RC Scale Aircraft Discuss rc scale aircraft here (for giant scale see category above)

Seidel 7-70 radial: Help me decide!

Reply
Old 09-29-2010, 11:08 PM
  #151
docsmith
 
Join Date: Feb 2003
Location: Bountiful, UT
Posts: 13
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

I have a Seidel 7-70 with rear collector ring I want to sell. It runs beautifully. I had it on a 1/5 Scale Ziroli Stearman. It flew 6 times - never crashed. They are rare and beautiful. Contact me if you are interested.

D. Smith
docsmith is offline  
Reply With Quote
Old 09-30-2010, 12:08 AM
  #152
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Is this one of the "new" Seidels or the older, made-in-Germany version? Did you buy the collector from Seidel or is it "after-market" or home-built. I'm planning on running mine without the collector.
abufletcher is offline  
Reply With Quote
Old 09-30-2010, 12:11 AM
  #153
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

BTW, here's an eBay auction for one of the older versions of the 7-cylinder Seidel.

http://cgi.ebay.com/Seidel-ST-726-7-...item33613e2b46
abufletcher is offline  
Reply With Quote
Old 09-30-2010, 06:58 AM
  #154
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Quote:
ORIGINAL: Frank Sopwith
But a test stand can be made in a day and we will enjoy the sound of this engine soon!
What I'm thinking of doing is to build a removable module as seen in the EIII below and then make it so this unit can "dock" with a stand for engine tests. Then, when I eventually get to building a model (or models) I can just slip this unit in place and bolt on.

So, does anyone happen to have a design for one of these sitting around...or do I need to work it out myself?
Attached Thumbnails
Click image for larger version

Name:	Qo39622.jpg
Views:	23
Size:	124.0 KB
ID:	1508775  
abufletcher is offline  
Reply With Quote
Old 09-30-2010, 07:06 AM
  #155
geezeraviation
 
geezeraviation's Avatar
 
Join Date: Nov 2007
Location: Greeneville Tn.
Posts: 1,734
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Don a radial without a collector ring creates an oil storm of epic proportion, ask anyone who has run one with the straight pipes.
Doc
geezeraviation is offline  
Reply With Quote
Old 09-30-2010, 07:16 AM
  #156
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Just exactly like the original rotaries! One of the main functions of those WWI cowls was just to keep the oil from flying all over everything...which it pretty much did anyway.

Anyway, we'll see. If I absolutely have to have one, I'll eventually work something out.
abufletcher is offline  
Reply With Quote
Old 09-30-2010, 07:57 AM
  #157
Teus
 
Teus's Avatar
 
Join Date: Jan 2007
Posts: 765
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Quote:
ORIGINAL: abufletcher

So, does anyone happen to have a design for one of these sitting around...or do I need to work it out myself?
Don, check your E.III drawings
Teus is offline  
Reply With Quote
Old 09-30-2010, 07:59 AM
  #158
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Quote:
ORIGINAL: Teus
Don, check your E.III drawings
Oops! Guess I need to look harder! [sm=red_smile.gif] Hmmm, that sorta helps...
Attached Thumbnails
Click image for larger version

Name:	Yw68615.jpg
Views:	35
Size:	137.7 KB
ID:	1508793  
abufletcher is offline  
Reply With Quote
Old 10-01-2010, 10:00 PM
  #159
docsmith
 
Join Date: Feb 2003
Location: Bountiful, UT
Posts: 13
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

I have the Seidel 7-70 which was made in Germany (Imported by Proctor). It has exposed valve lifters. The rear collector ring is an original Seidel.

Dean Smith
docsmith is offline  
Reply With Quote
Old 10-02-2010, 06:43 AM
  #160
geezeraviation
 
geezeraviation's Avatar
 
Join Date: Nov 2007
Location: Greeneville Tn.
Posts: 1,734
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Those WWI cowls were housing rotary engines that were rotating and thier exhaust stroke was at the open portion of the cowl on the bottom. not to say that the whirling dervish didnt drag some of that exhaust up and around the inside of the cowl because I have watched them wipe the oil off of the Fok Dr 1 at Kingsbury Aerodrome after a flight, it's Le Rhone powered and the entire length of the fuse sides, bottom, tail group and landing gear are dripping castor upon landing. A whole gang of guys gets on it immediately as it will stain the dope the airplane is finished with like yellowed varnish.
Doc
geezeraviation is offline  
Reply With Quote
Old 10-02-2010, 07:55 AM
  #161
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Sounds perfect!
abufletcher is offline  
Reply With Quote
Old 10-06-2010, 06:51 AM
  #162
jfassino
 
