Ian w Posted June 11, 2014 Share Posted June 11, 2014 Me and my Octane 2 Quote Link to comment Share on other sites More sharing options...
Mr Brightside Posted June 11, 2014 Share Posted June 11, 2014 ^^^LOL^^^ Quote Link to comment Share on other sites More sharing options...
mydoddy69 Posted June 11, 2014 Share Posted June 11, 2014 This thread has gone a little cold hope that's not another bad sign ? Any luck on the returns or running ?. Quote Link to comment Share on other sites More sharing options...
Ian w Posted June 11, 2014 Share Posted June 11, 2014 (edited) This thread has gone a little cold hope that's not another bad sign ? Any luck on the returns or running ?. Not heard anything from MSUK as yet probably give them a call tomorrow to see what is happening I think it`s gone cold `cause as far as I can see there are only three owned on the forum and two of them are back at MSUK Edited June 11, 2014 by Ian w Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 11, 2014 Author Share Posted June 11, 2014 I've not been here lately 'cause I have nothing to report as I've not had chance to run mine again since I began the thread. But, all being well, I'm going to give it another run tomorrow evening. Hopefully I'll complete at least another two tanks of fuel through, which will take it to 4, after which we'll do a bit of tuning.... Harvey Quote Link to comment Share on other sites More sharing options...
Ian w Posted June 12, 2014 Share Posted June 12, 2014 Update on my Octane. It has been back to HPI worked on and is now hopefully working well. They are not saying what was wrong. Early next week it will be back with MSUK they are going to further check it then back to me. So hopefully happy days Quote Link to comment Share on other sites More sharing options...
(-:AD:-) Posted June 12, 2014 Share Posted June 12, 2014 (edited) thats good C/S from modelsport. Hope you get it sorted... theese 1/8 petol engines are a good step foward for the hobby. Edited June 12, 2014 by (-:AD:-) Quote Link to comment Share on other sites More sharing options...
Ian w Posted June 12, 2014 Share Posted June 12, 2014 All Praise for MSUK (Dave and Andy) all brilliant support. 2 Quote Link to comment Share on other sites More sharing options...
Ian w Posted June 12, 2014 Share Posted June 12, 2014 An Octane and honest opinion 1 Quote Link to comment Share on other sites More sharing options...
Tug Posted June 13, 2014 Share Posted June 13, 2014 So he likes it, despite its slow top speed. Looking more promising these days. 1 Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 13, 2014 Author Share Posted June 13, 2014 As indicated earlier, I ran mine again last night. After completing the first tank (its third) I decided that the time had come to do some tuning. So, following the instructions in the manual, I began to progressively lean out the high speed needle and after several small adjustments, got to the point where in the middle of a full throttle run it would break out of 4 stroking into 2 two stroking, at which point it would take off like the proverbial scolded cat going up through the gears as it did so. The problem was that this transition was not predictable and several times I nearly ran out of road because of it (during which I confirmed that it was very good at doing stoppies(!)). After several runs and adjustments, I brought it back to the 'pits' to have a think about it. My conclusion was that in the previous full throttle runs it was probably only running on the low speed needle, but with the engine having freed off a bit, because of the slope on on certain points of the trackway, it would get onto the high speed needle, at which point, because I had been leaning it out, it went into proper 2 stroking and I got the jump in performance. I therefore decided that in spite of instructions in the manual not to do so, to begin leaning out the low speed needle. I managed a few runs, progressively leaning it out before the second tank ran dry, and everyone wanted to go home. By this time I had achieved a significant increase in performance with an earlier transition to proper 2 stroking but had not yet got to the point of finishing the tune. So my next step will be to get out there and do some more runs, progressively leaning out the LSN until it runs properly 2 stroking, not 4 stroking. Before I do this, however, there are several things I want to do:- 1) Give it a thorough going over the make sure that all the screws are still tight. 2) Check the pinion mesh (I've no reason to believe that there is anything wrong, but I won't hurt to be sure). 3) Check the plug and possibly replace it (its the same as used in the Baja and I have several spares) 4) Change the radio to a better one. In regard to (4), the tx provided in the kit is OK, but as with nearly all radios provided with RTR models it is pretty basic and I usually end up changing to something a bit better. I have 3 channel Flysky/Annsman/Absima rx's in my Maverick XB, BajaSS and Savage X which I use with an Absima CR3P tx and I have several pare rxs of this type. But for some time I have had a very nice Absima CR4T in my workshop and I intend to move over to this because of its significantly improved facilities and ease of set up. So I'm going to install an Absima 3 channel rx in the Octane (the 4 channel rx is a bit bigger and I don't see the need for the telemetry stuff) and use the CR4T tx with it. In due course I will also rebind the rx's in my Savage X , Maverick and Baja to this tx. Conclusions? Well I'm getting there, but I'm taking my time and thinking carefully before making changes. But make no mistake, when this thing gets into '2 stroke' mode and shifts up through the gears, it really goes, and like I think someone else said recently, this model certainly has considerable potential. Oh and yes it certainly is LOUD. Harvey Quote Link to comment Share on other sites More sharing options...
