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williamtsullivan(at)att.n
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 Posted: Sun Mar 29, 2020 10:33 am Post subject: Centering ULTRASTAR help! |
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That is not an Ultrastar, it's one version of a Firestar. I can't tell any more without looking at the wings.
Bill Sullivan
On Sunday, March 29, 2020, 01:23:26 PM EDT, Eric SOULET <eric.soulet(at)diag-dechets.fr> wrote:
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Hello,
I have an Ultrastar Kolb which is strongly punctual despite the trim fully
The centering is at 29%.
I have to modify the incidence of the stabilizer.
On langing engine idling it even becomes dangerous.
Do you have any advice!
Cordialement
Eric SOULET
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Soussou
Joined: 29 Mar 2020
Posts: 1
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| Posted: Sun Mar 29, 2020 2:26 pm Post subject: Centering ULTRASTAR help! |
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Hello,
I have an Ultrastar Kolb which is strongly punctual despite the trim fully
The centering is at 29%.
I have to modify the incidence of the stabilizer.
On langing engine idling it even becomes dangerous.
Do you have any advice!
Cordialement
Eric SOULET from France
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jaydub
Joined: 07 Jan 2020
Posts: 74
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| Posted: Sun Mar 29, 2020 2:26 pm Post subject: Centering ULTRASTAR help! |
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Most all ultralight and very light sport planes you can't land like a normal airplane, at idle. Im guessing that you are trying to fly this like a bigger airplane. They don't have the mass to flare without stalling higher than you want. If you are at idle you will run out of elevator before you can fully flare because your airspeed will drop off quickly when you try to flare. You will have to carry power to the ground. This is somewhat typical of ultralight and light sport aircraft and many GA pilots don't understand that these fly differently.
Jay
------------------------------------
I am responsible for the idea behind this message. Unfortunately, the email you received may be substantially different from that idea due to my iDroid's autocorrect feature!
On Sun, Mar 29, 2020 at 12:36 PM -0600, "Eric SOULET" <eric.soulet(at)diag-dechets.fr (eric.soulet(at)diag-dechets.fr)> wrote:
| Quote: | v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} <![endif]--> <![endif]--> <![endif]-->
Hello,
I have an Ultrastar Kolb which is strongly punctual despite the trim fully
The centering is at 29%.
I have to modify the incidence of the stabilizer.
On langing engine idling it even becomes dangerous.
Do you have any advice!
Cordialement
Eric SOULET
[img]cid:image002.jpg(at)01D605FE.339FA1A0[/img]
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Pfatchantz(at)protonmail.
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| Posted: Sun Mar 29, 2020 2:26 pm Post subject: Centering ULTRASTAR help! |
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High boom tube says Ultrastar... Looks like the translation to english is a bit faulty...Herb
Sent with ProtonMail Secure Email.
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Sunday, March 29, 2020 12:30 PM, william sullivan <williamtsullivan(at)att.net> wrote:
| Quote: | That is not an Ultrastar, it's one version of a Firestar. I can't tell any more without looking at the wings.
Bill Sullivan
On Sunday, March 29, 2020, 01:23:26 PM EDT, Eric SOULET <eric.soulet(at)diag-dechets.fr> wrote:
Hello,
I have an Ultrastar Kolb which is strongly punctual despite the trim fully
The centering is at 29%.
I have to modify the incidence of the stabilizer.
On langing engine idling it even becomes dangerous.
Do you have any advice!
Cordialement
Eric SOULET
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Pfatchantz(at)protonmail.
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| Posted: Sun Mar 29, 2020 2:27 pm Post subject: Centering ULTRASTAR help! |
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too..this ultrastar has nose wheel which is a mod...Why dangerous? With nose wheel and extra weight, I can see an unusual stall ...Herb
Sent with ProtonMail Secure Email.
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Sunday, March 29, 2020 12:18 PM, Eric SOULET <eric.soulet(at)diag-dechets.fr> wrote:
| Quote: |
Hello,
I have an Ultrastar Kolb which is strongly punctual despite the trim fully
The centering is at 29%.
I have to modify the incidence of the stabilizer.
On langing engine idling it even becomes dangerous.
Do you have any advice!
Cordialement
Eric SOULET
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mojavjoe
Joined: 23 Dec 2013
Posts: 64
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| Posted: Sun Mar 29, 2020 5:47 pm Post subject: Centering ULTRASTAR help! |
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I suggest you cover the wing gap.
| Quote: | On March 29, 2020 at 4:12 PM Eric SOULET <eric.soulet(at)diag-dechets.fr> wrote:
Hello,
I have an Ultrastar Kolb which is strongly punctual despite the trim fully
The centering is at 29%.
