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Scorpion Power Scorpion Power
10-19-2004 03:30 AM  13 years agoPost 1
Kirt

rrApprentice

Lexington KY

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I am getting ready to install the collective pitch mod from Choppa Heads. (Got one at the IHobby show) The flybar that is in the works looks like it will be sweet. Can't wait to get that.

If anyone has any tips let me know. I have seen what is one his web site.

I will let you know how it all goes. I am looking forward to flying it this way. It is a 120 with a Multiplex Brushless running on 7 3300's.

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10-19-2004 05:37 AM  13 years agoPost 2
askman

rrApprentice

willamette valley,​Oregon

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good luck and let us know how it works out. I've seen some hit or miss with it so far. i hope that it gets worked out soon.

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10-19-2004 12:24 PM  13 years agoPost 3
satnaam

rrApprentice

GTA Ontario CA

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My eyes are on your machine

Please give us much feed back as possiable. I am also interested, but have'nt seen much feed back. So far I have been buying Ballistic Technology upgrades.

satnaam

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10-29-2004 04:57 PM  13 years agoPost 4
Kirt

rrApprentice

Lexington KY

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Right now I have most of it installed and don't have a lot of good to say about it YET. I am waiting for them to reply to my email about the kits "issues" and direction snafus. I don't want to make a worng judgement.

I have it together and I should have it ready to fly by the end of the weekend. I am going to post some pictures of what I had to do to make it work and how I set it up. If it flys like it looks it will be solid.

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10-30-2004 02:21 AM  13 years agoPost 5
xagent

rrApprentice

Centreville, VA /​MHA member

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What kind of issues are you haviing. My upgrade kit should be arriving shorlyt. What should I watch out for?

Xagent

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10-30-2004 04:35 AM  13 years agoPost 6
askman

rrApprentice

willamette valley,​Oregon

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the fact that I have not seen a video of it flying on their website is fairly poor. I've seen now 3 kits not flying right and only one conversion in europe flying. I don't know if it is installation problem or design problem. hmm. I hope you guys get it working well.

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10-31-2004 01:01 AM  13 years agoPost 7
Kirt

rrApprentice

Lexington KY

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Here is the latest update of where I am at.
This below is a similiiar version of what I sent to Choopaheads via email and I have not gotten a reply

A couple weekends ago I started to install the Collective Pitch mod to the shops Corona 120.

I have a couple questions and hopefully you can provide some insight to my dilemmas.

1)I inventoried the kit and it says that it come with a HS81 servo. Both of the kits that are in the shop did not have the servo in the packages? It also stated in the first version that it comes with a hardened main shaft. But Version 1.1 instructions do not include this? but the web version does. Bottom line should I have gotten a shaft?

2)The version of the directions on the web and the one that came with the kit on CD do not include any pictures of the new aluminum swash plate lower assembly? Is this why none of the links were the proper length. I, at least did not find that these lengths no where close to being the correct length. I have not flown this yet but I am pretty confident that it will fly with the way that I have it set up.

3)You included a lot of hardware but no enough washers and screws in the 2-56 size ?

4)What are the big 6-40? Screws for. I have two but I have not found a place for them at this time.

5)Can you package this stuff individually? Some one goes thru the process of counting it all and if it was separate it would be easy to incorporate into your instruction.

6)Please make and include some kind of adapter plate or carbon fiber bracket to mount gyros that can not install vertically. (Ie JR500T’s and all of the Futaba’s). I think this would be great addition and should not add much to the manufacturing cost.

7)I also (if Lite Machines will let you) would include a detail drawing of how the swash plate goes together with a bearing count. I did not build this the first time and I am sure that there are many Corona owners that have not built one also. I scratched my head for quite some time before I put it all together.

8)Why are there two extra holes in the lower swash plate aluminum part? Is this to make it 120 degree CPPM? If so there are no links included to do this. and the servo/servo horn angle will be terrible

I am looking forward to flying this and I have high expectations and I am sure many do because of the price of the kit. As a hobby shop owner I know that people expect to get what they paid for. So far this looks like a very thought out modification

I will keep you posted on the results and this was in no way intended as a “bash your product” email.

