posted
the drag is caused by the "WEAK" spring that presses the post into the channel that grabs the "rotostart" flywheel.... it is constantly grabbing tha channel, and tries to grab every time the motor turns... and it simply fails due to the fact that the flywheel has a beveled slot... but every time it hits that angled surface, it tries to grab... and causes powerloss...
posted
Personally I'm not really a fan of pull starts. Sure they're good when they're new, but issues with broken cords and slipping oneway bearings made me throw away them all and convert to bump start. Although that would defeat the purpose of coz this engine will find its way into many vehicles not able to be started with a starter box. I've never used a rotostart but think that it would be easier in the long than puttin up with dramas with pull starts.
DFF, MonsterMaxx was simply comparing having the oneway bearing on the inside of the engine or on the outside, not comparing it the HPI design you were talkin about. Having the oneway on the outside means that the shaft going through the back plate is connected to the crank and spinning all the time(OS use this design). The hyper pull start has the oneway bearing internally similar to the RB picture you posted, however it has a pin in the end of the bigend connecting it to the p/s flywheel instead of the slot like the pic of the RB.
-------------------- Hong Nor X1CR FTE Powered by 421B, Ofna Pipe Sacker Pro Powered by RB S5, 063 Pipe RB V12 waiting in wings for new ride Posts: 41 | From: Australia | Registered: Apr 2003
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posted
I like the force pullstart-not talking about the oneway area ,just the handle and string etc, very reliable for me. I was wondering if I should get an ths pipe for my savage,I 'm gonna get the rb 28 when aval , but was wondering if there would be a bigger pipe to go along with it? I mean they say you can run a pipe for a 21 on the 26 now but, I know that no matter which pipe you run for a 21 on a 26 it's holding back the eng. I mean in 2 stroke motor cycles you run a big bore kit you gotta run the pipe for it otherwise you not seeing the true power and since the 26 are larger by whatever % dont you think that a 26/28 should have a pipe sized for the eng?
[ 26. February 2004, 03:19: Message edited by: tlyee63 ]
Posts: 5 | From: San Diego | Registered: Apr 2004
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posted
I am finalizing the spare-parts listing and will be going to Italy to check out the last production possibilities, so after next week I hope to be able to realese the part# so you can place your orders.
We have made some further tests and the results are very encouraging. Torque is great, rpm more then sufficient(at least for me ). We have made our tests on a Savage, first with their original pipe for which the performances of the engine were already much better then their .25 and after we have tried with a 1350-63P pipe(with the original header), which already increased the performances with at least 20%.
I think a wheelie-bar is needed on the Savage when you will install our engine , way too much power and we have only used fuel with 16% nitro.
Anwyay, if you want me to finsih this fast try not to overflow this forum with questions for me...
I can't understand though why so many people are anti-rotostart ? from a marketing point of view surely it makes sense or hpi/hotbodies wouldnt be turning out kits for every engine they can surely ? And to all those people who complain its an extra thing to lug about, its a damn site easier than lugging a starter box & 12v gel cel !! or having ur truck lug the elecy start sytem with it...... as monstermaxx & others have pointed out, this engine WILL end up with a rotostart one way or another (the sirio .27 has been modded for it now BTW) & both p/s & roto have their problems if you dont pre-heat the engine, take care not to flood, etc, etc, but it would be nice to have an official rotostart AND pullstart option in my opinion....
posted
first off.. alot of people with roto start break 1 way bearings cause they are too "newbieish" to know what flooded is like.. i love pull starts.. hate the fact my menace forced me to get a batt operated drill to run it, soon or a later ill takeit apart to make it pull start.. tuning driver, glow ignitor, gal of fuel, temp gun all i need to run.. hate to have to carry 1 more thing that does not fit in a pocket.. truck in 1 hand, remote/fuel in other, rest in pocket.. where i can make drill fit.. no where.. so i love pull start..
Rody, I think it will be time to get a new forum going:
"R&B Concept OVER .21 engines" LoL
Keep the good job coming !
DFF
[ 29. February 2004, 16:56: Message edited by: DFF ]
Posts: 28 | From: Toulouse, France | Registered: Nov 2002
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Badger
unregistered
posted
I think I am in love with you Rody! ha ha ha
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scorchingsavage
unregistered
posted
Thank you rody for taking the time to properly test out this engine and also answering our posts! It means alot to take the time to test an engine even though everyone is screaming for it now! I am really excited about your new engine! thanks!
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posted
Can't wait to see the new .28 but also a positive side effect might signal the start of an easier way to convert existing RB 21's, C5 , WS7 2 etc. to a factory pull start which doesn't require the crank drilling and machining of parts.
Are there any plans to do a selection of 28's in the way that we can choose from a variety of 21's,I can't begain to imagine the performance of a Rody .28 C5 Posts: 11 | From: Sheffield, England | Registered: Sep 2003
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posted
For the final engine configuration you will have to wait a little more.
