RE: Scratch Built Ignition???
 

Wow, nice work! I'm the same way, and often rebuild wrecks that most people wouldn't touch. I seem to enjoy those planes more than my other ones because I have little financial investment in them and I'm not quite as worried about crashing them.

Have fun!
AV8TOR

RE: Scratch Built Ignition???
 

Hey I cut out a hub today and turned it down to about 1" od.so that should make a decent shoulder for prop adapter to set against.Thanks your idea worked great.[&:]

RE: Scratch Built Ignition???
 

Cool. Glad I could help!

Take care,
AV8TOR

RE: Scratch Built Ignition???
 

Another tip, since I thought of it.

Some of my weedies came with a magneto nut that had a long shoulder, or pilot, where the cable for the weed eating head plugged in. On a couple of my motors, I cut out the hub like we have talked about, and used it to mount the magnet for the electronic ignition. Then, the crankshaft threads were a little too short to mount a prop on. So I used that long nut. I cut it slightly shorter so that the length of that shoulder was the same as the depth of the prop hole, drilled it the rest of the way through, and tapped it all the way through. Then I reamed the prop out to match the o.d. of the shoulder on the nut, and then installed the prop with the nut on backwards and the shoulder going through the prop. Works great.

Make sense?

AV8TOR

RE: Scratch Built Ignition???
 

av8tor....can you please post a photo of the way you done that ...you know the neat flywheel update!! Thanks Vapt,n

RE: Scratch Built Ignition???
 

Makes very good sense, the TRD engines held thier prop hubs on with an assembly similar to that.

Scott

RE: Scratch Built Ignition???
 

Ha ha... I just knew that post was going to trigger a request for photos! I will try to get some pics posted in the next day or so.

Take care,
AV8TOR

RE: Scratch Built Ignition???
 

Don.t forget to have your assistant holding the flywheel when you take the photo!!!

RE: Scratch Built Ignition???
 

Anyone wants another "blue light special" I will sell you a built and tested circuit and a hall sensor and magnet for $35 plus shipping..It takes 200 ma at any speed and will run on 4.8 or 6 volts..I have used these for 16 years and they are very reliable...They are larger than the C&H circuit....You will need a spark coil ..This is the bare circuit only, no box..
Coils are available from C&H, boxes from Radio Shack....I don't recommend Modelelctric coils because of the high voltage input from the CD circuit.....

If you send me your address and total I'd like to get one of your blue light special....Mike:D

RE: Scratch Built Ignition???
 

Check your PM [8D]

RE: Scratch Built Ignition???
 

Check your PM

Jean

RE: RE: Scratch Built Ignition???
 

Hi guys,

Sorry I haven't gotten those photos on yet. My wife's father had a massive heart attack. He's going to be ok, but it was, and still somewhat is, touch and go at times.

Capn John.... Sorry but it would be difficult to have my "assistant" hold the flywheel for the pics. I still haven't gotten around to buying a digital camera, and when I post pics here, I just scan the actual part with my computer scanner and then post that. I'm afraid my wife wouldn't fit into the scanner!! :)

Take care, and I'll try to get pics on soon,
AV8TOR

RE: RE: Scratch Built Ignition???
 

I sure hope your wife,s Father is going to make it back to real good health again. Is there a big lake near that beach or the ocean? I did have a plane to fly off water. It sure was fun. Take care of the Family....and God Bless Capt,n

RE: RE: Scratch Built Ignition???
 

Would the person who put a TIM6 unit on Ryobi sucessfully please send pic's and maybe info on mag size and mounting bracket for hall effect.I now have lathe so I can turn pieces for a monting ring.I'm almost completed with TIM6 on Q35 using the Hall effect will probably use approx. 3/8" magnet on a very small hub under 1" . thanks.[&:]

RE: ignitions
 

Hello:
I have missed the www adress for the tim - 6 ignition kit. with a friend are planning to use it in a Talon 22 cc engine in conversion process.
Does the kit comes with all the accesories needed?? I mean hall sensor, magnet, circuit, coil and plug boot??

Any inputs will be usefull.
Thanks.

RE: RE: Scratch Built Ignition???
 

Type in your favorite search engine Jerry E Howell you'll find he has very neat stuff at totally reasonable prices.[&:]

RE: Scratch Built Ignition???
 

G/day everyone.
Are any of you blokes flying your converted engines. Are you using ppm or pcm recievers.
Thanks. Herb.

RE: RE: Scratch Built Ignition???
 

From my understanding, PCM is not recommended for use with gas engines because if there is any interference from the ignition system PCM might mask it until it was too late. I use PPM and have not had any problems. However, I am pretty finicky about my installations, shielding, etc.