Join Date: Sep 2003
Location: Dunlap, IL
Posts: 91
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Ordered a Seidel 770 a short time ago and it arrived yesterday. Thought you might enjoy the unpacking of one of these radials. Radial Strip Tease

Jim
Attached Thumbnails
Click image for larger version

Name:	Ca80396.jpg
Views:	17
Size:	45.1 KB
ID:	1511803   Click image for larger version

Name:	Vq50968.jpg
Views:	18
Size:	33.0 KB
ID:	1511804   Click image for larger version

Name:	Af88843.jpg
Views:	18
Size:	27.0 KB
ID:	1511805   Click image for larger version

Name:	Hb81156.jpg
Views:	32
Size:	39.2 KB
ID:	1511806   Click image for larger version

Name:	Mx23601.jpg
Views:	20
Size:	50.5 KB
ID:	1511807   Click image for larger version

Name:	Vl80772.jpg
Views:	19
Size:	51.9 KB
ID:	1511808   Click image for larger version

Name:	Hj88753.jpg
Views:	16
Size:	39.7 KB
ID:	1511809   Click image for larger version

Name:	Kj31277.jpg
Views:	24
Size:	61.5 KB
ID:	1511810  

Click image for larger version

Name:	Po98035.jpg
Views:	19
Size:	52.5 KB
ID:	1511811   Click image for larger version

Name:	Vh46381.jpg
Views:	20
Size:	56.8 KB
ID:	1511812   Click image for larger version

Name:	Lr75010.jpg
Views:	25
Size:	61.2 KB
ID:	1511813   Click image for larger version

Name:	Ak50512.jpg
Views:	22
Size:	56.4 KB
ID:	1511814  
jfassino is offline  
Reply With Quote
Old 10-06-2010, 06:57 AM
  #163
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

ooh, take it off, baby! Take it ALL off! Mine should be here in a week or so.
abufletcher is offline  
Reply With Quote
Old 10-07-2010, 12:06 AM
  #164
dmyers0403
 
Join Date: May 2002
Location: Alma, AR
Posts: 668
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

What is the outside diameter of 7-70 radial-min. size cowl required??
dmyers0403 is offline  
Reply With Quote
Old 10-07-2010, 12:11 AM
  #165
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

According to Seidel's specs it's 230mm. But I'm not sure how they measure that. Luckily most of the cowls for 1/4 scale WWI models would be in the range of 260mm, so no problem.
abufletcher is offline  
Reply With Quote
Old 10-12-2010, 07:34 PM
  #166
V2PLUS10
 
Join Date: May 2003
Location: Boise, ID
Posts: 884
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

You already got it and you are just not telling us...right?
V2PLUS10 is offline  
Reply With Quote
Old 10-12-2010, 07:42 PM
  #167
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Yesterday, I got an email from UMS saying they were going to ship it today. The real question is how long it might be held up in Japanese customs. Experience tells me it will either go straight through, or might take up to a month to clear.
abufletcher is offline  
Reply With Quote
Old 10-13-2010, 02:09 AM
  #168
Spuetz
 
Spuetz's Avatar
 
Join Date: Jan 2003
Location: Koeln, GERMANY
Posts: 691
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Hello everyone,

I am back with good news.

My Proctor Nieuport flies! And how she flies! Beautifully!
I was a little bit concerned with the weight (20.5 lbs) and the C/G: Very confusing Plan indications. Thanks to everyone who helped.

On Monday I finally rented a small truck (cause I did not want to dismantle and reassemble). It was a gorgeous day here in Germany, way too warm for the season, deep blue skies and a light wind.
I was quite nervous when I slowly advanced the throttle. Will she turn on her back, nose straight up in the air? Fall apart on takeoff what with all the flimsy proctor-scale fixings?
Nooo! I hadn't even reached half throttle when she - very gently - lifted herself of and tracked straight ahead into the blue sky. Little down trim - ah - she seems to be a little tail heavy?
What a joy to fly. So docile, smooth and slow. I hadn't thought that she'll be that slow what with all that weight.
Landing was the most beautiful non-event of the year! keep the throttle slightly open on final and only take it all the way back in the flare - and she sets herself down ever so gently. A greaser if it wasn't for the grass....