Bowerz Posted June 13, 2014 Share Posted June 13, 2014 Sounds good Harvey, glad to hear more people are getting success with this! With regards to radios, would suggest doing some testing before you take it for a run and make sure some kind of failsafe is setup as many people are getting issues with different radio's with these, maybe from the EMI of the CDI box? Just another thought, I guess you can install a conventional killswitch to these as all they do is ground out the spark? Are the connectors all the same? Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 13, 2014 Author Share Posted June 13, 2014 (edited) The possible interference from the cdi box is something I had not thought about as you say looks like some testing is needed, but I doubt the the HPI radio system is that special in this regard. In regard to the kill switch ... this is one area that has been exercising my mind, having had one incident with a Maverick MT2 where a potential run away was prevented by the kill switch. A conventional kill switch would not work, as these are designed to short out the low tension side of the coil not the high tension (spark) side. I have been thinking about using the third channel to drive a miniature servo connected to a micro switch in series with the cdi slide switch. It would obviously not work if you lost radio contact, but it would give you the ability to kill the engine remotely via the tx. Its only a 'pipe dream' at the moment, but I have a couple of miniature servos from my model aircraft days, and being a radio amateur, I have some knowledge and skills in electronics and wiring which should enable me to rig something up. Actually, as I think about it, ideally you would not use a servo/micro switch combination, but some form of electronic device plugged in to the third channel, which operated an electronic switch or reed relay (it would probably have to be the latter because of the voltage drop inherent in solid state switches) ... must give this some more thought.... actually actually (thinking while I'm typing this) what you want is a sort of kill switch in reverse. i.e one that had its switch CLOSED when all was OK but opened when something was wrong or you pressed the switch on the TX. The only stopper from using one based on an existing design may be the current draw of the CDI which is probably much more than that of the low tension side of a conventional coil system...should be able to roughly calculate this from the battery capacity and the running times quoted by HPI (any thoughts Jolly Roger??) ... beginning to ramble even more than usual now so I must stop Harvey. Edited June 13, 2014 by HarveyC Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 13, 2014 Author Share Posted June 13, 2014 Oh I should have added that if you were to short out the high tension side (i.e. earth the spark plug) I think you would be likley to damage the cdi unit. Harvey Quote Link to comment Share on other sites More sharing options...
Ian w Posted June 13, 2014 Share Posted June 13, 2014 This is what I am going to try with mine have bench tested it and it works well http://www.ebay.co.uk/itm/New-Rcexl-Opto-Gas-Engine-Kill-Switch-V2-0-for-DLE-Gas-Engine-/301099416213?pt=UK_ToysGames_RadioControlled_JN&hash=item461aec7a9 Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 13, 2014 Author Share Posted June 13, 2014 OK, if anyone is interested, I've done the calculation now. In the manual HPI state that a fully charged battery will last for about three tanks of fuel. At 20 minutes run time per tank that's an hour. It's a 1200mah battery, so max drain of the cdi will be 1.2A. But its probably a bit less than that as HPI will have built in a safety margin. H Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 13, 2014 Author Share Posted June 13, 2014 VERY Interesting Ian! H Quote Link to comment Share on other sites More sharing options...
