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Showing posts from April, 2016

Run on the truck

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https://youtu.be/-rwF9hlZiJc I have changed front suspension arm to Xray. After that my dnx8 lost balance  I try some setting two days. I recover to the video. But not yet. Rear truncation is lost. I don't understand that. I researched rear blase holder. The holder was broken. I want to replace aluminum holder.

KO servo

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I've got new KO servo. I use Airtorinics trancemitter. It has response mode selecting. Another brand servo have to select normal mode or super response mode. After that we have to bind once more. But my receiver was broken on bind switch. I bought new receiver. It can be binded well. KO servo cable is better than Airtorinics . I wrapped water pump seal for protecting cable. All servo has been changed. I'll try this next weekend. If I feel slow response on handling. I return Airtorinics servo. I think most important things of servo is holding power. But the holding power need clearance and recovery speed. On gap buggy receive power on front tires. Buggy needs counter stealing little. But driver can't feel the little. Servo and front suspension clearances help that.

Picco arrived

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Model manual almost same as Toriton. Bore stroke is same. But hp and rpm are different. Triton has more torque and rpm. I doubt triton spec. There's not as such tuning method. At least five port Picco has more torque. Picco has ten fins. Picco has more one fin than triton. Clank case has squared fins. It has more strength. It likes as Reds. And front bearing housing like as triton. This is triton clank case. It has round type fin. Crankshaft is almost same as Triton. It has two counter weight. This photo is triton. Picco improved cooling head and clank case. Cooling head near chamber work well in summer. We can lean more.

Picco 5TB 2016

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I like Picco engine. Reason why do I like? Picco piston touch sleeve at under the piston top. It avoid thermal expansion. I order new Picco engine 5TB 2016. It likes Triton. I've already had 7port Triton. In high gripe truck I want more power. Then I buy 5port. Picco OEM brand Reds improved carburetor reducer. It's higher than other. It has long neck. And it has offset intake hole. It aim like as duo reducer. It provide fast air flow on low throttle.

Servo

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I've used Airtoronics servo. I'll change new servo.   I reserch two servo.   First KO servo.   KO has coreless moter and blashless moter servo. Almost people think blashless is better . But no it isn't. Coreless is better at Power,Control,Speed yet.   Coreless  7.4V 31.6kg 0.11s/60° Blashless 7.4V 26.0kg 0.12s/60° It's completely made in Japan. KO servo is the best quality.   Second Airtoronics. Atronics unviel new servo SRG-BX. it implove trque 0.8kg. 7.4V 19.8kg 0.09s/60° There is not aluminum top case yet. Probably aluminum top type will release soon. Competition buggy needs aluminum top case. Engine control servo need trque for braking. It needs 25kg Sterring servo needs 20Kg. Airtoronics is on the border of trque and speed. For sterring use Airtornics. For Engine control use KO RS x 2.

Connector holder

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I paste connector holder at buttery cover. I cut the cover for through the line. It's Kyosho parts. I use to paste with shoe goo not CA. I change all drive shaft univ type. Center is MP9 and wheel drive MBX7R. There are just fit.

Throttle linkages

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Engine control adapter has threading hole for servo horn thread. Then it can't move smoothly. I through 2mm drill on the hole. I sand adapter between lock nut and lock  nut. First nut make thread vertical solidly.

Earthquake

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It occurs big earthquake in Kumamoto Pref in Japan. I live in Kyushu island same as Kumamoto. Seismic intensity 7!   Our family are safe. But 40 Kumamoto people died. I want to go help them. Many friend live in Kumamoto. But Road is broken if many car went to Kumamoto. It occurs traffic jam. Relief goods cant be send to Kumamoto. US navy helicopter carry relief goods. Thanks USA! And Thanks to kindness all over the world.

Designer

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I respect two buggy designer. First Gill Losi jr. He design associated RC12L. L means Losi. Ball connect rear suspension idea is made by him. And Losi 8. Nowadays all buggies copy from the buggy. Center mount engine,light weight,big bore shock, roll center adjustment. Second Gerd Strenge. He is Durango farmer. He has joined Serpent now. Before Durango he worked for Serpent. DNX408 has no result. But it has original design. It cause only no experience for GP. Need simplicity and durability. Serpent already has a designer Billy Easton in USA. SRX8 is develop by Billy. But previous Cobra811 prototype was designed by Gerd. Serpent buggy has most near DNA from his design. And gear mesh adjustment, bulkhead  came from DNX8. Probably two designer never develop GP buggy. I want to see his design car more. Under the good implementation organizer.

Shanghai

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I've been in Shanghai China this week. I use Japan Air Line too many time in a year. Every year mileage status is top diamond. But this year status card is different. It's made from titanium from jet engine turbin not plastic. The class is secret priority class called metal class. I never wait cancel. I can ride I want to ride. I never sit down business class. Only first class. Shanghai weather is fog. Almost white out. Air environment is so bad. Today I go to Chinese restrant. Crayfish dish is in a season in China. F1 Grand Prix held at Shanghai this weekend. If I had free time I'll go to see.

FRONT SUSPENTION

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I broke front suspension arm twice. Left side is xb8 suspension arm. I measure both. It's almost same size and position.  Sway bar guide position is little different. I replace to Xray. Front under kingpin ball return original. For Increase Under spring weight. It make front end grip strong. And on the gap car becomes stable. It's perfect fit. On my experience Xray arm never break. It's rear hub holder. I replace rear driveshaft to Mugen. Xray hub holder has two way bearing guide. It receive same size bearing for univ drive shaft. I can use MBX7R rear drive shaft. I want more durability and precision. I never give up!

Retire

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16 guise join the yesterday race. On qualify my best lap is 36s. Expert best 33s. On my trqunique the lap is not bad. Truck surface is very High grip condition if I select diff oil ticker. I'll scrape 1s.But handling is good. On main final my new front suspension lower arm was broken again. It's not cause any clash. At the shock pin hole shock pin cut the arm downward. Does plastic material have any problem?

Maintenance 2

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I've maintenanced DNX8 all day long. Build Control tire. New front section. Crutch bearing replace. Reds cuatro crutch make bearing long life.And feeling is so good. Carburetor change to Picco. Front diff oil and bearing replace. Front center drive shaft replace MP9 Front center drive shaft. DNX8 shaft has already big clearance on joint. And Kyosho is lighter 2g. Rear hub career bearing is no problem. Put on new body! Race ready  My DNX8 has weight under 3500g. Without fuel.with tire and buttery.

Maintenance for race.

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Tomorrow I'll go to race. Then I'm maintaing DNX8. I broke front suspension arm. The crack is from the shock end pin  to pin stop screw. Then I scrape suspension arm only upper side on this picture.And scrape shock end ball. Mugen MBX7R front drive shaft longer 1mm than rear drive shaft. It can adjust only bush. On the univ side shape of connection is different. It is for not to touch for suspension arm end.