Author Topic: c/n 2528, N6309V  (Read 2342 times)

Doug Johnson

c/n 2528, N6309V
« on: June 18, 2015, 04:00:45 PM »
2 picture check your albums. Please do an internet search maybe you'll come up with one I couldn't find, I need all the help I can get.

Previous posts about or anything click on   http://flyhelio.com/smf/index.php?action=search  Enter ?

c/n 2528, built 12/65 as model H-250 original registry N6309V (reused) Factory placed in experimental category as test bed for at least two models
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N6309V (reused) converted 07/69 to market evaluation and proof of concept prototype Prop-Jet courier model H-370 with 317 shp Allison 250-B15G Turbine Engine and Hartzell HCA3-YF-5 prop, evaluation showed little increased performance and large increase in fuel use, a type certificate was never pursued and the project was dropped.

As we all know the concept has never been completely dropped see N613SD c/n 1709 converted to a H/T-420T model and N400HE c/n H-22 a H/T-840T model both very successful experimental conversions there is also N700AA H-15 converted to "Jenson Turbo Courier" H/T-1500 model  and N88726 c/n 559 converted to H-420T Jim Perry made this conversion little known.
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N6309V (reused) was converted 07/71 to 3rd trigear using (STC SA1399SW) and Lyc GO-480-G1D6 eng (STC SA1383SW) and 1400 series enhancements using Helio kit # k-115 installed electric flap and trim, also trapezoidal rear windows, dorsal fin and interior used also used on 1700 series the production trigear A/C, pretty much a proof of concept model HT-295 it was sold as modified H-250 07/71, International aviation Technical services inc (A. Hundere) TX 09/72, dereg exported as XC-SEW Mexico committee Federal Program Manager School Construction transport director, unknown location or current condition ?


As always any further information or pictures would be greatly appreciated.






1st article





2nd article

« Last Edit: January 16, 2016, 09:57:48 AM by Doug Johnson »
Doug

Doug Johnson

Re: c/n 2528, N6309V
« Reply #1 on: December 06, 2015, 05:49:42 PM »
added pic and test flite of proto H-370 conversion H-250 c/n 2528 compared to 1400 series c/n 1407

Added mag article on proto H-370 because I found the article interesting especially the part about a vertical descent and recovery at 200', since I recall the manual calling for 200' for recovery from vertical descent.

I have done 100s of vertical descents with a Kasperwing ultralight and it is really hard to judge distance above ground unless you have a ref to look at sideways. I would think you would need a radar altimeter and a lot of practice before you used a vertical descent as a common maneuver.

« Last Edit: January 13, 2016, 02:01:11 AM by Doug Johnson »
Doug

paullapoint

Re: c/n 2528, N6309V
« Reply #2 on: December 06, 2015, 08:02:59 PM »
Great article Doug! I like the fuel and engine prices. Paul

Jason Stephens

Re: c/n 2528, N6309V
« Reply #3 on: December 08, 2015, 02:51:49 PM »
Even Wayne Handley, a very experienced airshow guy, hit the ground really hard while doing a vertical decent in his Turbo Raven a few years back.

Doug Johnson

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« Reply #4 on: January 13, 2016, 01:58:17 AM »
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« Last Edit: January 16, 2016, 10:23:56 AM by Doug Johnson »
Doug

Doug Johnson 1

Re: c/n 2528, N6309V
« Reply #5 on: August 11, 2017, 08:36:32 AM »
Found a picture of c/n 2528 as what looks to be as original H-250 sitting out front of the Helio factory, along with some brand new U-10Ds, so probably mid '67, it was converted to the H-370 propjet in '69

Kind of an interesting view of the modest Factory in the background.

« Last Edit: August 11, 2017, 08:41:40 AM by Doug Johnson 1 »

Kevin Dunn

Re: c/n 2528, N6309V
« Reply #6 on: August 11, 2017, 03:57:18 PM »
Great picture Doug.  The factory still looks a lot like that with the exception that UPS has added on to the building. 

Kevin