Looking for a Harvard MK 4 throttle quadrant (British style mixture "rich" aft).
Thanks to PM me WITH YOU E-MAIL as I can not PM yet (too new to the site)
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| WANTED Throttle Quadrant for Harvard MK 4 https://www.warbirdinformationexchange.org/phpBB3/viewtopic.php?f=52&t=51916 |
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| Author: | The Frog [ Mon Feb 17, 2014 3:18 am ] |
| Post subject: | Re: WANTED Throttle Quadrant for Harvard MK 4 |
Looking for a Harvard MK 4 throttle quadrant (British style mixture "rich" aft). Thanks to PM me WITH YOU E-MAIL |
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| Author: | The Frog [ Mon Feb 17, 2014 12:56 pm ] |
| Post subject: | WANTED Throttle Quadrant for Harvard MK 4 |
Looking for a Harvard MK 4 throttle quadrant (British style mixture "rich" aft). Thanks to PM me WITH YOU E-MAIL as I can not PM yet (too new to the site)
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| Author: | Chunks [ Tue Feb 18, 2014 12:18 am ] |
| Post subject: | Re: WANTED Throttle Quadrant for Harvard MK 4 |
PM sent. Trying to post pic but not as easy with an iPad. Chunks |
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| Author: | bdk [ Tue Feb 18, 2014 10:50 am ] |
| Post subject: | Re: WANTED Throttle Quadrant for Harvard MK 4 |
In case you end up needing to assemble one from parts, the quadrant is essentially the same as T-6. The linkage setup changes the mixture rich from forward to aft, nothing in the quadrant itself. The spacers in the quadrant can be changed to either style to get the correct markings. The throttle handles are also interchangeable to the Harvard 4 style. I am not aware of a source of spare parts for the throttle quadrants, but if someone reading this knows of one, please post that information. |
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| Author: | The Frog [ Tue Feb 18, 2014 11:00 am ] |
| Post subject: | Re: WANTED Throttle Quadrant for Harvard MK 4 |
BDK you are correct The challenge is in the latches that are different and hard to find My Harvard had been modified to the T6 quadrant and I am trying to change it back to original. All fun... |
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| Author: | bdk [ Tue Feb 18, 2014 6:01 pm ] |
| Post subject: | Re: WANTED Throttle Quadrant for Harvard MK 4 |
What "latches" are you referring to? |
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| Author: | The Frog [ Tue Feb 18, 2014 6:28 pm ] |
| Post subject: | Re: WANTED Throttle Quadrant for Harvard MK 4 |
When the Canadian Car and Foundry manufactured the Harvard MK4, the ones that went to the US (under T6J and those under 4M) had the North American quadrant (mixture rich forward etc) The Harvard MK 4 under RCAF were equipped with the quadrant modified to British Standard. There are 2 latches, one on the throttle handle base and one on the Mixture lever. Those are not found on the T6 style. I posted a few pictures on my Barnstormers add https://www.barnstormers.com/listing_im ... ?id=858573 , please take a look as photos are worth a 1000 words:) Also, the Harvard MK 4 was equipped with a long aluminum throttle handle instead of the knob. Cheers, Olivier |
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| Author: | bdk [ Wed Feb 19, 2014 11:20 am ] |
| Post subject: | Re: WANTED Throttle Quadrant for Harvard MK 4 |
Thanks for that, I've never seen (or at least noticed) the latches, probably because they are not required in the US with the reversed mixture control. Now if I see one, I'll know what it is! |
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| Author: | Yak3 [ Sun May 25, 2014 3:40 am ] |
| Post subject: | Re: WANTED Throttle Quadrant for Harvard MK 4 |
Hi Olivier, Your mentioning the Harvard 4 throttle having a long aluminium grip got me thinking about my T-6D which has such a handle on the rear throttle. It isn't fixed and rotates freely, is about the width of ones palm and has a standard British round Bakelite push-button recessed slightly in the end of the grip. However, it doesn't have the latches as illustrated in the Barnstormers photo (understandably for the same reason you wouldn't have a friction control in the back). Does this sound like a Harvard 4 rear throttle? It may not be available as while we have a box of throttle bits with enough parts to make up a replacement rear unit for the D, we also have a Harvard 4 which is lacking a rear throttle (and a front throttle for that matter if any more are found). |
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| Author: | rcaf_100 [ Mon May 26, 2014 9:20 pm ] |
| Post subject: | Re: WANTED Throttle Quadrant for Harvard MK 4 |
Yak3 wrote: Hi Olivier, Your mentioning the Harvard 4 throttle having a long aluminium grip got me thinking about my T-6D which has such a handle on the rear throttle. It isn't fixed and rotates freely, is about the width of ones palm and has a standard British round Bakelite push-button recessed slightly in the end of the grip. However, it doesn't have the latches as illustrated in the Barnstormers photo (understandably for the same reason you wouldn't have a friction control in the back). Does this sound like a Harvard 4 rear throttle? It may not be available as while we have a box of throttle bits with enough parts to make up a replacement rear unit for the D, we also have a Harvard 4 which is lacking a rear throttle (and a front throttle for that matter if any more are found). If it has the British-style Air Ministry Bakelite switch, it would most likely be from a wartime Harvard Mk II, IIb or III. Postwar units had a up/down toggle switch for intercom and transmit functions. 
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