Re: Re: News from Romania

From: <tpopa_at_rdslink.ro>
Date: 17 Mar 2007 18:29:49 -0000

Some answers:
I dont know the rpm during the flight ( I dont know if he measured something during his flights because this is interesting if you are using vp prop) but I can tel you he had around 13 min of climbing.
His e-mail address is corneliu.mangalea_at_gmail.com but he is a very busy man, You can try.
Of course he had a fin, about 80 mm in front of tail, made of boron.
He backed off 30 to 40 turns, I've started with higher torque than him using 1.23 g/m rubber and did around 34 min, and I was over the lamps.
Regards
Aurel Popa




Pe 17 Mar 2007, la 01:58, John Kagan <john_kagan_at_hotmail.com> a scris:

>Great job to Cornel! Did anyone get any rpm counts during the=20
>flight? It would be interesting to see how much flare the prop had.=20=20
>Also, how much backoff before launch.
>
>Congratulations!
>
>--- In Indoor_Construction_at_yahoogroups.com, "popaf1d1" <tpopa@...>=20
>wrote:
>>
>> Dear friends,
>>=20
>> We had 2 training sessions this year in the salt mine,Feb 8th to=20
>> 10th, and March 9th to 11th.=20
>> Conditions were as usual in the winter, 10.1-10.2 Celsius degrees=20
>> and relative humidity 37% in February and 43 % in March.=20
>> We were 5 people in mine, so the conditions were perfect.=20
>> The nice story began with Cornel, flying 19 :30 with half rubber,=20
>> then 38:20 next day, full rubber. All the others, around 34 minutes.
>> In March, Cornel came back with a new model and a new prop, I came=20
>> back with 4 new models. Soon after our arrival, Cornel did 19:50=20
>> with the new model and, immediately, 39:25 with, maybe, 5 seconds=20
>of=20
>> stirring. He was about 10 meters from the ceiling, landed with 80=20
>> turns, so we all waited for the first over 40 minutes flight with=20
>> new F1D in the salt mine. Next day, he stirred his model in the=20
>wall=20
>> just under the lamps, injuring the wing and the prop. After fixing=20
>> them he flew 38:30 and 38:50 not climbing near the ceiling. All the=20
>> others did the same around 34 minutes.=20
>> I shared the table with Cornel, so I can give you some details=20
>about=20
>> his models and flights:
>> - weight of the model: exactly1.2gr.
>> - motor stick length : 290 mm
>> - tailboom length: 570 mm
>> - first wing post: 40 mm from nose
>> - wing posts height: around 19 mm
>> - 1.256-1.260 g/m May99 rubber
>> - 1700 =96 1740 turns on board
>> - 60-80 turns left
>> - 42.9 =96 43.1 average rpm
>> - positive flaring prop - 480 dia., 760 pitch
>>=20
>> I will try to put a picture in the photo section.
>> It was really beautiful.
>>=20
>> Regards,
>> Aurel Popa
>>
>
>
>
Received on Sat Mar 17 2007 - 11:29:55 CET