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docclv(at)windstream.net
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 Posted: Sat Dec 03, 2016 12:27 pm Post subject: Max RPM on D4A5 Lycoming |
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Carlos: You are right. The D4A5 is rated at 260hp at 2750rpm. I had
the same problem with the engine reving to only 2500 rpm with the
initial Hartzel governor Van's sent. We tried adjusting the stop on the
governor, etc. to no avail. I finally checked what governor was
recommended for a Hartzel prop (in our case) and found out Van's sent
the wrong governor! Make sure you have a S-1-32 governor. Doc N123CV
#41087
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Sat Dec 03, 2016 2:58 pm Post subject: Max RPM on D4A5 Lycoming |
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Actually the redline is 2700, NOT 2750. The last 125 rpm only get you from 250 to 260 hp.
-sent from the I-droid implanted in my forearm
On Sat, Dec 3, 2016 at 1:26 PM, Doc <docclv(at)windstream.net (docclv(at)windstream.net)> wrote:
| Quote: | --> RV10-List message posted by: Doc <docclv(at)windstream.net (docclv(at)windstream.net)>
Carlos: You are right. The D4A5 is rated at 260hp at 2750rpm. I had the same problem with the engine reving to only 2500 rpm with the initial Hartzel governor Van's sent. We tried adjusting the stop on the governor, etc. to no avail. I finally checked what governor was recommended for a Hartzel prop (in our case) and found out Van's sent the wrong governor! Make sure you have a S-1-32 governor. Doc N123CV #41087
====================================
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Kelly McMullen
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Mauledriver(at)nc.rr.com
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| Posted: Sun Dec 04, 2016 6:51 am Post subject: Max RPM on D4A5 Lycoming |
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Yes, 2700. I have the stock setup as well.
I can't be specific here but my very experienced and totally 'anal' Tech Counselor, who I have immense respect for, identified an issue with the throttle assembly during prep for the first starts and flight. He considered it important enough to insist that we drill a new hole in the throttle arm so that the throw was adequate (I was not happy with such a mod to the stock Vans setup but he insisted).
I thought it was a low RPM issue but I know that a new hole in the arm would change the entire range - that's as much as I can say with any actual understanding. It performed perfectly after that slight mod - low idle to 2700 though I recall making a small adjustment at the governor. While I have to assume it was something specific to my build - it was all stock from my perspective.
So, the stock setup is not dead nuts perfect.
Background - my TC inspected my work annually or as requested and seemed to be satisfied enough with this first time builder's efforts to leave me alone. He NEVER put hands on or insisted on changes EXCEPT for the stock throttle linkage. I never completely understood the problem but he insisted and I knew enough to follow. He drilled the hole.
Bill "hope that helps a bit" Watson
On 12/3/2016 5:58 PM, Kelly McMullen wrote:
| Quote: | Actually the redline is 2700, NOT 2750. The last 125 rpm only get you from 250 to 260 hp.
-sent from the I-droid implanted in my forearm
On Sat, Dec 3, 2016 at 1:26 PM, Doc <docclv(at)windstream.net (docclv(at)windstream.net)> wrote:
| Quote: | --> RV10-List message posted by: Doc <docclv(at)windstream.net (docclv(at)windstream.net)>
Carlos: You are right. The D4A5 is rated at 260hp at 2750rpm. I had the same problem with the engine reving to only 2500 rpm with the initial Hartzel governor Van's sent. We tried adjusting the stop on the governor, etc. to no avail. I finally checked what governor was recommended for a Hartzel prop (in our case) and found out Van's sent the wrong governor! Make sure you have a S-1-32 governor. Doc N123CV #41087
====================================
br> fts!)
r> > /www.aeroelectric.com" rel="noreferrer" target="_blank">www.aeroelectric.com
w.buildersbooks.com" rel="noreferrer" target="_blank">www.buildersbooks.com
p.com" rel="noreferrer" target="_blank">www.homebuilthelp.com
e.com" rel="noreferrer" target="_blank">www.mypilotstore.com
" rel="noreferrer" target="_blank">www.mrrace.com
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
-Matt Dralle, List Admin.
====================================
-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?RV10-List
====================================
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
====================================
WIKI -
errer" target="_blank">http://wiki.matronics.com
====================================
b Site -
-Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
====================================
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