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Old 28 April 2009, 08:04 AM   #251 (permalink)
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real nice pavel
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Old 11 May 2009, 07:19 PM   #252 (permalink)
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IMG_1580.jpgPropeller flange GQ mark 70
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Old 11 May 2009, 07:27 PM   #253 (permalink)
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More progres on aircraftIMG_1575.jpg

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Old 11 May 2009, 07:33 PM   #254 (permalink)
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Old 11 May 2009, 08:06 PM   #255 (permalink)
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I didn't know the Mark 70 had a planetary gear box? Do you know the ratio? The output is the planet carrier, so the ratio shall be larger than 2:1.
Jan
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Old 11 May 2009, 09:28 PM   #256 (permalink)
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Quote:
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I didn't know the Mark 70 had a planetary gear box? Do you know the ratio? The output is the planet carrier, so the ratio shall be larger than 2:1.
Jan
at 2250 engine RPM is 1800 prop RPM.

Pavel
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Old 13 May 2009, 07:04 AM   #257 (permalink)
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I check numbers again and find that I did mistake. Prop 1700 RPM is 2400 RPM on engine. The HP rated for this is 210-245 HP.

Pavel[/QUOTE]
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Old 15 May 2009, 06:28 AM   #258 (permalink)
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Post#6, This thread:
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Good staff


That me I'm interested inn1 WW long time, now I try get in. The 39 K is complete kit no engine, instruments etc...

Yes I have coming two engines Gypsy Queen 175 with gear box, no secret about that. This will be good choose for DVII. 1600 RPM at engine 2200 RPM also fuel injected too.
Pavel
Can't seem to nail that number down , eh?


Anyway....don't these 70's have a history of crankshaft cracking failures that require some modifications? I seem to recall the FAA issuing an AD somewhere in the 60's addressing this problem and DH(or Bristol-Siddeley) having a book on required "modifications". Obviously, nothing that is required for your aircraft, but perhaps recommended. What are the "modifications" that were required and how does one determine if previously complied with?

Wonderful looking ship Pavel!
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Old 15 May 2009, 06:57 AM   #259 (permalink)
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Post#6, This thread:


Can't seem to nail that number down , eh?


Anyway....don't these 70's have a history of crankshaft cracking failures that require some modifications? I seem to recall the FAA issuing an AD somewhere in the 60's addressing this problem and DH(or Bristol-Siddeley) having a book on required "modifications". Obviously, nothing that is required for your aircraft, but perhaps recommended. What are the "modifications" that were required and how does one determine if previously complied with?

Wonderful looking ship Pavel!
I shall check FAA A/D list and let you know.
Thanks for note.

Pavel
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Old 15 May 2009, 08:10 AM   #260 (permalink)
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There are two AD's that show up in the search ...

the one for the crankshaft:
BRISTOL SIDDELEY Model Gipsy Queen Series 70 Engines

and the other for an oil issue that effects the propeller. I don't know if this one is for a variable prop, so it may not apply to the fixed pitch prop.

De HAVILLAND GYPSY QUEEN Model 70-4, 70, 70-2, and 70-3 Engines
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