I have to modify the incidence of the stabilizer.
On langing engine idling it even becomes dangerous.
Do you have any advice!
Cordialement
Eric SOULET from France
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http://www.matronics.com/Navigator?Kolb-List |
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Mon Mar 30, 2020 11:27 am Post subject: Centering ULTRASTAR help! |
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William, I had to load the picture into my photo editor to see what Eric's
airplane really is. It is an Ultrastar all right, the boom comes from the
wing junction with the engine below, but someone tacked a nose gear onto it
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_________________
The smallest miracle right in front of you is enough to make you happy.... |
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Mon Mar 30, 2020 11:36 am Post subject: Centering ULTRASTAR help! |
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Eric, What you have is someone's own ideas plastered on to something that looks like an Ultrastar. The biggest problem, concern, whatever, is the nose wheel. Second is the way your elevators are hanging from the horizontal stabilizer. You've got a real mess here.As for landing, the best advice I can give you is what I was given when I got my Mk III 14 years ago. Don't try to come in at idle, fly it on until you're used to how it lands. I made a video of landing the MK III you can find on Youtube at rick51076. It was intended for people transitioning from GA aircraft to the Kolb and dealt mostly with the difference using flaps make.
Good luck, stay healthy, and blur skies,
Rick
 Virus-free. www.avg.com [url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2][/url]
On Sun, Mar 29, 2020 at 8:50 PM JOSEPH WRIGHT <mojavjoe(at)comcast.net (mojavjoe(at)comcast.net)> wrote:
| Quote: | I suggest you cover the wing gap.
| Quote: | On March 29, 2020 at 4:12 PM Eric SOULET <eric.soulet(at)diag-dechets.fr (eric.soulet(at)diag-dechets.fr)> wrote:
Hello,
I have an Ultrastar Kolb which is strongly punctual despite the trim fully
The centering is at 29%.
I have to modify the incidence of the stabilizer.
On langing engine idling it even becomes dangerous.
Do you have any advice!
Cordialement
Eric SOULET from France
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--
“Blessed are the cracked, for they shall let in the light.” Groucho Marx
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_________________
The smallest miracle right in front of you is enough to make you happy.... |
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williamtsullivan(at)att.n
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| Posted: Mon Mar 30, 2020 11:40 am Post subject: Centering ULTRASTAR help! |
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Huh. Thanks. I couldn't see that. Weird.
do not archive
On Monday, March 30, 2020, 03:27:22 PM EDT, Richard Girard <aslsa.rng(at)gmail.com> wrote:
William, I had to load the picture into my photo editor to see what Eric's airplane really is. It is an Ultrastar all right, the boom comes from the wing junction with the engine below, but someone tacked a nose gear onto it.
Rick
Virus-free. www.avg.com [url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2][/url]
On Sun, Mar 29, 2020 at 1:35 PM william sullivan <williamtsullivan(at)att.net (williamtsullivan(at)att.net)> wrote:
| Quote: | That is not an Ultrastar, it's one version of a Firestar. I can't tell any more without looking at the wings.Bill Sullivan
On Sunday, March 29, 2020, 01:23:26 PM EDT, Eric SOULET <eric.soulet(at)diag-dechets.fr (eric.soulet(at)diag-dechets.fr)> wrote:
Hello,
I have an Ultrastar Kolb which is strongly punctual despite the trim fully
The centering is at 29%.
I have to modify the incidence of the stabilizer.
On langing engine idling it even becomes dangerous.
Do you have any advice!
Cordialement
Eric SOULET
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-- “Blessed are the cracked, for they shall let in the light.” Groucho Marx
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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byoungplumbing(at)gmail.c
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| Posted: Mon Mar 30, 2020 12:05 pm Post subject: Centering ULTRASTAR help! |
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Eric sent me a email off list. French English translator gave me this.
Thank you for your interest in my message. I have 2 Ultrastar 1 purple and 1 blue. Purple flies very well see on YouTube: https://youtu.be/5ulWECN9dmA, it has a stabilizer incidence adjustment: see purple stab. The blue is very pungent after the first flight I changed the incidence of the stabilizer: see blue stab. On the second flight of the blue, less but still stinging, see position of the depth trim: blue trim. So I checked the centering which is good 29%, see centering. I don’t know if I’m focusing further back or changing the angle of the stabilizer again.
Boyd Young
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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stuart(at)harnerfarm.net
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| Posted: Mon Mar 30, 2020 3:00 pm Post subject: Centering ULTRASTAR help! |
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Doing a lot of reading between the lines here but my take is that the blue one is having pitch issues. If the 29% is a reference to the center of gravity being at 29% of wing cord, my guess is that his CG is too far forward. Probably due to the nose wheel?
