REFLECTOR: Obtaining Repairmans Certificate - Static RPM

Thu Mar 22 15:31:54 CDT 2012

Yup.  I've had all those experiences as well.  I also notice a smell if 
I retract quickly.  The first time I thought something electrical was 
overheating, but figure it must be the brakes.  Before you go to the 
trouble of taking the prop apart, you might want to try what I do - 
taking off at reduced power.  I add power to get 2300 rpm.  The 
acceleration is noticeably less, however the TO roll doesn't change that 
much.  I get a comfortable climb at initially 500 fpm and then 1000-1500 
fpm once the gear is up.  The rpm gradually increases to 2600 and I 
don't have to adjust the prop or the pitch.  I believe this performance 
is similar to what you would get if you added the washer(s) (and used 
full power).  The advantages are.

1)  Not taking the prop apart

2)  Not beating up the engine every time you take off

3)  You still have max TO/climbing capability should you ever need it.

John

On 3/22/2012 2:51 PM, Laurence Coen wrote:
> John,
>
> Yes I am still going to do that.  The way it works now on take off I 
> wait till 90 KT before raising the gear and by the time it's fully 
> stowed I'm at 100 KT and the engine is going over speed if I don't get 
> on it post haste. My current work around is to pull the prop back a 
> tad just before raising the gear.  Takeoff is a busy enough time 
> without adding another step.  I would like to see no more than 2700 
> RPM at 100 KT.  I generally climb at 110 KT and 2600 RPM.  By the way 
> if I don't wait for 90 KT to raise the gear I smell burning rubber 
> when the spun-up nose wheel rubs on the gear doors. Scared the 
> pee-wizz out of me the first time that happened.
>
> Larry Coen
> N136LC
>
> --------------------------------------------------
> From: "John Dibble" <aminetech at bluefrog.com>
> Sent: Wednesday, March 21, 2012 8:49 AM
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> Subject: Re: REFLECTOR: Obtaining Repairmans Certificate - Static RPM
>
>> Larry,
>>
>> Are you still planning to add a washer?
>>
>> John
>>
>> On 3/20/2012 11:20 AM, Laurence Coen wrote:
>>> With three blades and one washer I can get 2500 RPM static with my 
>>> Franklin IVO.  High speed taxi test 2600+ RPM.  In testing for max 
>>> cruse at 8000 ft I found a 2 KT increase from 2600 RPM to 2700 RPM 
>>> and no increase at 2800 RPM. If it runs good at 2600 RPM you're golden.
>>>
>>> Larry Coen
>>> N136LC
>>>
>>> --------------------------------------------------
>>> From: "John Dibble" <aminetech at bluefrog.com>
>>> Sent: Tuesday, March 20, 2012 10:58 AM
>>> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>>> Subject: Re: REFLECTOR: Obtaining Repairmans Certificate - Static RPM
>>>
>>>> Brian, There's something wrong if you can't get high rpm with 3 
>>>> blades. What is your fuel burn rate at idle?
>>>>
>>>> John
>>>>
>>>> On 3/20/2012 10:20 AM, Brian Michalk wrote:
>>>>> Yeah, I think it does.  The FAA knows about it too.  They were all 
>>>>> over the "investigation", and had me do a check ride.  After it 
>>>>> was all over, the FAA was actually pretty reasonable, except for 
>>>>> the CYA parts.
>>>>>
>>>>> The guy that came to inspect the damage said he'd recommend no 
>>>>> further action.  Then, they contacted me for a check ride, and the 
>>>>> examiner said it was recommended from the first guy that I go 
>>>>> through the check ride. Whatever.  Interesting comment from the 
>>>>> reviewer said, "next time, get the plane back on the runway."
>>>>>
>>>>> I currently am configured with two blades on the IVO.  The reason 
>>>>> is so that I can hit higher RPMs for testing.  One of the issues I 
>>>>> identified prior to the first flight was the lack of high RPM 
>>>>> testing.
>>>>>
>>>>> On 3/20/2012 8:53 AM, John Dibble wrote:
>>>>>> Does landing in a cornfield count as a flight?
>>>>>>
>>>>>> Brian.  Are you still using 2 prop blades?
>>>>>>
>>>>>> John
>>>>>>
>>>>>> On 3/19/2012 10:50 PM, sbjknox wrote:
>>>>>>>
>>>>>>> From: "Brian Michalk" <michalk at awpi.com>
>>>>>>>
>>>>>>> Subject: REFLECTOR: Obtaining Repairmans Certificate
>>>>>>>
>>>>>>>
>>>>>>>> Three years ago I had my first flight and put the plane into a 
>>>>>>>> cornfield. Ever since then, I've been rebuilding, and didn't 
>>>>>>>> pay any attention to getting my repairmans certificate.  Now, 
>>>>>>>> of course, I need to sign off the annual inspection, and could 
>>>>>>>> do it myself if I had my certificate.  So, I looked at the 
>>>>>>>> form, and it says I have one year from the date of the first 
>>>>>>>> flight to get my certificate.
>>>>>>>>
>>>>>>>> Is this set in stone?  I'm getting ready to go to the SAT FSDO 
>>>>>>>> and apply.
>>>>>>>
>>>>>>> Brian, I think you are becoming forgetful...it was actually nine 
>>>>>>> months ago.
>>>>>>>
>>>>>>> Sid Knox
>>>>>>> Oklahoma
>>>>>>>
>>>>>>> Velocity  173 RG  N199RS
>>>>>>> Starduster  N666SK
>>>>>>> KR2         N24TC
>>>>>>> W7QJQ
>>>>>>>
>>>>>>>
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