fitted then that second spark is used to augment that so it is not wasted. If it fires at bottom dead centre, then the second spark IS wasted, because there is no way firing anywhere near BDC will 'augment' combustion. In fact, the very last thing you want to do, is partially ignite the incoming charge close to BDC. Quote Link to comment Share on other sites More sharing options...
learner_driver Posted May 11, 2009 Share Posted May 11, 2009 Colin "of Pink thrust fame" and I needed to switch his rev machine to twin spark whilst looking at my revs compared to his. once the setting was changed everything worked champion, I just ordered one from Mr http://www.tinytachuk.com @ £39.99 for the 1C model Quote Link to comment Share on other sites More sharing options...
fanman Posted May 11, 2009 Share Posted May 11, 2009 If it fires at bottom dead centre, then the second spark IS wasted, because there is no way firing anywhere near BDC will 'augment' combustion. In fact, the very last thing you want to do, is partially ignite the incoming charge close to BDC. From an HEIS installation guide... Be careful! Your new H.E.I.S. will start very, very easy. It will only take 100 RPM’s versus 500 RPM’s to start. If you have a Tiny Tach you will have to get it recalibrated or exchanged for the "1-c" model because it's now getting a double spark and the "2-c" model will read twice the rpms. Your paramotor may get better fuel consumption and will be easier to start. ...so the second spark is a by-product of the HEIS set up. It isn't wasted because it the energy for the HEIS. Quote Link to comment Share on other sites More sharing options...
Phil_P Posted May 11, 2009 Share Posted May 11, 2009 If it fires at bottom dead centre, then the second spark IS wasted, because there is no way firing anywhere near BDC will 'augment' combustion. In fact, the very last thing you want to do, is partially ignite the incoming charge close to BDC. From an HEIS installation guide... Be careful! Your new H.E.I.S. will start very, very easy. It will only take 100 RPM’s versus 500 RPM’s to start. If you have a Tiny Tach you will have to get it recalibrated or exchanged for the "1-c" model because it's now getting a double spark and the "2-c" model will read twice the rpms. Your paramotor may get better fuel consumption and will be easier to start. ...so the second spark is a by-product of the HEIS set up. It isn't wasted because it the energy for the HEIS. Well if the HEIS is triggering two sparks together, then that might improve the flame front in the combustion chamber, but that is a very big might. The concept of wasted spark is when in a two stroke, the spark is generated every 180 degrees (ie around TDC and BDC). In a four stroke, a wasted spark is created because the engine fires every 360 degrees (ie, at TDC on both the compression and exhaust strokes). A twin spark system is nothing to do with wasted spark, it is usually used as a redundant system (as in GA aircraft) so a failure in one system won't mean a dead engine or cylinder. Seems like we are trying to compare apples and oranges here. Quote Link to comment Share on other sites More sharing options...
fanman Posted May 11, 2009 Share Posted May 11, 2009 Jeez, I'm not trying to compare anything with anything! I was just replying to the earlier post to say that if you have an HEIS and don't get that second spark then something is wrong. Quote Link to comment Share on other sites More sharing options...
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