Take care,
AV8TOR

RE: RE: Scratch Built Ignition???
 

pcm also costs a lot more which goes against the engine converters credo "more 4 less"....:D


dave

RE: RE: Scratch Built Ignition???
 

1972 Proline AM and FM, rubber spark plug boots, no interference.
Zenoah G38,G62, Q65, GT74, Q50, all with my ignition inside the mount...:D
Who needs technical trickery ?

RE: RE: Scratch Built Ignition???
 

G/day everyone.
Thanks for the feed back [ re PPM or PCM]. I guess each to their own, I regards to keeping cost down I cant agree more. I run pcm for my own peice of mind cause it has better filtering, not because of fail safe.
Cheers.

RE: Scratch Built Ignition???
 

This has really been a great series of posts - have learned a lot - I've had a 18cc featherlite I've wanted to put in an 80" wingspan cub, but have hesitated as it's just too heavy - Think I'll order the TIM-6 ignition system w/coil and convert the engine - If that works well, I'll probably convert my 25cc homelite and maybe a 45 cc sthil I just got - although the sthil may deserve the CH ignition kit with the variable timing.

Has anybody figured out the parts list and cost for the CH kit. I am still unsure of what all I'd have to buy from CH to do the conversion. All this electricity stuff is just not my thing - so for those that understand it - please advise.

68. CH Ignition module high voltage board built and tested
build your own ignition. Does not include spark coil ........ $39.95
46. Ignition coil gray spark plug wire screws in ....................... $21.95
47. Ignition coil black spark plug wire is potted in .................... $19.95 ?????? Which Coil????

Can you use the existing spark plug wire leak, or should you purchase
10. Shielded plug lead with Bosch cover, 14mm ..................... $21.95 ???

Thanks

Ramrod25

RE: RE: Scratch Built Ignition???
 

with the cheaper coil you glue the plug lead in and then cuss at yourself for saving $2 when you need to take it apart[:@]

you will also need a hall sensor, magnet and some type of enclosure. if you're not the tinkering type it's probably better to get the ready made ignition.

the bosch boot is nice but it's also a bit chunky, especially on smaller engines. the regular old rubber boot with a braided shield on the lead works just fine.


dave

RE: RE: Scratch Built Ignition???
 

Summarizing, it appears that the CH ignition system needs the ignition module, coil with the option to attach the plug wire, hall sensor, magnet, enclosure, wire/plug to attach to a battery, and a cable to ground to the engine case. Total cost should be in the $80-85 range.

The TIM-6 system with the “PE” coil plus shipping is in the $50 range, and will need some wiring and a plug to attach to a battery.

I would assume both systems would be happy with about a 1200 mah 6 volt battery.

I would also guess that with both systems one would want to run a resister plug and a shielded plug wire.

Does that pretty much summarize both systems?

Ramrod25

RE: RE: Scratch Built Ignition???
 

Apparently no one read post #129..guess I was ASSuming again....:D

RE: RE: Scratch Built Ignition???
 

Has anyone sucessfully ran a Tim 6 unit w/hall effect on a gasser for any length of time let alone flew one?I've had mine running on a Q35 but I must say not that reliably and certainly could'nt trust it in the air just yet.I've found I'm loosing approx.1/2 volt thru switching transistor and about 1/4 volt to the coil thru everything else.I'm using a little heavier switch and wiring and going to a 6 volt 1300 Mah. pack in hopes of keeping the unit above the threshold that it cut's off for a longer period of time.My Q35 static timing is approx 28btdc. and dwell is 75 deg. Thanks[&:]

RE: RE: Scratch Built Ignition???
 

Rcign1, Which spark coil do we need to get from CH??

RE: RE: Scratch Built Ignition???
 

HEY: WHEN ARE YOU GOING TO FINISH SMOKIKG THAT STOOGIE?? HA! Capt.n:D

RE: RE: Scratch Built Ignition???
 

Either one works well..the gray one has mounting lugs, the other doesn't...

RE: RE: Scratch Built Ignition???
 