What a joy.

PS: BTW that is not Major John Huffer in the pilot's seat. It is Warren Pietsch. I convinced him to leave his Hangar9 Taylorcraft for a moment to test fly the Nieuport. Needed someone reliable!
Attached Thumbnails
Click image for larger version

Name:	Lj23701.jpg
Views:	31
Size:	57.8 KB
ID:	1515711   Click image for larger version

Name:	Fa86506.jpg
Views:	30
Size:	77.7 KB
ID:	1515712   Click image for larger version

Name:	Kp32918.jpg
Views:	33
Size:	40.7 KB
ID:	1515713   Click image for larger version

Name:	Qk22576.jpg
Views:	29
Size:	36.9 KB
ID:	1515714   Click image for larger version

Name:	It98979.jpg
Views:	29
Size:	68.1 KB
ID:	1515715  
Spuetz is offline  
Reply With Quote
Old 10-13-2010, 04:32 AM
  #169
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Great to hear of a successful "Seidel" flight! Oh, and the model it's hauling around is pretty ok too. So how would you evaluate the engine performance on this model? How much of the power did you use? How did you have the throttle set up? For example, can you go "full power" if you want to or have you limited the servo movement to only use the low range?
abufletcher is offline  
Reply With Quote
Old 10-13-2010, 04:34 AM
  #170
abufletcher
Thread Starter
 
abufletcher's Avatar
 
Join Date: Feb 2004
Location: Zentsuji, JAPAN
Posts: 15,018
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Quote:
ORIGINAL: Spuetz
...she seems to be a little tail heavy?
Actually tail-heavy or just flying in a tail down attitude but stable?
abufletcher is offline  
Reply With Quote
Old 10-13-2010, 09:27 AM
  #171
BobH
 
Join Date: Mar 2003
Location: Springfield, VA,
Posts: 7,691
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Very nice As Abu has mentioned how was the performance of the plane? It should fly very scale like, hopefully.
BobH is online now  
Reply With Quote
Old 10-13-2010, 09:54 AM
  #172
TFF
 
Join Date: Oct 2006
Location: Memphis, TN
Posts: 4,173
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Thats a nice Nieuport. It is also nice to see that it will fit "standard" cowls. Any temperature problems?
TFF is offline  
Reply With Quote
Old 10-13-2010, 01:10 PM
  #173
Spuetz
 
Spuetz's Avatar
 
Join Date: Jan 2003
Location: Koeln, GERMANY
Posts: 691
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Hello Abu,

no, I did not limit the power - but with full throttle you could probably torque-roll! Waaaaaaaay to much power! (>6000 rpm with a 24x8 prop!) But that's the beauty: This way the engine is running low and slow with that awesome sound.
I wouldn't limit the throttle servo though. Who knows when I will need that extra power... And the airframe seems pretty sturdy.

I did program a throttle curve, though: Slow start, appreciating fast in the end.

As far as the c/g is concerend. After down trimming the elevator, the plane would fly straight and level at any power setting. Only when very slow I need to pull up a bit to keep her flying - as expected.

Cheers, Martin
Spuetz is offline  
Reply With Quote
Old 10-13-2010, 01:47 PM
  #174
Remklep
 
Remklep's Avatar
 
Join Date: Dec 2007
Location: Haarlem, NETHERLANDS
Posts: 257
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Congratulations on the maiden flight.
I'm very excited to hear you are getting more than 6000 rpm with a 24x8.
I am planning a 24x8 3 blade for my Corsair, should run fine.

Where in Germany do you live, I moved to the Netherlands to Mommenheim, just 10km south of Mainz last year.

Danny
Remklep is offline  
Reply With Quote
Old 10-14-2010, 04:57 AM
  #175
dadragon
 
Join Date: Dec 2008
Location: pine bluffs, WY
Posts: 485
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Seidel 7-70 radial: Help me decide!

Abufletcher;thank you for the site in india,they have hydralic landing gear system I've been looking for to put in my 120" A-1 SKYRAIDER,plus that 250 gas radial looks good too,thank you again.
dadragon is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 01:00 PM.