As for the pipe, untill now we have tested with the 063 pipe which is working quite well with this engine. Of course we will also test a bigger pipe but for this we need a little more time.
posted
There will be a performence gain with a pipe designed for the increase in displacement right?I perfer to get a pipe that will unleash the nasty rb 28 full potential Posts: 5 | From: San Diego | Registered: Apr 2004
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posted
Guys ..... guys ..... come on now. Let Rody finish this one first, before we start talking about Mods and pipes. I think Rody had mention already he can work faster without answering all these questions. He was nice enough to even say he was working on a .28 engine. He could have just waited until it was finish, but being the nice guy that he is, he let us know.
posted
Tomorrow(wednesday), I will be in Italy to finalize the first engine which we want to release and once we have started to produce and sell the first engines, then after that you will have to see what comes next...
Only one thing at the time is the best we can do...
posted
ok,so its's in the future right-the new pipe?. I'm not trying to beat dead horse but I dont want to get a pipe for a 21 to run on the 28 when I can just wait for a true 28 pipe.
Posts: 5 | From: San Diego | Registered: Apr 2004
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posted
that horse is dead... I believe it is safe to say that the new motor will be availible 'soon', and that there is a new pipe in work but not until after the motor comes out... Posts: 1 | From: maryland usa | Registered: Apr 2004
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posted
rcstook ..... very well said. The only question anyone should be asking now is, when will Rody be taking "Pre-Orders" for the new engine. I know I'm ready to order. Posts: 1 | Registered: Apr 2004
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posted
A little sneek peak video would be really kewl. Maybe see an RB28 launching from a stand still against say a sirio 27??
Posts: 8 | From: Vancouver,BC, Canada | Registered: Aug 2003
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posted
(Quote from Rody) RB Products - Rody Administrator Member # 1 posted February 27, 2004 10:08 pm --------------------------------------------------------------------------------
We have made our tests on a Savage, first with their original pipe for which the performances of the engine were already much better then their .25 and after we have tried with a 1350-63P pipe(with the original header), which already increased the performances with at least 20%.
I think a wheelie-bar is needed on the Savage when you will install our engine, way too much power and we have only used fuel with 16% nitro.
Yea, this would be a nice video to see! Posts: 1 | Registered: Apr 2004
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posted
You see, even with the pipe you already own, the performance is huge. The Savage tuned pipe isn't exactly known for its great performance, but still, with an engine like the .28 the output is incredible! In due time someone will make an .25+ tuned pipe and that will push output even further, but until then, let us just enjoy the time we are gonna spend with that powerplant and think about even more power later. By then you wil have to replace your drive train anyhow Posts: 5 | From: U.K | Registered: May 2004
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Corrado
unregistered
posted
Rody, how'd testing in Italy go?
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We are finalizing the first project called "TM728" and are looking into also a rotostart compatible solution, however first things first.
We have just send out our mailing concerning this new engine to our distributors and so you can pre-order your engine soon. If everything goes well we then hope to receive our first shipment in the middle of April.
posted
Nice video Rody, OK, I predict those are going to fly off the shelf. There is quite a buzzz on the internet forums about this beast. Lots of people can't wait to get their hands on it.
Great work RB. Many don't realize just what it takes to get a project like this off the ground and to completion. Fewer know what it is really like dealing with your manufacuter too. Posts: 272 | From: USA | Registered: Apr 2003
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posted
Thanks for the positive comments and while testing/filming we enjoyed very much the overall performances. As for our supplier, indeed things are never easy but what is most important is that we reach our goal...
posted
Thanks for the Video Rody (and the part number) very nice. Looks like more than enough power, I can't wait. I have already called my dealer to place my order. Thanks again for all your hard work. Posts: 1 | Registered: Apr 2004
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posted
Nice to hear a date... gives me something to look forward to... I might need to go ahead and strengthen my driveline... I'm sure it is going to need it... Nice sneak peak video... but a wheelie is a wheelie... I want to see some roaster tails and monster truck action on the track with this beast... hehe Posts: 1 | From: maryland usa | Registered: Apr 2004
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posted
You better order a double or triple quantity Rody. Or you will have no engines left within 2 weeks!! I mean, A LOT of people are waiting for it and they don't wanna wait one day more if the can have it today. Kinda like 12 people haven't eaten in a week and then the pizzaman rings at your door. It's finished in no time!!!
Posts: 5 | From: U.K | Registered: May 2004
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somoney26
unregistered
posted
for savageguy, i dont carry a starter box and my truck does not carry electric starter stuff around... all i carry is the glowstick, and all the truck carries is the pullstart... with motors as reliable as the ws7 and c5rody i run, they start on one pull... just no need for electric stuff to carry around...
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