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CLASSIFIEDS - Vendors > RAPTOR 90 Raptor 90 Kasama head install/setup thread (Updated Pictures)
 
 
red_z06
Elite Veteran
Location: Dumont, NJ

My (and S Bell's) concern is with the 3mm Jesus bolt at top. Two 3mm clamp screws will hold it down but every time you replace the shaft, the link dimensions can change. I guess you will either have to use a 4mm od bushing to take up the slack.

www.justinchi.com
05-20-2008 03:22 AM
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jsenicka
Key Veteran
Location: Hampton VA

Just completed my second Kasama Srimok build for Raptor 90 #2 in my squadron. This one was a from the full production run of the head versus a final prototype. The kit now comes with the necessary link rods. Very nice!!!



Jim Senicka
TREX 700 Nitro Pro/OS91
3x R50V2/OS50/Kasama - 3x R90/OS91/Kasama
05-23-2008 12:33 AM
 
 
red_z06
Elite Veteran
Location: Dumont, NJ

Are you drill and tapping the Jesus bolt hole to 4mm? I'm thinking of doing that. How are you maintaining -2deg angle on the flybar arm? It would make a lot of sense to have a factory jig that held the arms in right angle and lock the flybar at the same time for a setup.

www.justinchi.com
05-23-2008 01:23 AM
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jsenicka
Key Veteran
Location: Hampton VA

I have not done anything with the Jesus Bolt. I will talk to Kasama on this through Grand RC and check their recommendations.

Aligning the flybar arms is really quite simple. If you have a hex driver in both grub screws directly parallel to each other, the flybar arms are dead on aligned.



Jim Senicka
TREX 700 Nitro Pro/OS91
3x R50V2/OS50/Kasama - 3x R90/OS91/Kasama
05-23-2008 11:45 AM
 
 
red_z06
Elite Veteran
Location: Dumont, NJ

How did you find out that the set screws for the arm was offset by 4deg? I don't recall seeing it in the documentation. Did Ed tell you?

www.justinchi.com
05-23-2008 12:42 PM
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TMoore
rrProfessor
Location: Cookeville, TN

Quote 
How did you find out that the set screws for the arm was offset by 4deg? I don't recall seeing it in the documentation. Did Ed tell you?

If there is a flat machined on the flybar and you tighten down on it, it's clear that the ball isn't in line with the centerline of the arm. The EVO 90 head does the same thing. It's not a 2 degree drop, the drop off centerline is 2mm.

TM

Buying tools is half of the equation, knowing how to use them is the other. - T Moore
05-23-2008 02:16 PM
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red_z06
Elite Veteran
Location: Dumont, NJ

It uses stock raptor90 flybar which almost lines up with the red flybar retainer but not for the flybar arms.


I just checked the flybar arm set screw position. It is set inline with the arm itself. So, it can't be used to set 2deg per arm down angle prescribed.

Things that need to be lined up.

1. flybar ams have to be set down 2deg from horizontal.
2. paddle centerline have to line up with now imaginary flybar horizontal line.

Best I can do now is to just eyeball it. It really would be nice to have a flybar lock that doubles as a arm alignment and paddle alignment sight reference.

www.justinchi.com
05-23-2008 02:22 PM
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jsenicka
Key Veteran
Location: Hampton VA

I disagree. The flybar arm lock screws are offset. See the photo a couple posts up.

I realize the instructions do not show the droop. Based on watching the Finless setup video on the TREX 600 and seeing that the R90 arms are identical, it just made sense

Jim Senicka
TREX 700 Nitro Pro/OS91
3x R50V2/OS50/Kasama - 3x R90/OS91/Kasama
05-23-2008 04:18 PM
 
 
red_z06
Elite Veteran
Location: Dumont, NJ

I just double checked with a key in it and you are correct that it does have the offset.

However, I've tested with few new hex keys and they all flex (as they should) about 10deg total tilt due to tolerance between the key and the set screw slot. Unless you can find a way to secure the hex wrench in line with the set screw axis, it can't be used as a alignment method.

Kasama producing flybar with the flats ground at correct angle will make that job easy.

www.justinchi.com
05-23-2008 04:29 PM
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jsenicka
Key Veteran
Location: Hampton VA

Thorpe drivers are your friend.
That aside, even if you are off a degree or so, it does not matter. As long as your flybar arm to washout links are the same length, it will self center. It will simply move where the "washout arms parallel" point is a bit on the overall collective arm movement

Jim Senicka
TREX 700 Nitro Pro/OS91
3x R50V2/OS50/Kasama - 3x R90/OS91/Kasama
05-23-2008 04:47 PM
 
 
red_z06
Elite Veteran
Location: Dumont, NJ

I know it flies. We fly it on Trex600. All I'm saying that there should be a better way to align much like the flybar cage.

www.justinchi.com
05-23-2008 04:49 PM
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jsenicka
Key Veteran
Location: Hampton VA

Flew my R90SE yesterday with Kasama Srimok number 2. Man I love this setup. The second one went together in a couple hours from start to finish. Running +/- 13 degrees on collective and just over +/- 8 on cyclic. I test flew it in winds gusting from about 10 to 25 mph, and it was still a ball.

