kpeng
Joined: 01 Apr 2011
Posts: 18
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 Posted: Thu Oct 15, 2015 3:38 am Post subject: Arblast PV50 C/Speed Propeller DC Motor Replacement |
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That's funny, I've got all brand new components from EMS ltd delivered on 13th Oct sitting on my desk ! I recall emailing you on the 21st Sept a quotation copy of the said parts. I have the brass screw thread, the turned part the brass screw is mounted in. Also the bearings. If you re-visit your emails from me Alan I asked if I could borrow your old aluminium mounting turned part so we could get it reverse engineered.... ?
K Kedward
G-okev
Sent from my iPhone
| Quote: | On 15 Oct 2015, at 11:19, Alan Carter <alancarteresq(at)onetel.net> wrote:
Hello All on Forum.
First of all i must say a big thank you to Ms Tendai Mugweni who gave me an excellent help and service, as an Ex CAA Examiner I rarely would give 10/10 but the score is 11.
So if you need a motor this is the place to go.
Electro Mechanical Systems Ltd
www.ems-limited.co.uk
Tel: 0118 9817391
Arblast Propellers as you know have ceased trading so spares are difficult to obtain, I have been looking for the small electric motor which changes the propellers pitch.
After many e-mail and phone calls i have finally tracked down the components, I have done all the hard work so here it is my PV50 flyers.
CS Unit Drive.
Its a small electric motor which drives a planetary gear head which then mechanically turns a jack screw forward or backwards either increases or decreases the blade pitch angle.
The amount of and aft movement of the jack screw is controlled by two micro switches, connected to the DC motor and reversing the polarity changes the motors direction of rotation .
This is the motor and fitting kit, the Gear Head is at extra cost and not listed here, but its 246 to 1 drive ratio gear head if you need one.
“Note” the first two numbers refer to the motors diameter ie 23 or 22 the last two numbers are the voltage 12 or 06.
Seems to me that all the PV50s CS unit had 6 volt motors on the aircrafts 12v system as mine is and i expect yours is, when measured gives 11.9v at the terminal on the motor.
On the motors end a small plastic plate cover states ”FAULHABER” Made in Germany , 2224U006SR, R59, 3909.
The R59 denotes the motor has coils at the segment end.
The 2224U0006SR isn’t a like for like replacement for the 2224U006SR-59, due to the special option “59”, which means that the motor has coils for end/commutator seg secured with special adhesive
So your identical replacement would be a 2224U006SR, R59, 3909, But i have used the 2224U006SR. at £67.5 which works well, But an upgrade to match the aircrafts system of 12v would be the 2342S12CR at £167.5
but in doing this you would need the G23m16 fitting kit to attach it to the Gear Head, ( i have not done this yet but think the fitting kit is the ”blue alloy collar” in which the two ie Motor and Gear Head are joined in with adhesive.)
The Gear Head is 246 to 1 as used by Arblast but it is possible to have a 406 to 1 which is slower but puts the motor under less load, but better go for the more expensive 12v motor.
Back at the rear of this lot is a housing with the two Micro Switches which have a diode across two of the terminal, The mirco switches levers run along a shaft and are set at the propeller Fine and Course stops.
Removal of Motor.
To remove the Motor, unsolder or cut the two wires as close as possible to the motors terminals, Remove the tape from the shaft.
The “Blue Alloy Collar” with light pressure applied to a pair of grips turn the Collar to brake seal, then unscrew by hand, Gently withdraw the motor and pinion from the gear box.
Be careful not to disturb the planetary gears as you withdraw motor and pinion, and the fine metal gear retaining washer in front of the gear box.
With the motor now out, On a table look for and remove the “fine hair wire” ” U “ clip. Which is Bond in at one end, ( God knows what this is for, seems to doing nothing as i see it) ????
Be careful not to loose it. ( But if you can see a use for it, i would like to know.)
Remove the Blue Collar from the motor, by unscrewing the 3 small screws inside the collar.
Now pull the collar off from the motor, the two surfaces may have been bonded with Loctite 638, mine was not. (But it is Recommend as listed in text.)
Now you have the little motor in your hand.
Replace in reverse order.
When bonding the motor to the gearhead we suggest you use adhesive Loctite 638 – this offers high strength, high temperature resistance and is ideal for bonding small gaps.
Before re soldering the wire two the motor,” hold the wires on terminals to check the prop works in correct direction/ toggle switch up for fine, toggle down for course.”
change wires round the other way if it dose not work, check, then finally solder wires onto terminals.
No Workshop Manual is Available , So that,s it.
DC Motors.
1-4pcs 2342S012CR £119.08 + VAT Due to stock availability in Switzerland (subject to prior sales) the lead time is estimated at 2 – 3 working weeks from receipt of an
order/payment.
1-4pcs 2224U006SR £56.25 + VAT Due to stock availability at EMS(subject to prior sales) therefore please consider 2-3 working days from receipt of an order/payment.
Fitting kits are generally provided free of charge when ordered with a gearhead but when ordered separately please note the buy prices would be as follows;
G23m18 (Kit required when fitting a 2224U006SR to 23/1 gearhead) £18.85 + VAT please consider 2-3 working weeks
G23m16 ( Kit required when fitting a 2342S012CR to 23/1 gearhead) £21.15 + VAT please consider 2-3 working weeks
12v Motor,2342S012CR DC Motor plus Fitting Kit G23M1623/1 “£168.28 including VAT” please consider 2-3 working weeks
Kindest regards
Ms Tendai Mugweni
Electro Mechanical Systems Ltd
www.ems-limited.co.uk
Tel: 0118 9817391
I have done all the hard work Mr Jeffers as instructed .Happy days
Regards.
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447961#447961
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