Search found 115 matches

by Sandro Picchio
Thu May 04, 2023 9:34 am
Forum: General Topics
Topic: Seagull in film
Replies: 0
Views: 22904

Seagull in film

Hi all, I recently saw on TV a film - I think (not sure) the title is "Storm Boy" about an Australian boy growing three orphaned pelikans. A Seagull (110?) has a rather important role in the story, both as an engine for a little boat and as a grinder/mixer on dry land for the fish pudding ...
by Sandro Picchio
Sun Feb 13, 2022 11:42 pm
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12199

Re: HP and Thrust

Thank you for sharing the interesting old document. It says that there is a difference between results of bollard pull and of moving boat test. Unfortunately it does not say in which direction is dhe difference. I wrote a post yesterday and thought to have sent it but I don't find it in the thread. ...
by Sandro Picchio
Sat Feb 12, 2022 4:07 pm
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12199

Re: HP and Thrust

I fully agree that, at same throttle opening, revs are higher when the motor is free to move forward in the water than when it is kept fast on a dock. But I think that just this increase in revs means a lower torque load on the motor. What can be argued is: Is propeller torque proportional to propel...
by Sandro Picchio
Sat Feb 12, 2022 11:16 am
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12199

Re: HP and Thrust

I would say that more revs means less torque load on the motor from the prop that is less push.
Usually at same throttle opening easing the load (torque) revs increase.
I may be wrong.
by Sandro Picchio
Fri Feb 11, 2022 6:07 pm
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12199

Re: HP and Thrust

Quote: "Which was higher than the static bollard pull". So between readings done against a static bollard or in a boat underway there is difference. Is this difference large? I expected that the value given by the bollard pull test would have been higher than that on a moving boat. If one ...
by Sandro Picchio
Fri Feb 11, 2022 5:50 pm
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12199

Re: HP and Thrust

Post edited. See next post.
by Sandro Picchio
Sun Nov 21, 2021 3:19 pm
Forum: General Topics
Topic: Amal carb banjo fiber washers
Replies: 10
Views: 10261

Re: Amal carb banjo fiber washers

The fuel tap leaking might be fixed by removing the cork part and boiling it in water.
by Sandro Picchio
Sun Nov 21, 2021 3:11 pm
Forum: General Topics
Topic: Restoration
Replies: 9
Views: 9706

Re: Restoration

After long search I could find gear oil 140 in a lorry repair workshop.
Hope this helps.
by Sandro Picchio
Thu Sep 23, 2021 6:03 pm
Forum: Help
Topic: Heat Transfer - POR-15
Replies: 7
Views: 14853

Re: Heat Transfer - POR-15

Did it crack because of frozing in the shed or just because of the push of the swelling rust?

Sandro
by Sandro Picchio
Sat Jul 31, 2021 5:20 pm
Forum: General Topics
Topic: What's this Seagull spanner?
Replies: 4
Views: 10914

Re: What's this Seagull spanner?

Hi Whigum,
This spanner came with my new 40+ in 1963. (and is still with it).

Sandro
by Sandro Picchio
Sun May 16, 2021 5:59 pm
Forum: General Topics
Topic: Early British Seagull tank
Replies: 12
Views: 21984

Re: Early British Seagull tank

Very interesting stories.
by Sandro Picchio
Mon May 03, 2021 11:48 am
Forum: General Topics
Topic: You Tube Videos that should provoke some conversations
Replies: 5
Views: 9385

Re: You Tube Videos that should provoke some conversations

i also stopped watching.
What amazed me is the number of positive, approving comments to the video.

Sandro
by Sandro Picchio
Wed Apr 28, 2021 11:08 am
Forum: General Topics
Topic: Featherweight “Special”
Replies: 7
Views: 9665

Re: Featherweight “Special”

Would be charmed to hear the sound.

I would have kept the mechanical function of the exhaust by removing the after half for most of le length, keeping the ends intact.

Sandro
by Sandro Picchio
Tue Apr 20, 2021 9:15 am
Forum: General Topics
Topic: One for the kids
Replies: 9
Views: 12322

Re: One for the kids

Thank you Journeyman,
I did not know Optimist already existed in the 40's. I considered it as a modern boat. (although "modern" in my thinking would be "vintage" in most's).
Sandro
by Sandro Picchio
Fri Apr 16, 2021 4:07 pm
Forum: General Topics
Topic: One for the kids
Replies: 9
Views: 12322

Re: One for the kids

I don't remember if the Optimist has rowlocks or not.