Jim Senicka
TREX 700 Nitro Pro/OS91
3x R50V2/OS50/Kasama - 3x R90/OS91/Kasama
05-27-2008 12:57 PM
 
 
red_z06
Elite Veteran
Location: Dumont, NJ

I just fired up our R90SE from the dead. It has been in the storage after unsolvable PCM lockout. With specktrum it seems to be stable enough (for now).

With Kasama head (4.8oz lighter), no bottom plate, QuickUK mount, fan, boom support clamp, it comes to 11lb 1oz.

I plan on getting rid of the side frame stiffeners and the header tank for additional 6-8oz? of wet weight.

www.justinchi.com
05-29-2008 08:07 PM
HOMEPAGE  
 
 
jsenicka
Key Veteran
Location: Hampton VA

You should try it with an RL30 RevLock. I have mine configured for just about +/- 13.5 pitch, and the RL30 set to back it off to about +/- 10.5 when it loads up too hard. Suddenly I have the collective management of a pro!

I am planing to post a full setup and configuration thread on the RL30 next week.


I need to weigh mine as well. I went from a 4 cell Sub-C to an Align 2-in-1 and a light 2s Lipo pack. I saved about 4+ oz in battery, plus 5 oz on the head.

Jim Senicka
TREX 700 Nitro Pro/OS91
3x R50V2/OS50/Kasama - 3x R90/OS91/Kasama
05-30-2008 04:51 AM
 
 
Laurens
Key Veteran
Location: Oegstgeest, NL

I never used the bottom plate or side frame stiffeners. I just put back my headertank though, the extra flight time is fun to have

TeamFlightpower, Team Flighttech, BW Stratus, Trex 500
05-30-2008 10:46 AM
 
 
red_z06
Elite Veteran
Location: Dumont, NJ

I was testing to see if the muffler pressure can be removed. I was hoping the pump and regulator or Os 91 SZPH will work. This is in prep to put fuel maget and so I don't have to immediatly purge the exhaust gas from the tank. The result is thumbs down. Too much drop in rpm in inverted.

I made a big loop with a vent line so it will not leak fuel.

www.justinchi.com
05-30-2008 12:47 PM
HOMEPAGE  
 
 
Timbers
Senior Heliman
Location: Wisconsin

Jesus Bolt

I just got the new Kasama head for my Raptor 90 in the mail and I put it together today. I noticed the jesus bolt is 3mm. The Raptor main shaft has a 4mm hole for a 4mm jesus bolt.

Why did Kasama put a 3mm jesus bolt in here? Did they screw up?

Running that head with a 3mm jesus bolt is not very safe in my opinion. First of all it proves pretty much useless because its not gripping the main shaft much at all. Those pinch bolts on the side are just for added sturdyness, they aren't there to hold the head to the main shaft. Third it allows for slop in the head, to where you wouldn't get the same mounting position on the main shaft each time you took the head off.

I drilled and tapped out the head for a 4mm bolt today. I did a really nice job, and it should be much safer to fly knowing that is 4mm, I just can't believe I have to modify a $275 head, Kasama needs to fix this ASAP.

...Tim

You fly RC helicopters? Can I have a ride?
06-08-2008 06:17 AM
HOMEPAGE  
 
 
jsenicka
Key Veteran
Location: Hampton VA

Already addressed with Kasama engineering. I think we should see this addressed shortly.

I have about 20 hard flights on each of my R90's with Kasama so far and zero issues.

Jim Senicka
TREX 700 Nitro Pro/OS91
3x R50V2/OS50/Kasama - 3x R90/OS91/Kasama
06-08-2008 01:09 PM
 
 
jsenicka
Key Veteran
Location: Hampton VA

As I posted on the other Kasama thread. This is sort of subjective. Synergy and Raptor 90 run a 12mm main and a 4mm bolt. Stratus, and others run a 10mm main shaft on a 90, and most of the time a 3mm bolt. I looked at the Stratus, Vibe and others and could not believe you could run a 10mm main, but I have yet to see an issue. I believe Kasama did quite a bit of testing with this head on the Synergy (where this head started) and the Raptor and did not see an issue with the 3mm bolt placed under shear load only. Since you have the 2 pinch bolts protecting against twist and flex, the jesus bolt is carrying only weight. With the stock Raptor head and some of the after market, the single 4mm bolts is subjected to all shear, twist, flex and all other off axis loads. With the kasama, you distribute all of the flex loads across 3 3mm bolts and a substantial housing.

Jim Senicka
TREX 700 Nitro Pro/OS91
3x R50V2/OS50/Kasama - 3x R90/OS91/Kasama
06-08-2008 01:29 PM
 
 
Billebob
Senior Heliman
Location: Tim-buck-2

Jim Senicka,

Shoving a 3mm structural bolt in a 4mm hole just don't cut it no matter how you try to justify or quantify it. Glad they are fixing the oversight. This product upgrade certainly looks good for Kasama in the form of prompt and professional action, however omitting this important fact from you promotional review in this post may not do the same for you.

BB
06-08-2008 02:56 PM
 
 
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CLASSIFIEDS - Vendors > RAPTOR 90 Raptor 90 Kasama head install/setup thread (Updated Pictures)
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