Today's Message Index:
----------------------
1. 03:51 AM - Re: Float performance tool (Peter C)
2. 06:46 AM - Re: Float performance tool (John A. Nielsen)
Message 1
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| Subject: | Re: Float performance tool |
John, what is your data so I can play with the formula. There isn't much
reason why my formula should work. I have no real knowledge of the
relationship between float volume, hp, weight and wing area. It was just
curious that it seemed to be right for a 170 and a Rans.
Peter
----- Original Message -----
From: "John A. Nielsen" <john@nielsenford.com>
Sent: Friday, June 15, 2007 6:21 PM
Subject: Re: Seaplane-List: Float performance tool
> <john@nielsenford.com>
>
> I entered my plane's data and it predicted 11 seconds. Proven by this
> video taken Sunday, my take off is more like 6 seconds.
> http://www.youtube.com/watch?v=iEQ-1yzL8XE
> John Nielsen
> Bloomer WI
> Challenger II on Puddle Jumper Amphibs
>
> Peter C wrote:
>> Would any of you guys on floats provide some examples of what take-off
>> times
>> you are getting?
>> The attached spread sheet contains a simplified version of the formula on
>> the Stinson site. This one just multiplies wing loading, power loading
>> and
>> float loading times a constant.
>>
>> The two Rans examples look pretty good in that they are close to my
>> actual
>> numbers. The 170 number is also pretty close. The original formula gave
>> me a
>> time of 5 or six seconds which is way off. If you play with different
>> weights this one seems to work. Not sure if variations in hp work as
>> well.
>> Since I'll also be trying two more sets of floats on this plane the
>> affect
>> of buoyancy will also be stest.
>> Peter
>>
>
>
>
Message 2
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| Subject: | Re: Float performance tool |
Here is your file back with the data from my plane.
Also attached is the complete W&B and performance spec sheet for the
Challenger on wheels and floats. Hope this helps.
John
Peter C wrote:
>
> John, what is your data so I can play with the formula. There isn't much
> reason why my formula should work. I have no real knowledge of the
> relationship between float volume, hp, weight and wing area. It was just
> curious that it seemed to be right for a 170 and a Rans.
> Peter
> ----- Original Message ----- From: "John A. Nielsen" <john@nielsenford.com>
> To: <seaplane-list@matronics.com>
> Sent: Friday, June 15, 2007 6:21 PM
> Subject: Re: Seaplane-List: Float performance tool
>
>
>> <john@nielsenford.com>
>>
>> I entered my plane's data and it predicted 11 seconds. Proven by this
>> video taken Sunday, my take off is more like 6 seconds.
>> http://www.youtube.com/watch?v=iEQ-1yzL8XE
>> John Nielsen
>> Bloomer WI
>> Challenger II on Puddle Jumper Amphibs
>>
>> Peter C wrote:
>>
>>> Would any of you guys on floats provide some examples of what
>>> take-off times
>>> you are getting?
>>> The attached spread sheet contains a simplified version of the
>>> formula on
>>> the Stinson site. This one just multiplies wing loading, power
>>> loading and
>>> float loading times a constant.
>>>
>>> The two Rans examples look pretty good in that they are close to my
>>> actual
>>> numbers. The 170 number is also pretty close. The original formula
>>> gave me a
>>> time of 5 or six seconds which is way off. If you play with different
>>> weights this one seems to work. Not sure if variations in hp work as
>>> well.
>>> Since I'll also be trying two more sets of floats on this plane the
>>> affect
>>> of buoyancy will also be stest.
>>> Peter
>>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
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