If this is correct, I can see him running out of elevator in a flair and wheel borrowing the nose gear on landing.
Did I miss something?
Stuart
From: owner-kolb-list-server(at)matronics.com [mailto:owner-kolb-list-server(at)matronics.com] On Behalf Of B Young
Sent: Monday, March 30, 2020 3:05 PM
To: Kolb List
Subject: Re: Centering ULTRASTAR help!
Eric sent me a email off list. French English translator gave me this.
Thank you for your interest in my message. I have 2 Ultrastar 1 purple and 1 blue. Purple flies very well see on YouTube: https://youtu.be/5ulWECN9dmA, it has a stabilizer incidence adjustment: see purple stab. The blue is very pungent after the first flight I changed the incidence of the stabilizer: see blue stab. On the second flight of the blue, less but still stinging, see position of the depth trim: blue trim. So I checked the centering which is good 29%, see centering. I don’t know if I’m focusing further back or changing the angle of the stabilizer again.
Boyd Young
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Richard Pike
Joined: 09 Jan 2006
Posts: 1669
Location: Blountville, Tennessee
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| Posted: Mon Mar 30, 2020 5:00 pm Post subject: Re: Centering ULTRASTAR help! |
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In the video that was linked - https://youtu.be/5ulWECN9dmA - It is hard to tell from the video, but it appears that there is a very high ground speed before lifting off. It is also apparent that there is no gap seal. If the cg is at 29% and there is no gap seal, I am surprised that there is enough elevator authority to be able to land it at any speed.
Friend Eric; install a gap seal over the center section of the wings and get rid of some of the weight in the front of the airplane.
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_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing. |
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smedley
Joined: 04 Feb 2020
Posts: 18
Location: Hatfield PA
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| Posted: Tue Mar 31, 2020 6:39 am Post subject: Centering ULTRASTAR help! |
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I remember when flying in the 80's and 90's they said at Kolb not to fly it without the gap seal. Apparently it does make a difference. Has anyone tried it? What was the resulting effect?
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Richard Pike
Joined: 09 Jan 2006
Posts: 1669
Location: Blountville, Tennessee
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| Posted: Tue Mar 31, 2020 4:09 pm Post subject: Re: Centering ULTRASTAR help! |
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Years ago my friend Carl had the fabric center section gap seal come loose on his Firestar just as he lifted off, he was a good pilot but it about ate him alive.
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_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing. |
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Wed Apr 01, 2020 6:21 am Post subject: Centering ULTRASTAR help! |
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The first few flights I made with the PFH (Plane From Hell), a Mk IIIX were with a completely ineffective structure that claimed to be a gap seal. The plane had lawn dart issues and scared the **** out of me. I made a good gap seal and many of the issues went away but the main thing that happened was that the climb rate DOUBLED!!! Think about it, without a gap seal you're flying a biplane with parallel wings, i.e. twice as many wingtip vortices. If you figure that the regular wingtip vortices reduce the lift area of the wing by 20% doubling that reduces your wing efficiency to less than 60% (figuring that the inboard wingtips at the center section are also reducing prop efficiency, too.While it's not an issue on the Ultrastar, The PFH also didn't have the center frame covered. Covering it also added to the wings efficiency. Having both seals and adding trim tabs to the elevator finally solved the lawn dart issues and the plane flew with just finger tips on the stick.
Bottom line, NO, I wouldn't fly any Kolb without a gap seal ever again what with the toilet paper shortage. :-}
Rick
On Tue, Mar 31, 2020 at 9:41 AM Edward Bonsell <smedley945(at)gmail.com (smedley945(at)gmail.com)> wrote:
| Quote: | I remember when flying in the 80's and 90's they said at Kolb not to fly it without the gap seal. Apparently it does make a difference. Has anyone tried it? What was the resulting effect?
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“Blessed are the cracked, for they shall let in the light.” Groucho Marx
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
The smallest miracle right in front of you is enough to make you happy.... |
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olendorf
Joined: 06 Jul 2006
Posts: 140
Location: Schenectady, NY USA
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| Posted: Wed Apr 01, 2020 7:52 am Post subject: Re: Centering ULTRASTAR help! |
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Several years ago my gap seal with the zipper style fabric ripped so I decided to fly without one. I remember (vaguely) my take off speed increased from 30 to 42. My stall speed increased to about 40. My top speed decreased to about 50. I ran the pattern at 90% power and landed it hot. I'll never do that again.
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_________________
Scott Olendorf
Original Firestar, Rotax 447, Powerfin prop
Schenectady, NY
http://sites.google.com/site/kolbfirestar/ |
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