Thanks
Kirt

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10-31-2004 01:05 AM  13 years agoPost 8
Kirt

rrApprentice

Lexington KY

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Last night I was investigating things and was thinking that the main shaft should be longer, I have turned rotors on this by holding it and spinning it up and it seems like it will be great.

HOWEVER

As of today 10/30/04 I have not gotten a response and I got to looking at the other kit that I have on the shop wall and there was a main shaft in this kit and it is longer....perfect. but there was no servo.

My business partner was looking at the crutch and was told at the IHobby expo (from choppaheads) that the first version that came out the crutch was to thin.
I checked mine (the one that is together) and guess what....
I Have the thin crutch!!!!!!!!!!!
Check the thinkness of your before you start anything, If it is .063 it is a thin one.. I have a blue one at the shop and and it is .082ish.

I am not sure what I should do at this point. I have all of the other items assembled but I have shortned that links because I didn't have a longer hardned shaft.....

I definalty need the shaft and the crutch that I should have gotten in the first plave and will probally buy new links since I was a little chop happy.and they probally would have worked. I will find this out once I put the longer shaft in. They still might work out because I had to reduce travels via the radio.

I will let you know and I hope to post good things. I like these little things and I think that they are good machines and with collective pitch will help get them to the next level.

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10-31-2004 01:22 AM  13 years agoPost 9
askman

rrApprentice

willamette valley,​Oregon

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I think best thing to do, is call larry at choppa. he is a decent person, and will try to set you right I hope.

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10-31-2004 11:45 AM  13 years agoPost 10
Kirt

rrApprentice

Lexington KY

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Yes I am going to call him on this week. I don't think there will be any problems.

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11-01-2004 11:18 PM  13 years agoPost 11
Kirt

rrApprentice

Lexington KY

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Here is the rely I got and I was calling him when he sent this. I talked to Larry for quite some time and he is getting me the parts that I need and I should have this thing flying soon...

Kirt,

I am sorry I didn't get to reply to your email. Our computers we're down the
last two weeks. To answer your questions on the parts.

1) The HS-81 servo was origionally documented in the kit, but had to be
removed due to the price of the servo and all of the CNC aluminum
components. It was supposed to have been changed. I'll edit this later
today. The kit itself has been dropped by over $50 in order to keep it under $200. Some of the bags we had at the show we're missing the MR Shaft I will get one out to you this afternoon.

2)The swashplate was added to the kit the day before we left to the show, we did not have the documentation for it because it is already included in the manual. However I will document it and include it in updated versions of our manual. Keep an eye out on it this weekend.

3)The bolts, nuts, and washers are all bagged outside of our company by Lite Machines. I'm not sure what you mean about the 6-40 screws but I believe that they are for mounting the motor to the motor mount. Packaging individually is not an easy option right now but something we haveconsidered.

4) We have an adapter for the larger digital servos, this is a very new mod and will be available on the net before the end of the week.
The two extra holes in the swashplate inner race are for later mods.
When setting up the links you need to make sure that the swashplate,
subrotor mixing arms, feathering plate and subrotor are all level. This will get you 4 degree pitch due to the blade pitch that's already in the stock Corona blades Adjust your links according to this set-up. Because you are using the stock blades you aren't going to get a full 10 degrees positive and negative. What I recommend doing is setting up the rotorhead so that all of the the links are flat (as stated above.) Get the heli into a hover and this will tell you whether everything is set-up right. From here you can adjust the links just like you would on the stock fixed pitch version. After you get the heli into a good controllable hover start adjusting your pitch curves by 10% you will be able to set the highest and lowest pitches based on your flight characteristics.
The crutch you received should have been 2mm we upgraded from .062. We are looking at 3mm but it may be too heavy to use for this mod.

Please keep in mind that this mod is NOT a 3D version for the CP head. However we are working on several new complimentary parts for this mod to include a subrotor/flybar mod (available next month), symmetrical rotorblades, and an aluminum MR Hub.

Thanks,Larry Fultz

Super easy to deal with and talk to if you need help or have questions. don't hesitatate to call him.