I have a CDI system that I would also like to sell as an after market item. I am looking for feed back from modelers that want to do some or all of the conversion to their weed whacker engines. I can supply a circuit board assembled with or without connectors for the hall switch and HV coil. I have successfully run engines using coils from CH, D&B, Zenoah, Model Electric PE coils. I can supply coils, hall switches and magnets. I am willing to work with anyone wishing to do a conversion to figure out what the best options might be. I would also invite a qualified active member to evaluate part or all of my system and report back to the community. I don't think you will have much luck with the Tim 6 unit, as I am quite sure it is designed for the old time engines and they do not require the spark energy that our engines do. I have just finished testing a Feather Lite 18cc engine. Total weight was 38.308 oz. and it was able to turn a Master Airscrew Classic 16x8 prop at 6500 rpm. I know you'll ask so my best guess on retail for the circuit board with no connectors will be in the $50 to $55 dollar range. I have not been able to find any inexpensive GOOD coils. The circuit I designed uses a PIC Micro chip and retards the spark to approximately TDC for starting and from full advance to full retard from approximately 3000 rpm to idle speed. I have engines that will idle at 1000 to 1200 rpm. I spent the 2003-flying season tweaking the system mounted on a 60cc Echo engine flying a giant scale Stinger. I would like to thank everyone in advance for your time and feed back. Thanks, Roy Sholl

RE: RE: Scratch Built Ignition???
 

That sounds very interesting - could you post a picture of your featherlite for us to see??

Thanks
Ramrod25

RE: RE: Scratch Built Ignition???
 

Hi,

Your project sounds great and I would be glad to help in any way I can. The CH Ignitions unit works very well, and they are nice to work with, but darn it, 89.95 is just too much in my opinion. I really think it could be done cheaper, and a person could still make a buck.

Let me know if I can assist, and feel free to check out my posts/activity. I have engines from 23 to 58cc, of various makes.

Capn John... things are going well and I will post those pics you wanted to see tonight if I can get to it!

Take care and good luck,
AV8TOR

RE: RE: Scratch Built Ignition???
 

av8tor: Thanks for the reply. I agree about the prices should be less. Capt,n

RE: homebuilt ignition
 

:DWell all, I called Ch on Friday and talked to Bill. He said that his spark coil wouldn't work with the tim-6. He said that the modelelectric coil is the one for that system as Dr Crash has used in his. He did make an offer I couldn't resist. Spark coil and board wired for a little over 50.00:D. So I said sure. Still will have to buy a modelelectric coil or find used a 6 volt motor cycle coil to get the tim-6 running..So off to the junk Yd[>:] in the morning..........

RE: RE: RE: Scratch Built Ignition???
 

Hi Rambo RCU
just going over some of the back posts you mention your Q35 not running well on the tim-6 ing. If I remember right we use to run thoughs at about 7 dto 7500 the 75 deg. of dwel would be excessive as I think I figured about 51 deg. at that rpm if that is correct the longer dwell would heat the coil and make it short lived well just a thought. Luck

RE: RE: RE: Scratch Built Ignition???
 

It's not the dwell that heats the coil, it was never made to take the voltage a CD circuit puts into it, somewhere around 300 volts..The insulation is just not good enough for sustained operation...
My belief that most people don't read these threads has been reinforced...Read post #113 :eek:
Hey, if Bill will do that forget post #`113...Very little profit there....:D
And it COULD be done, just takes cubic $$$ to buy enough to get started..Go for it, join all the other businesses that have moved overseas...[sm=drowning.gif]

RE: RE: RE: Scratch Built Ignition???
 

Well said Rcign1. At the rate we are going the only items we will be able to buy U.S. made will be Grain. I think the fellows that are playing around here are just trying to find a way to lighten the weed eaters and chainsaw engines without spending a small fortune for the major manufactures. I know for a fact that being on a limited income one needs to conserve resources. BTW thanks for all your input and help on the Universe the past years......:D:D:D

RE: RE: RE: Scratch Built Ignition???
 

Here is post #113 Anyone wants another "blue light special" I will sell you a built and tested circuit and a hall sensor and magnet for $35 plus shipping..It takes 200 ma at any speed and will run on 4.8 or 6 volts..I have used these for 16 years and they are very reliable...They are larger than the C&H circuit....You will need a spark coil ..This is the bare circuit only, no box..
Coils are available from C&H, boxes from Radio Shack....I don't recommend Modelelctric coils because of the high voltage input from the CD circuit..... end of post#113

RE: RE: RE: Scratch Built Ignition???
 

Balsaone thanks for your input as to the coil being overly dwelled i did my calculations based on 9,000 rpm which is quite possible in a dive that should figure out to about 75deg. dwell if I figured correctly >BTW i'm using the Tim-6 circuit so should'nt be sending too much voltage to coil and have never even noticed it anyting but slightly warm.Did you say you have definately ran your engines on Tim-6 circuit?Iv'e ran mine several times with varying results one time it particular it ran so well it surprised me .Later Dude

RE: RE: RE: Scratch Built Ignition???
 

Dwell is Dwell. It has nothing to do with RPM. It is an amount, expressed in degrees, that current is flowing in the coil.