Bowerz Posted June 13, 2014 Share Posted June 13, 2014 Harvey, Your solution of an electronic switch on the 3rd channel in series with the stock one could work if you lost radio contact by putting an inline standalone failsafe on/before the switch's servo wire. One of these http://www.ebay.co.uk/itm/like/140985423326?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=108&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=108&ff19=0 You just set it to failsafe to the 'kill position' on the 3rd channel. Also depending on what switch you use, you can set them to either open or close when power is lost. This would give a pretty redundant killswitch/failsafe solution! Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 13, 2014 Author Share Posted June 13, 2014 Ian, Just discovered that these are available from Just Engines (www.justengines.co.uk) a company that specialises in model aircraft engines, I have purchased items from them several times before and they give excellent service. So I've ordered one from them and hopefully will get it in the next few days. H Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 13, 2014 Author Share Posted June 13, 2014 Bowerz, I've got one of those fastrax fail safes somewhere. I think that the device that Ian suggested, and that I have just ordered will not cut the ignition if you lost radio signal (can you confirm this Ian?), but if you were to use use it in conjunction with the fastrax device and I think it would! H Quote Link to comment Share on other sites More sharing options...
Bowerz Posted June 13, 2014 Share Posted June 13, 2014 H, It did say in the description for the Opto it would if signal failure is lost so seems like a good solution! Liam Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 13, 2014 Author Share Posted June 13, 2014 (edited) Liam, I does not say that on the Just Engines site (from the pictures it's the same product), but let's wait and see. The nice thing is that it is specifically designed for this application. On another point, I have just started to look over my Octane, and I'm concerned to find that on extreme right lock, the arm of the steering servo rubs on the bottom of the tank sufficiently to lift it (there is a little rectangular bulge in the bottom of the tank which it catches on). Its easily fixed as you can lift the tank by 4 mm before the mounting lugs impinge of the holding clips. You could fit washers under the lugs to give you the required spacing, but then all of the weight of the tank would be held by the lugs, so rather than do this I'm going to make/find something to fit over the top of the chassis rails to do the job. H Edited June 13, 2014 by HarveyC Quote Link to comment Share on other sites More sharing options...
Ian w Posted June 13, 2014 Share Posted June 13, 2014 Ian, Just discovered that these are available from Just Engines (www.justengines.co.uk) a company that specialises in model aircraft engines, I have purchased items from them several times before and they give excellent service. So I've ordered one from them and hopefully will get it in the next few days. H Cheaper on ebay Quote Link to comment Share on other sites More sharing options...
HarveyC Posted June 13, 2014 Author Share Posted June 13, 2014 Ian, Have you checked to see if it DOES trip if the tx signal fails?? Quote Link to comment Share on other sites More sharing options...
rctruckz Posted June 13, 2014 Share Posted June 13, 2014 Rctruckz, If you would have done your research, you would have seen the video in question, they admitted to just dojng what they usually would do with a 2 stroke and not listening to hpi. They are all now running OK. I agree it hasn't been the best release but your comments are a little over the top IMO. And 2 strokes DO need running in, and can also be a PITA to tune. I agree it hasn't been as smooth as it should, but with the new information that should have been there on the day of release people are having a lot more success. i dont think my comments are OTT, 750+ notes for a product that is not finished. For that price it should have been well & truly tested... instead until they sort out the problems those that have bought it then its 50/50 weather your goinh to be one of HPI's guinnea pigs (or beta tester in the IT world!) Theres alot of people who have had this problem when running it in (again normal 2 strokes dont really need running in). 1 Quote Link to comment Share on other sites More sharing options...
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