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11-02-2004 01:36 AM  13 years agoPost 12
satnaam

rrApprentice

GTA Ontario CA

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Kirt, thanks for the update

Please keep us informed. I might give Larry a call my self tommorow.

satnaam

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11-03-2004 08:59 PM  13 years agoPost 13
Whirly-Bird

rrNovice

O.C.

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Kirt,

What does Larry mean that the CP is not a 3D version? Is the Corona supposed to be able to fly upside down with this mod or is this just something that will allow the Corona to autorotate?

How is your progress now?

Thanks.

Ron

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11-04-2004 04:01 AM  13 years agoPost 14
rodneybarrett

rrNovice

Brentwood, TN USA

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I also have the CP upgrade. Put the kit together and had issues with the swash and ball being way too tight. Tried to fix it but no luck. then I started reading on the rcgroups.com site about all the issues with this upgrade. I basically stopped the upgrade.

I am also somewhat disgusted by the lack of quality and finish the kit has. for $200 (the price of a stock corona) it should be dead on.

I have yet to contact choppahedz about it because quite honestly don't know where to start.

any sugggestions?

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11-04-2004 04:50 AM  13 years agoPost 15
Kirt

rrApprentice

Lexington KY

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With out a flybar and symetrical blades or at least regular stock style CP blades it is not going to be a 3D Machine. It should fly a lot better than a stock corona and I think it will have much better flight characteristics in forward flight. (not want to just climb)

I have not had time to press on with the mod and I am waiting for the new thicker crutch that I was suppose to get.

Rodney I would just call him. He is easy to get along with and will help you out with what you need,

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11-08-2004 05:34 PM  13 years agoPost 16
xagent

rrApprentice

Centreville, VA /​MHA member

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Same Issues

I've had the exact same issues with the kit.

1. No Servo as is listed in the documentation and online.

>>Larry says it was removed from the kit due to keep cost under control.

2. My kit ordered direct from Choppahedz was missing the MR shaft. You cannot do without this part since it needs to be longer then the original.

>> I had to contact Choppahedz twice to get them to send me one. I finally received it last week. The were nice enough to send a set of carbon fins and a t-shirt for the inconvenience.

3. Swash Plate Binding. The ball in the swash plate is so tight that the plastic control horns on the lower portion of the plate flex into the rotation of the upper portion. I'm reluctant to crank up the bird since obviously if the lower and upper collide their is going to be some resultant damage.

>> Have not contracted Choppahedz about this yet.

Overall Impression - Larry at Choppahedz seem like a nice guy to deal with, but the overall Quality in keeping up with the documentation, getting the right stuff shipped, and quality of the parts has allot to be desired.

In summary, I would NOT buy this upgrade kit again.


Xagent

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11-08-2004 05:49 PM  13 years agoPost 17
Whirly-Bird

rrNovice

O.C.

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Thanks for the update Xagent.

I'm still waiting to see if anyone figures this puzzle out. I haven't heard anyone anywhere ever use this cp successfully.

I'm still asking the question: "Does this thing work?"

I'm leaning to believe that maybe this piece of equipment was put on the market a little too soon.......

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11-08-2004 07:00 PM  13 years agoPost 18
xagent

rrApprentice

Centreville, VA /​MHA member

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Yea, its a real bummer. I had high hopes for this thing.

Xagent

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11-08-2004 10:40 PM  13 years agoPost 19
bret4

rrNovice

Brookfield, CT

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Can't a eco 8 head be put on a corona? Never saw one up close. I have been looking at the eco lite. It comes with 30 inch dia. rotor and I would think it would be close to the weight of the corona, a bit lighter I'm sure. For $89.00 US could the Eco lite be a good donor of parts for a cp upgrade on the Corona?

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11-08-2004 10:57 PM  13 years agoPost 20
satnaam

rrApprentice

GTA Ontario CA

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Man I can't believe this

What does Litemachines have to say about this. For two hundered dollers for a kit that has problems. I have yet to find someone who this installed and flying. Thank God I did not buy it yet. I hope Larry gets this thing to work and soon.

satnaam

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